This is a tab-delimited list of names of native and naturalised taxa that are currently
(Tue Sep 15 13:45:38 2009) accepted or tentatively accepted for inclusion in the second edition of The Jepson Manual.
Common names are drawn from the first edition.

Abies amabilis Douglas ex J. Forbes	PINACEAE	PACIFIC SILVER FIR	native	
Abies bracteata (D. Don) A. Poit.	PINACEAE	BRISTLECONE FIR	native	
Abies concolor (Gordon & Glend.) Lindl. ex Hildebr.	PINACEAE	WHITE FIR	native	
Abies grandis (Douglas ex D. Don) Lindl.	PINACEAE	GRAND FIR	native	
Abies lasiocarpa (Hook.) Nutt.	PINACEAE	FIR	native	
Abies lasiocarpa (Hook.) Nutt. var. lasiocarpa	PINACEAE	SUBALPINE FIR	native	
Abies magnifica A. Murray bis	PINACEAE	CALIFORNIA RED FIR	native	
Abies magnifica A. Murray bis var. magnifica	PINACEAE	FIR	native	
Abies magnifica A. Murray bis var. shastensis Lemmon	PINACEAE	SHASTA RED FIR	native	
Abies procera Rehder	PINACEAE	NOBLE FIR	native	
Abronia alpina Brandegee	NYCTAGINACEAE	RAMSHAW MEADOWS ABRONIA	native	
Abronia latifolia Eschsch.	NYCTAGINACEAE	SAND VERBENA	native	
Abronia maritima S. Watson	NYCTAGINACEAE	SAND VERBENA	native	
Abronia nana S. Watson	NYCTAGINACEAE	SAND VERBENA	native	
Abronia nana S. Watson var. covillei (Heimerl) Munz	NYCTAGINACEAE		native	
Abronia pogonantha Heimerl	NYCTAGINACEAE	SAND VERBENA	native	
Abronia turbinata S. Watson	NYCTAGINACEAE	SAND VERBENA	native	
Abronia umbellata Lam.	NYCTAGINACEAE	SAND VERBENA	native	
Abronia umbellata Lam. var. breviflora (Standl.) L. A. Galloway	NYCTAGINACEAE		native	
Abronia umbellata Lam. var. umbellata	NYCTAGINACEAE		native	
Abronia villosa S. Watson	NYCTAGINACEAE	SAND VERBENA	native	
Abronia villosa S. Watson var. aurita (Abrams) Jeps.	NYCTAGINACEAE	SAND VERBENA	native	
Abronia villosa S. Watson var. villosa	NYCTAGINACEAE	SAND VERBENA	native	
Abutilon palmeri A. Gray	MALVACEAE	INDIAN MALLOW	native	
Abutilon parvulum A. Gray	MALVACEAE	INDIAN MALLOW	native	
Abutilon theophrasti Medik.	MALVACEAE	VELVET-LEAF	naturalized	
Acacia baileyana F. Muell.	FABACEAE	COOTAMUNDRA WATTLE	naturalized	
Acacia cultriformis A. Cunn. ex G. Don	FABACEAE		naturalized	acceptance uncertain
Acacia cyclops A. Cunn. ex G. Don	FABACEAE		naturalized	
Acacia dealbata Link	FABACEAE	SILVER WATTLE	naturalized	
Acacia elata A. Cunn. ex Benth.	FABACEAE	CEDAR WATTLE	naturalized	
Acacia longifolia (Andrews) Willd.	FABACEAE	GOLDEN WATTLE; SYDNEY GOLDEN WATTLE	naturalized	
Acacia melanoxylon R. Br.	FABACEAE	BLACKWOOD ACACIA	naturalized	
Acacia paradoxa DC.	FABACEAE	KANGAROO THORN	naturalized	
Acacia pycnantha Benth.	FABACEAE	GOLDEN WATTLE	naturalized	
Acacia redolens Maslin	FABACEAE		naturalized	acceptance uncertain
Acacia retinodes Schltdl.	FABACEAE	EVERBLOOMING ACACIA	naturalized	
Acacia verticillata (L'Hér.) Willd.	FABACEAE	PRICKLY MOSES; STAR ACACIA	naturalized	
Acaena novae-zelandiae Kirk	ROSACEAE	BIDDY-BIDDY	naturalized	
Acaena pinnatifida Ruiz & Pav.	ROSACEAE		native	
Acaena pinnatifida Ruiz & Pav. var. californica (Bitter) Jeps.	ROSACEAE		native	
Acalypha californica Benth.	EUPHORBIACEAE		native	
Acamptopappus shockleyi A. Gray	ASTERACEAE	GOLDENHEAD	native	
Acamptopappus sphaerocephalus (Harv. & A. Gray) A. Gray	ASTERACEAE	GOLDENHEAD	native	
Acamptopappus sphaerocephalus (Harv. & A. Gray) A. Gray var. hirtellus S. F. Blake	ASTERACEAE	GOLDENHEAD	native	
Acamptopappus sphaerocephalus (Harv. & A. Gray) A. Gray var. sphaerocephalus	ASTERACEAE	GOLDENHEAD	native	
Acanthomintha duttonii (Abrams) Jokerst	LAMIACEAE	SAN MATEO THORNMINT	native	
Acanthomintha ilicifolia (A. Gray) A. Gray	LAMIACEAE	SAN DIEGO THORNMINT	native	
Acanthomintha lanceolata Curran	LAMIACEAE	SANTA CLARA THORNMINT	native	
Acanthomintha obovata Jeps.	LAMIACEAE	THORNMINT	native	
Acanthomintha obovata Jeps. subsp. cordata Jokerst	LAMIACEAE	THORNMINT	native	
Acanthomintha obovata Jeps. subsp. obovata	LAMIACEAE	SAN BENITO THORNMINT	native	
Acanthoscyphus parishii (Parry) Small	POLYGONACEAE		native	
Acanthoscyphus parishii (Parry) Small var. abramsii (E. A. McGregor) Reveal	POLYGONACEAE		native	
Acanthoscyphus parishii (Parry) Small var. cienegensis (Ertter) Reveal	POLYGONACEAE		native	
Acanthoscyphus parishii (Parry) Small var. goodmaniana (Ertter) Reveal	POLYGONACEAE		native	
Acanthoscyphus parishii (Parry) Small var. parishii	POLYGONACEAE		native	
Acer campestre L.	SAPINDACEAE		naturalized	
Acer circinatum Pursh	SAPINDACEAE	VINE MAPLE	native	
Acer glabrum Torr.	SAPINDACEAE	MOUNTAIN MAPLE	native	
Acer glabrum Torr. var. diffusum (Greene) Smiley	SAPINDACEAE	MAPLE	native	
Acer glabrum Torr. var. greenei A.C. Keller	SAPINDACEAE	MAPLE	native	
Acer glabrum Torr. var. torreyi (Greene) Smiley	SAPINDACEAE	MAPLE	native	
Acer macrophyllum Pursh	SAPINDACEAE	BIG-LEAF MAPLE	native	
Acer negundo L.	SAPINDACEAE	MAPLE	native	
Acer negundo L. var. californicum (Torr. & A. Gray) Sarg.	SAPINDACEAE	BOX ELDER	native	
Acer saccharinum L.	SAPINDACEAE		naturalized	
Achillea millefolium L.	ASTERACEAE	MILFOIL; YARROW	native	
Achlys californica I. Fukuda & H.G. Baker	BERBERIDACEAE	DEER FOOT; VANILLA LEAF	native	
Achlys triphylla (Sm.) DC.	BERBERIDACEAE	DEER FOOT; VANILLA LEAF	native	
Achlys triphylla (Sm.) DC. subsp. triphylla	BERBERIDACEAE	DEER FOOT; VANILLA LEAF	native	
Achnatherum aridum (M. E. Jones) Barkworth	POACEAE	MORMON NEEDLEGRASS	native	
Achnatherum brachychaetum (Godr.) Barkworth	POACEAE	NEEDLEGRASS	naturalized	
Achnatherum coronatum (Thurb.) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum diegoense (Swallen) Barkworth	POACEAE	SAN DIEGO COUNTY NEEDLEGRASS	native	
Achnatherum hymenoides (Roem. & Schult.) Barkworth	POACEAE	INDIAN RICEGRASS	native	
Achnatherum latiglume (Swallen) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum lemmonii (Vasey) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum lemmonii (Vasey) Barkworth subsp. lemmonii	POACEAE	NEEDLEGRASS	native	
Achnatherum lemmonii (Vasey) Barkworth subsp. pubescens (Crampton) Barkworth	POACEAE		native	
Achnatherum lettermanii (Vasey) Barkworth	POACEAE	LETTERMAN'S NEEDLEGRASS	native	
Achnatherum nelsonii (Scribn.) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum nelsonii (Scribn.) Barkworth subsp. dorei (Barkworth & J. R. Maze) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum nevadense (B. L. Johnson) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum occidentale (Thurb. ex S. Watson) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum occidentale (Thurb. ex S. Watson) Barkworth subsp. californicum (Merr. & Burtt Davy) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum occidentale (Thurb. ex S. Watson) Barkworth subsp. occidentale	POACEAE	NEEDLEGRASS	native	
Achnatherum occidentale (Thurb. ex S. Watson) Barkworth subsp. pubescens (Vasey) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum parishii (Vasey) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum pinetorum (M. E. Jones) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum speciosum (Trin. & Rupr.) Barkworth	POACEAE	DESERT NEEDLEGRASS	native	
Achnatherum stillmanii (Bol.) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum thurberianum (Piper) Barkworth	POACEAE	NEEDLEGRASS	native	
Achnatherum webberi (Thurb.) Barkworth	POACEAE	NEEDLEGRASS	native	
Achyrachaena mollis Schauer	ASTERACEAE	BLOW-WIVES	native	
Achyronychia cooperi Torr. & A. Gray	CARYOPHYLLACEAE	FROST-MAT; ONYX FLOWER	native	
Acleisanthes longiflora A. Gray	NYCTAGINACEAE	ANGEL TRUMPETS	native	
Acleisanthes nevadensis (Standl.) B. L.Turner	NYCTAGINACEAE		native	
Aconitum columbianum Nutt.	RANUNCULACEAE	MONKSHOOD	native	
Aconogonon davisiae (W. H. Brewer ex A. Gray) Soják	POLYGONACEAE		native	
Aconogonon newberryi (Small) Soják	POLYGONACEAE		native	
Aconogonon phytolaccifolium (Meisn. ex Small) Small ex Rydb.	POLYGONACEAE		native	
Acourtia microcephala DC.	ASTERACEAE		native	
Acrachne racemosa (B. Heyne ex Roem. & Schult.) Ohwi	POACEAE		naturalized	acceptance uncertain
Acroptilon repens (L.) DC.	ASTERACEAE	RUSSIAN KNAPWEED	naturalized	
Actaea rubra (Aiton) Willd.	RANUNCULACEAE	BANEBERRY	native	
Adenocaulon bicolor Hook.	ASTERACEAE	TRAIL PLANT	native	
Adenophyllum cooperi (A. Gray) Strother	ASTERACEAE		native	
Adenophyllum porophylloides (A. Gray) Strother	ASTERACEAE		native	
Adenostoma fasciculatum Hook. & Arn.	ROSACEAE	CHAMISE	native	
Adenostoma sparsifolium Torr.	ROSACEAE	RED SHANK	native	
Adiantum aleuticum (Rupr.) C. A. Paris	PTERIDACEAE	FIVE-FINGER FERN	native	
Adiantum capillus-veneris L.	PTERIDACEAE	SOUTHERN MAIDEN-HAIR	native	
Adiantum jordanii Müll. Hal.	PTERIDACEAE	CALIFORNIA MAIDEN-HAIR	native	
Adolphia californica S. Watson	RHAMNACEAE	CALIFORNIA ADOLPHIA; SPINESHRUB	native	
Adonis aestivalis L.	RANUNCULACEAE		naturalized	
Aegilops cylindrica Host	POACEAE	JOINTED GOATGRASS	naturalized	
Aegilops ovata L.	POACEAE	GOATGRASS	naturalized	
Aegilops triuncialis L.	POACEAE	BARBED GOATGRASS	naturalized	
Aeonium arboreum (L.) Webb & Berthel.	CRASSULACEAE		naturalized	
Aeonium arboreum (L.) Webb & Berthel. var. arboreum	CRASSULACEAE		naturalized	
Aeonium haworthii Webb & Berthel.	CRASSULACEAE		naturalized	
Aesculus californica (Spach) Nutt.	SAPINDACEAE	CALIFORNIA BUCKEYE	native	
Agastache parvifolia Eastw.	LAMIACEAE	HORSEMINT	native	
Agastache urticifolia (Benth.) Kuntze	LAMIACEAE	HORSEMINT	native	
Agave deserti Engelm.	AGAVACEAE		native	
Agave deserti Engelm. var. deserti	AGAVACEAE		native	
Agave deserti Engelm. var. simplex (Gentry) W. C. Hodgs. & Reveal	AGAVACEAE		native	
Agave shawii Engelm.	AGAVACEAE	SHAW'S AGAVE	native	
Agave shawii Engelm. var. shawii	AGAVACEAE		native	
Agave utahensis Engelm.	AGAVACEAE	UTAH AGAVE	native	
Agave utahensis Engelm. var. eborispina (Hester) Breitung	AGAVACEAE		native	
Agave utahensis Engelm. var. nevadensis Engelm. ex Greenm. & Roush	AGAVACEAE		native	
Ageratina adenophora (Spreng.) R. M. King & H. Rob.	ASTERACEAE		naturalized	
Ageratina herbacea (A. Gray) R. M. King & H. Rob.	ASTERACEAE		native	
Ageratina occidentalis (Hook.) R. M. King & H. Rob.	ASTERACEAE		native	
Ageratina shastensis (D. W. Taylor & Stebbins) R. M. King & H. Rob.	ASTERACEAE	SHASTA EUPATORIUM	native	
Agoseris apargioides (Less.) Greene	ASTERACEAE		native	
Agoseris apargioides (Less.) Greene var. apargioides	ASTERACEAE		native	
Agoseris apargioides (Less.) Greene var. eastwoodiae (Fedde) Munz	ASTERACEAE		native	
Agoseris aurantiaca (Hook.) Greene	ASTERACEAE		native	
Agoseris elata (Nutt.) Greene	ASTERACEAE		native	
Agoseris glauca (Pursh) Raf.	ASTERACEAE		native	
Agoseris glauca (Pursh) Raf. var. glauca	ASTERACEAE		native	
Agoseris glauca (Pursh) Raf. var. monticola (Greene) Q. Jones	ASTERACEAE		native	
Agoseris grandiflora (Nutt.) Greene	ASTERACEAE		native	
Agoseris grandiflora (Nutt.) Greene var. grandiflora	ASTERACEAE		native	
Agoseris grandiflora (Nutt.) Greene var. leptophylla G. I. Baird	ASTERACEAE		native	
Agoseris heterophylla (Nutt.) Greene	ASTERACEAE		native	
Agoseris heterophylla (Nutt.) Greene var. cryptopleura (Nutt.) Greene	ASTERACEAE		native	
Agoseris heterophylla (Nutt.) Greene var. heterophylla	ASTERACEAE		native	
Agoseris hirsuta (Hook.) Greene	ASTERACEAE		native	
Agoseris parviflora (Nutt.) D. Dietr.	ASTERACEAE		native	
Agoseris retrorsa (Benth.) Greene	ASTERACEAE		native	
Agrimonia gryposepala Wallr.	ROSACEAE	COMMON AGRIMONY	native	
Agrimonia striata Michx.	ROSACEAE		native	
Agropyron cristatum (L.) Gaertn.	POACEAE		naturalized	acceptance uncertain
Agropyron desertorum (Fisch.) Schult.	POACEAE	DESERT CRESTED WHEATGRASS	naturalized	
Agrostemma githago L.	CARYOPHYLLACEAE	CORN-COCKLE	naturalized	
Agrostemma githago L. var. githago	CARYOPHYLLACEAE		naturalized	
Agrostis avenacea J. F. Gmel.	POACEAE	BENT	naturalized	
Agrostis blasdalei Hitchc.	POACEAE	BLASDALE'S BENT GRASS	native	
Agrostis capillaris L.	POACEAE	COLONIAL BENT	naturalized	
Agrostis densiflora Vasey	POACEAE	BENT	native	
Agrostis elliottiana Schult.	POACEAE	BENT	native	
Agrostis exarata Trin.	POACEAE	BENT	native	
Agrostis gigantea Roth	POACEAE	BENT	naturalized	
Agrostis hallii Vasey	POACEAE	BENT	native	
Agrostis hendersonii Hitchc.	POACEAE	HENDERSON'S BENT GRASS	native	
Agrostis hooveri Swallen	POACEAE	HOOVER'S BENT GRASS	native	
Agrostis humilis Vasey	POACEAE	MOUNTAIN BENT GRASS	native	
Agrostis idahoensis Nash	POACEAE	BENT	native	
Agrostis microphylla Steud.	POACEAE	BENT	native	
Agrostis oregonensis Vasey	POACEAE	BENT	native	
Agrostis pallens Trin.	POACEAE	BENT	native	
Agrostis scabra Willd.	POACEAE	BENT	native	
Agrostis semiverticillata (Forssk.) C. Chr.	POACEAE	BENT	native	acceptance uncertain
Agrostis stolonifera L.	POACEAE	CREEPING BENT	naturalized	
Agrostis tandilensis (Kuntze) Parodi	POACEAE	BENT	naturalized	
Agrostis thurberiana Hitchc.	POACEAE	BENT	native	
Agrostis variabilis Rydb.	POACEAE	BENT	native	
Ailanthus altissima (Mill.) Swingle	SIMAROUBACEAE	TREE OF HEAVEN	naturalized	
Aira caryophyllea L.	POACEAE	SILVER EUROPEAN HAIRGRASS	naturalized	
Aira elegantissima Schur	POACEAE	ELEGANT EUROPEAN HAIRGRASS	naturalized	
Aira praecox L.	POACEAE	EUROPEAN HAIRGRASS	naturalized	
Albizia julibrissin Durazz.	FABACEAE		naturalized	
Albizia lophantha (Willd.) Benth.	FABACEAE	PLUME ACACIA	naturalized	
Alcea rosea L.	MALVACEAE	HOLLYHOCK	naturalized	
Alhagi maurorum Medik.	FABACEAE		naturalized	
Aliciella humillima (Brand) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella hutchinsifolia (Rydb.) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella latifolia (S. Watson) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella latifolia (S. Watson) J. M. Porter subsp. imperialis (S. L. Welsh) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella latifolia (S. Watson) J. M. Porter subsp. latifolia	POLEMONIACEAE		native	acceptance uncertain
Aliciella lottiae (A.G. Day) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella micromeria (A. Gray) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella ripleyi (Barneby) J. M. Porter	POLEMONIACEAE		native	acceptance uncertain
Aliciella triodon (Eastw.) Brand	POLEMONIACEAE		native	acceptance uncertain
Alisma gramineum Lej.	ALISMATACEAE	WATER PLANTAIN	native	
Alisma lanceolatum With.	ALISMATACEAE	WATER PLANTAIN	naturalized	
Alisma triviale Pursh	ALISMATACEAE		native	
Allenrolfea occidentalis (S. Watson) Kuntze	CHENOPODIACEAE	IODINE BUSH	native	
Allionia incarnata L.	NYCTAGINACEAE	TRAILING FOUR O'CLOCK; WINDMILLS	native	
Allionia incarnata L. var. incarnata	NYCTAGINACEAE		native	
Allionia incarnata L. var. villosa (Standl.) Munz	NYCTAGINACEAE		native	
Allium abramsii (Ownbey & Aase ex Traub) McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium acuminatum Hook.	ALLIACEAE	GARLIC; ONION	native	
Allium amplectens Torr.	ALLIACEAE	GARLIC; ONION	native	
Allium anceps Kellogg	ALLIACEAE	GARLIC; ONION	native	
Allium atrorubens S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium atrorubens S. Watson var. atrorubens	ALLIACEAE	GARLIC; ONION	native	
Allium atrorubens S. Watson var. cristatum (S. Watson) McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium bisceptrum S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium bolanderi S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium bolanderi S. Watson var. bolanderi	ALLIACEAE	GARLIC; ONION	native	
Allium bolanderi S. Watson var. mirabile (L. F. Hend.) McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium burlewii Davidson	ALLIACEAE	GARLIC; ONION	native	
Allium campanulatum S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium cratericola Eastw.	ALLIACEAE	GARLIC; ONION	native	
Allium crispum Greene	ALLIACEAE	GARLIC; ONION	native	
Allium denticulatum (Ownbey & Aase ex Traub) McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium diabolense (Ownbey & Aase ex Traub) McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium dichlamydeum Greene	ALLIACEAE	GARLIC; ONION	native	
Allium falcifolium Hook. & Arn.	ALLIACEAE	GARLIC; ONION	native	
Allium fimbriatum S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium fimbriatum S. Watson var. fimbriatum	ALLIACEAE	GARLIC; ONION	native	
Allium fimbriatum S. Watson var. mohavense Jeps.	ALLIACEAE	GARLIC; ONION	native	
Allium fimbriatum S. Watson var. purdyi (Eastw.) McNeal	ALLIACEAE	PURDY'S ONION	native	
Allium haematochiton S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium hickmanii Eastw.	ALLIACEAE	HICKMAN'S ONION	native	
Allium hoffmanii Ownbey ex Traub	ALLIACEAE	GARLIC; ONION	native	
Allium howellii Eastw.	ALLIACEAE	GARLIC; ONION	native	
Allium howellii Eastw. var. clokeyi Ownbey & Aase ex Traub	ALLIACEAE	GARLIC; ONION	native	
Allium howellii Eastw. var. howellii	ALLIACEAE	GARLIC; ONION	native	
Allium howellii Eastw. var. sanbenitense (Traub) McNeal & T. D. Jacobsen	ALLIACEAE	GARLIC; ONION	native	
Allium hyalinum Curran	ALLIACEAE	GARLIC; ONION	native	
Allium jepsonii (Ownbey & Aase ex Traub) S. Denison & McNeal	ALLIACEAE	JEPSON'S ONION	native	
Allium lacunosum S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium lacunosum S. Watson var. davisiae (M. E. Jones) McNeal & Ownbey	ALLIACEAE	GARLIC; ONION	native	
Allium lacunosum S. Watson var. kernense McNeal & Ownbey	ALLIACEAE	GARLIC; ONION	native	
Allium lacunosum S. Watson var. lacunosum	ALLIACEAE	GARLIC; ONION	native	
Allium lacunosum S. Watson var. micranthum Eastw.	ALLIACEAE	GARLIC; ONION	native	
Allium lemmonii S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium marvinii Davidson	ALLIACEAE		native	
Allium membranaceum Ownbey ex Traub	ALLIACEAE	GARLIC; ONION	native	
Allium monticola Davidson	ALLIACEAE	GARLIC; ONION	native	
Allium munzii (Ownbey & Aase ex Traub) McNeal	ALLIACEAE	MUNZ'S ONION	native	
Allium neapolitanum Cirillo	ALLIACEAE	GARLIC; ONION	naturalized	
Allium nevadense S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium obtusum Lemmon	ALLIACEAE	GARLIC; ONION	native	
Allium obtusum Lemmon var. conspicuum Mortola & McNeal	ALLIACEAE	GARLIC; ONION	native	
Allium obtusum Lemmon var. obtusum	ALLIACEAE	GARLIC; ONION	native	
Allium paniculatum L.	ALLIACEAE	GARLIC; ONION	naturalized	
Allium paniculatum L. var. paniculatum	ALLIACEAE	GARLIC; ONION	naturalized	
Allium parishii S. Watson	ALLIACEAE	PARISH'S ONION	native	
Allium parryi S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium parvum Kellogg	ALLIACEAE	GARLIC; ONION	native	
Allium peninsulare Lemmon ex Greene	ALLIACEAE	GARLIC; ONION	native	
Allium peninsulare Lemmon ex Greene var. franciscanum McNeal & Ownbey	ALLIACEAE	GARLIC; ONION	native	
Allium peninsulare Lemmon ex Greene var. peninsulare	ALLIACEAE	GARLIC; ONION	native	
Allium platycaule S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium praecox Brandegee	ALLIACEAE	GARLIC; ONION	native	
Allium punctum L. F. Hend.	ALLIACEAE	GARLIC; ONION	native	
Allium sanbornii A. W. Wood	ALLIACEAE	GARLIC; ONION	native	
Allium sanbornii A. W. Wood var. congdonii Jeps.	ALLIACEAE	CONGDON'S ONION	native	
Allium sanbornii A. W. Wood var. sanbornii	ALLIACEAE	SANBORN'S ONION	native	
Allium serra McNeal & Ownbey	ALLIACEAE	GARLIC; ONION	native	
Allium sharsmithiae (Ownbey & Aase ex Traub) McNeal	ALLIACEAE	SHARSMITH'S ONION	native	
Allium shevockii McNeal	ALLIACEAE	SPANISH NEEDLE ONION	native	
Allium siskiyouense Ownbey ex Traub	ALLIACEAE	SISKIYOU ONION	native	
Allium tolmiei Baker	ALLIACEAE	GARLIC; ONION	native	
Allium tolmiei Baker var. tolmiei	ALLIACEAE	GARLIC; ONION	native	
Allium tribracteatum Torr.	ALLIACEAE	THREE-BRACTED ONION	native	
Allium triquetrum L.	ALLIACEAE	GARLIC; ONION	naturalized	
Allium tuolumnense (Ownbey & Aase ex Traub) S. S. Denison & McNeal	ALLIACEAE	RAWHIDE HILL ONION	native	
Allium unifolium Kellogg	ALLIACEAE	GARLIC; ONION	native	
Allium validum S. Watson	ALLIACEAE	GARLIC; ONION	native	
Allium vineale L.	ALLIACEAE	GARLIC; ONION	naturalized	
Allium yosemitense Eastw.	ALLIACEAE	YOSEMITE ONION	native	
Allophyllum divaricatum (Nutt.) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Allophyllum gilioides (Benth.) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Allophyllum gilioides (Benth.) A. D. Grant & V. E. Grant subsp. gilioides	POLEMONIACEAE		native	
Allophyllum gilioides (Benth.) A. D. Grant & V. E. Grant subsp. violaceum (A. Heller) A. G. Day	POLEMONIACEAE		native	
Allophyllum glutinosum (Benth.) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Allophyllum integrifolium (Brand) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Allotropa virgata Torr. & A. Gray	ERICACEAE	SUGAR STICK	native	
Almutaster pauciflorus (Nutt.) Á. Löve & D. Löve	ASTERACEAE		native	
Alnus incana (L.) Moench	BETULACEAE	ALDER	native	
Alnus incana (L.) Moench subsp. tenuifolia (Nutt.) Breitung	BETULACEAE	MOUNTAIN ALDER	native	
Alnus rhombifolia Nutt.	BETULACEAE	WHITE ALDER	native	
Alnus rubra Bong.	BETULACEAE	RED ALDER	native	
Alnus viridis (Chaix) Lam. & DC.	BETULACEAE	ALDER	native	
Alnus viridis (Chaix) Lam. & DC. subsp. fruticosa (Rupr.) Nyman	BETULACEAE		native	
Alnus viridis (Chaix) Lam. & DC. subsp. sinuata (Regel) Á. Löve & D. Löve	BETULACEAE	SITKA ALDER; THINLEAF ALDER	native	
Alopecurus aequalis Sobol.	POACEAE	SHORT-AWN FOXTAIL	native	
Alopecurus carolinianus Walter	POACEAE	FOXTAIL	native	
Alopecurus geniculatus L.	POACEAE	WATER FOXTAIL	native	
Alopecurus myosuroides Huds.	POACEAE	FOXTAIL	naturalized	
Alopecurus pratensis L.	POACEAE	MEADOW FOXTAIL	naturalized	
Alopecurus saccatus Vasey	POACEAE	FOXTAIL	native	
Aloysia wrightii (A. Gray ex Torr.) Abrams	VERBENACEAE	OREGANILLO	native	
Alternanthera caracasana Kunth	AMARANTHACEAE		naturalized	
Alternanthera philoxeroides (Mart.) Griseb.	AMARANTHACEAE	ALLIGATOR WEED	naturalized	
Alyssum alyssoides (L.) L.	BRASSICACEAE		naturalized	
Alyssum desertorum Stapf	BRASSICACEAE		naturalized	
Alyssum simplex Rudolphi	BRASSICACEAE		naturalized	
Amaranthus albus L.	AMARANTHACEAE	TUMBLEWEED	naturalized	
Amaranthus arenicola I. M. Johnst.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus blitoides S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus californicus (Moq.) S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus caudatus L.	AMARANTHACEAE	QUILETE	naturalized	
Amaranthus cruentus L.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus deflexus L.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus fimbriatus (Torr.) Benth. ex S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus hybridus L.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus palmeri S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus powellii S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus powellii S. Watson subsp. bouchonii (Thell.) Costea & Carretero	AMARANTHACEAE		native	acceptance uncertain
Amaranthus powellii S. Watson subsp. powellii	AMARANTHACEAE		native	acceptance uncertain
Amaranthus retroflexus L.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus rudis J. D. Sauer	AMARANTHACEAE		naturalized	
Amaranthus spinosus L.	AMARANTHACEAE	AMARANTH; PIGWEED	naturalized	
Amaranthus torreyi (A. Gray) Benth. ex S. Watson	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaranthus viridis L.	AMARANTHACEAE		naturalized	acceptance uncertain
Amaranthus watsonii Standl.	AMARANTHACEAE	AMARANTH; PIGWEED	native	
Amaryllis belladonna L.	AMARYLLIDACEAE		naturalized	
Amauriopsis dissecta (A. Gray) Rydb.	ASTERACEAE		native	
Amblyopappus pusillus Hook. & Arn.	ASTERACEAE		native	
Ambrosia acanthicarpa Hook.	ASTERACEAE	ANNUAL BUR-SAGE	native	
Ambrosia ambrosioides (Cav.) Payne	ASTERACEAE	BUR-SAGE; RAGWEED	native	
Ambrosia artemisiifolia L.	ASTERACEAE	COMMON RAGWEED	naturalized	
Ambrosia chamissonis (Less.) Greene	ASTERACEAE	BEACH-BUR	native	
Ambrosia chenopodiifolia (Benth.) Payne	ASTERACEAE	SAN DIEGO BUR-SAGE	native	
Ambrosia confertiflora DC.	ASTERACEAE	BUR-SAGE; RAGWEED	native	
Ambrosia dumosa (A. Gray) Payne	ASTERACEAE	BURRO-WEED	native	
Ambrosia eriocentra (A. Gray) Payne	ASTERACEAE	WOOLLY BUR-SAGE	native	
Ambrosia ilicifolia (A. Gray) Payne	ASTERACEAE	BUR-SAGE; RAGWEED	native	
Ambrosia monogyra (A. Gray) Strother & B. G. Baldwin	ASTERACEAE		native	
Ambrosia psilostachya DC.	ASTERACEAE	WESTERN RAGWEED	native	
Ambrosia pumila (Nutt.) A. Gray	ASTERACEAE	SAN DIEGO AMBROSIA	native	
Ambrosia salsola (A. Gray) Strother & B. G. Baldwin	ASTERACEAE		native	
Ambrosia salsola (A. Gray) Strother & B. G. Baldwin var. fasciculata (A. Nelson) Strother & B. G. Baldwin	ASTERACEAE		native	
Ambrosia salsola (A. Gray) Strother & B. G. Baldwin var. pentalepis (Rydb.) Strother & B. G. Baldwin	ASTERACEAE		native	
Ambrosia salsola (A. Gray) Strother & B. G. Baldwin var. salsola	ASTERACEAE		native	
Ambrosia trifida L.	ASTERACEAE	GIANT RAGWEED	naturalized	
Ambrosia x platyspina (Seaman) Strother & B. G. Baldwin	ASTERACEAE		native	
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem.	ROSACEAE	SERVICE-BERRY	native	
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. var. pumila (Torr. & A. Gray) C. K. Schneid.	ROSACEAE	SERVICE-BERRY	native	
Amelanchier alnifolia (Nutt.) Nutt. ex M. Roem. var. semiintegrifolia (Hook.) C. L. Hitchc.	ROSACEAE	SERVICE-BERRY	native	
Amelanchier utahensis Koehne	ROSACEAE	UTAH SERVICE-BERRY	native	
Amelanchier utahensis Koehne var. covillei (Standl.) N. H. Holmgren	ROSACEAE		native	acceptance uncertain
Amelanchier utahensis Koehne var. utahensis	ROSACEAE		native	acceptance uncertain
Ammannia coccinea Rottb.	LYTHRACEAE		native	
Ammannia robusta Heer & Regel	LYTHRACEAE		native	
Ammi majus L.	APIACEAE		naturalized	
Ammi visnaga (L.) Lam.	APIACEAE	BISNAGA	naturalized	
Ammophila arenaria (L.) Link	POACEAE	EUROPEAN BEACHGRASS	naturalized	
Ammoselinum giganteum J. M. Coult. & Rose	APIACEAE	DESERT SAND-PARSLEY	native	
Amorpha californica Nutt.	FABACEAE	FALSE INDIGO	native	
Amorpha californica Nutt. var. californica	FABACEAE	FALSE INDIGO	native	
Amorpha californica Nutt. var. napensis Jeps.	FABACEAE	FALSE INDIGO	native	
Amorpha fruticosa L.	FABACEAE	FALSE INDIGO	native	
Ampelodesmos mauritanicus (Poir.) T. Durand & Schinz	POACEAE		naturalized	
Ampelopsis brevipedunculata (Maxim.) Trautv.	VITACEAE		naturalized	acceptance uncertain
Amphibromus neesii Steud.	POACEAE		naturalized	
Amphipappus fremontii Torr. & A. Gray	ASTERACEAE	CHAFF-BUSH	native	
Amphipappus fremontii Torr. & A. Gray var. fremontii	ASTERACEAE	CHAFF-BUSH	native	
Amphipappus fremontii Torr. & A. Gray var. spinosus (A. Nelson) Ced. Porter	ASTERACEAE	CHAFF-BUSH	native	
Amphiscirpus nevadensis (S. Watson) Oteng-Yeb.	CYPERACEAE		native	
Amsinckia douglasiana A. DC.	BORAGINACEAE	FIDDLENECK	native	
Amsinckia eastwoodiae J. F. Macbr.	BORAGINACEAE	FIDDLENECK	native	
Amsinckia grandiflora (A. Gray) Kleeb. ex Greene	BORAGINACEAE	LARGE-FLOWERED FIDDLENECK	native	
Amsinckia lunaris J. F. Macbr.	BORAGINACEAE	BENT-FLOWERED FIDDLENECK	native	
Amsinckia lycopsoides Lehm.	BORAGINACEAE	FIDDLENECK	native	
Amsinckia menziesii (Lehm.) A. Nelson & J. F. Macbr.	BORAGINACEAE	RANCHER'S FIREWEED	native	
Amsinckia menziesii (Lehm.) A. Nelson & J. F. Macbr. var. intermedia (Fisch. & C. A. Mey.) Ganders	BORAGINACEAE	FIDDLENECK	native	
Amsinckia menziesii (Lehm.) A. Nelson & J. F. Macbr. var. menziesii	BORAGINACEAE	FIDDLENECK	native	
Amsinckia spectabilis Fisch. & C. A. Mey.	BORAGINACEAE	FIDDLENECK	native	
Amsinckia spectabilis Fisch. & C. A. Mey. var. microcarpa (Greene) Jeps. & Hoover	BORAGINACEAE	FIDDLENECK	native	
Amsinckia spectabilis Fisch. & C. A. Mey. var. spectabilis	BORAGINACEAE	FIDDLENECK	native	
Amsinckia tessellata A. Gray	BORAGINACEAE	DEVIL'S LETTUCE	native	
Amsinckia tessellata A. Gray var. gloriosa (Suksd.) Hoover	BORAGINACEAE	FIDDLENECK	native	
Amsinckia tessellata A. Gray var. tessellata	BORAGINACEAE	FIDDLENECK	native	
Amsinckia vernicosa Hook. & Arn.	BORAGINACEAE	FIDDLENECK	native	
Amsinckia vernicosa Hook. & Arn. var. furcata (Suksd.) Hoover ex Jeps.	BORAGINACEAE	FORKED FIDDLENECK	native	
Amsinckia vernicosa Hook. & Arn. var. vernicosa	BORAGINACEAE	FIDDLENECK	native	
Amsonia tomentosa Torr. & Frém.	APOCYNACEAE		native	
Anagallis arvensis L.	MYRSINACEAE	POOR-MAN'S WEATHERGLASS; SCARLET PIMPERNEL	naturalized	
Anagallis minima (L.) E. H. L. Krause	MYRSINACEAE		native	
Anaphalis margaritacea (L.) Benth.	ASTERACEAE	PEARLY EVERLASTING	native	
Anchusa arvensis (L.) M. Bieb.	BORAGINACEAE	ALKANET; BUGLOSS	naturalized	
Anchusa azurea Mill.	BORAGINACEAE	ALKANET; BUGLOSS	naturalized	
Anchusa officinalis L.	BORAGINACEAE	ALKANET; BUGLOSS	naturalized	
Ancistrocarphus filagineus A. Gray	ASTERACEAE	WOOLLY FISHHOOKS	native	
Ancistrocarphus keilii Morefield	ASTERACEAE		native	
Andropogon glomeratus (Walter) Britton, Sterns & Poggenb.	POACEAE	BLUESTEM	native	
Andropogon glomeratus (Walter) Britton, Sterns & Poggenb. var. scabriglumis C. S. Campb.	POACEAE	SOUTHWESTERN BUSHY BLUESTEM	native	
Andropogon virginicus L.	POACEAE	BLUESTEM	naturalized	
Andropogon virginicus L. var. virginicus	POACEAE	BROOMSEDGE BLUESTEM	naturalized	
Androsace elongata L.	PRIMULACEAE	FAIRY-CANDELABRA; ROCK-JASMINE	native	
Androsace elongata L. subsp. acuta (Greene) G. T. Robbins	PRIMULACEAE	FAIRY-CANDELABRA; ROCK-JASMINE	native	
Androsace filiformis Retz.	PRIMULACEAE	SLENDER-STEMMED ANDROSACE	native	
Androsace occidentalis Pursh	PRIMULACEAE	FAIRY-CANDELABRA; ROCK-JASMINE	native	
Androsace septentrionalis L.	PRIMULACEAE	FAIRY-CANDELABRA; ROCK-JASMINE	native	
Androstephium breviflorum S. Watson	LILIACEAE		native	
Anelsonia eurycarpa (A. Gray) J. F. Macbr. & Payson	BRASSICACEAE		native	
Anemone deltoidea Hook.	RANUNCULACEAE	ANEMONE	native	
Anemone drummondii S. Watson	RANUNCULACEAE	ANEMONE	native	
Anemone multifida Poir.	RANUNCULACEAE	GLOBE ANEMONE	native	
Anemone occidentalis S. Watson	RANUNCULACEAE	ANEMONE	native	
Anemone oregana A. Gray	RANUNCULACEAE	ANEMONE	native	
Anemone tuberosa Rydb.	RANUNCULACEAE	ANEMONE	native	
Anemopsis californica (Nutt.) Hook. & Arn.	SAURURACEAE	YERBA MANSA	native	
Anethum graveolens L.	APIACEAE	DILL	naturalized	
Angelica arguta Nutt.	APIACEAE	ANGELICA	native	
Angelica breweri A. Gray	APIACEAE		native	
Angelica californica Jeps.	APIACEAE		native	
Angelica callii Mathias & Constance	APIACEAE	CALL'S ANGELICA	native	
Angelica genuflexa Nutt.	APIACEAE		native	
Angelica hendersonii J. M. Coult. & Rose	APIACEAE		native	
Angelica kingii (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Angelica lineariloba A. Gray	APIACEAE		native	
Angelica lucida L.	APIACEAE		native	
Angelica tomentosa S. Watson	APIACEAE		native	
Anisocarpus madioides Nutt.	ASTERACEAE		native	
Anisocarpus scabridus (Eastw.) B. G. Baldwin	ASTERACEAE		native	
Anisocoma acaulis Torr. & A. Gray	ASTERACEAE	SCALE BUD	native	
Anoda cristata (L.) Schltdl.	MALVACEAE	VIOLETTAS	naturalized	
Antennaria argentea Benth.	ASTERACEAE	PUSSY-TOES	native	
Antennaria corymbosa E. E. Nelson	ASTERACEAE	PUSSY-TOES	native	
Antennaria dimorpha (Nutt.) Torr. & A. Gray	ASTERACEAE	PUSSY-TOES	native	
Antennaria flagellaris (A. Gray) A. Gray	ASTERACEAE	STOLONIFEROUS PUSSY-TOES	native	
Antennaria geyeri A. Gray	ASTERACEAE	PUSSY-TOES	native	
Antennaria howellii Greene	ASTERACEAE	PUSSY-TOES	native	
Antennaria howellii Greene subsp. howellii	ASTERACEAE	PUSSY-TOES	native	
Antennaria lanata (Hook.) Greene	ASTERACEAE		native	
Antennaria luzuloides Torr. & A. Gray	ASTERACEAE	PUSSY-TOES	native	
Antennaria luzuloides Torr. & A. Gray subsp. aberrans (E. E. Nelson) R. J. Bayer & Stebbins	ASTERACEAE		native	
Antennaria luzuloides Torr. & A. Gray subsp. luzuloides	ASTERACEAE		native	
Antennaria marginata Greene	ASTERACEAE	PUSSY-TOES	native	
Antennaria media Greene	ASTERACEAE	PUSSY-TOES	native	
Antennaria pulchella Greene	ASTERACEAE	BEAUTIFUL PUSSY-TOES	native	
Antennaria racemosa Hook.	ASTERACEAE	PUSSY-TOES	native	
Antennaria rosea Greene	ASTERACEAE	PUSSY-TOES	native	
Antennaria rosea Greene subsp. confinis (Greene) R. J. Bayer	ASTERACEAE	PUSSY-TOES	native	
Antennaria rosea Greene subsp. rosea	ASTERACEAE	PUSSY-TOES	native	
Antennaria suffrutescens Greene	ASTERACEAE	EVERGREEN EVERLASTING	native	
Antennaria umbrinella Rydb.	ASTERACEAE	PUSSY-TOES	native	
Anthemis arvensis L.	ASTERACEAE	CORN CHAMOMILE	naturalized	
Anthemis cotula L.	ASTERACEAE	DOG-FENNEL; MAYWEED; STINKWEED	naturalized	
Anthemis tinctoria L.	ASTERACEAE	GOLDEN MARGUERITE	naturalized	
Anthoxanthum aristatum Boiss.	POACEAE	VERNAL GRASS	naturalized	
Anthoxanthum odoratum L.	POACEAE	SWEET VERNAL GRASS	naturalized	
Anthriscus caucalis M. Bieb.	APIACEAE	BUR-CHERVIL	naturalized	
Antirrhinum cornutum Benth.	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum coulterianum Benth. ex A. DC.	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum cyathiferum Benth.	PLANTAGINACEAE	DEEP CANYON SNAPDRAGON	native	
Antirrhinum filipes A. Gray	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum kelloggii Greene	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum kingii S. Watson	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum leptaleum A. Gray	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum majus L.	PLANTAGINACEAE	SNAPDRAGON	naturalized	
Antirrhinum multiflorum Pennell	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum nuttallianum Benth. ex A. DC.	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum nuttallianum Benth. ex A. DC. subsp. nuttallianum	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum nuttallianum Benth. ex A. DC. subsp. subsessile (A. Gray) D. M. Thomps.	PLANTAGINACEAE	SNAPDRAGON	native	
Antirrhinum orontium L.	PLANTAGINACEAE	SNAPDRAGON	naturalized	
Antirrhinum ovatum Eastw.	PLANTAGINACEAE	OVAL-LEAVED SNAPDRAGON	native	
Antirrhinum subcordatum A. Gray	PLANTAGINACEAE	DIMORPHIC SNAPDRAGON	native	
Antirrhinum vexillocalyculatum Kellogg	PLANTAGINACEAE		native	
Antirrhinum vexillocalyculatum Kellogg subsp. breweri (A. Gray) D. M. Thomps.	PLANTAGINACEAE		native	
Antirrhinum vexillocalyculatum Kellogg subsp. intermedium D. M. Thomps.	PLANTAGINACEAE		native	
Antirrhinum vexillocalyculatum Kellogg subsp. vexillocalyculatum	PLANTAGINACEAE		native	
Antirrhinum virga A. Gray	PLANTAGINACEAE	TALL SNAPDRAGON	native	
Anulocaulis annulatus (Coville) Standl.	NYCTAGINACEAE	RINGSTEM	native	
Apera interrupta (L.) P. Beauv.	POACEAE		naturalized	
Apera spica-venti (L.) P. Beauv.	POACEAE		naturalized	
Aphanes occidentalis (Nutt.) Rydb.	ROSACEAE		native	
Aphanisma blitoides Moq.	CHENOPODIACEAE	APHANISMA	native	
Apiastrum angustifolium Nutt.	APIACEAE		native	
Apium graveolens L.	APIACEAE	CELERY	naturalized	
Apium nodiflorum (L.) Lag.	APIACEAE		naturalized	
Apocynum androsaemifolium L.	APOCYNACEAE	BITTER DOGBANE	native	
Apocynum cannabinum L.	APOCYNACEAE	INDIAN HEMP	native	
Aponogeton distachyos L. f.	APONOGETONACEAE		naturalized	
Aptenia cordifolia (L. f.) Schwantes	AIZOACEAE	BABY SUN ROSE	naturalized	acceptance uncertain
Aquilegia eximia Planch.	RANUNCULACEAE	COLUMBINE	native	
Aquilegia formosa Fisch. ex DC.	RANUNCULACEAE	COLUMBINE	native	
Aquilegia pubescens Coville	RANUNCULACEAE	COLUMBINE	native	
Arabidopsis thaliana (L.) Heynh.	BRASSICACEAE	MOUSE-EAR CRESS; THALE CRESS	naturalized	
Arabis aculeolata Greene	BRASSICACEAE	WALDO ROCK CRESS	native	
Arabis blepharophylla Hook. & Arn.	BRASSICACEAE	COAST ROCK CRESS	native	
Arabis bodiensis Rollins	BRASSICACEAE	BODIE HILLS ROCK CRESS	native	
Arabis breweri S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis breweri S. Watson var. austiniae (Greene) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis breweri S. Watson var. breweri	BRASSICACEAE	ROCK CRESS	native	
Arabis breweri S. Watson var. pecuniaria Rollins	BRASSICACEAE	SAN BERNARDINO ROCK CRESS	native	
Arabis cobrensis M. E. Jones	BRASSICACEAE	MASONIC ROCK CRESS	native	
Arabis constancei Rollins	BRASSICACEAE	CONSTANCE'S ROCK CRESS	native	
Arabis davidsonii Greene	BRASSICACEAE	ROCK CRESS	native	
Arabis dispar M. E. Jones	BRASSICACEAE	ROCK CRESS	native	
Arabis drummondii A. Gray	BRASSICACEAE	ROCK CRESS	native	
Arabis fernaldiana Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis fernaldiana Rollins var. stylosa (S. Watson) Rollins	BRASSICACEAE	STYLOSE ROCK CRESS	native	
Arabis glabra (L.) Bernh.	BRASSICACEAE	ROCK CRESS	native	
Arabis glabra (L.) Bernh. var. furcatipilis M. Hopkins	BRASSICACEAE	ROCK CRESS	native	
Arabis glabra (L.) Bernh. var. glabra	BRASSICACEAE	ROCK CRESS	native	
Arabis glaucovalvula M. E. Jones	BRASSICACEAE	ROCK CRESS	native	
Arabis hirsuta (L.) Scop.	BRASSICACEAE	ROCK CRESS	native	
Arabis hirsuta (L.) Scop. var. glabrata Torr. & A. Gray	BRASSICACEAE	ROCK CRESS	native	
Arabis hirsuta (L.) Scop. var. pycnocarpa (M. Hopkins) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis hoffmannii (Munz) Rollins	BRASSICACEAE	HOFFMAN'S ROCK CRESS	native	
Arabis holboellii Hornem.	BRASSICACEAE	ROCK CRESS	native	
Arabis holboellii Hornem. var. pinetorum (Tidestr.) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis holboellii Hornem. var. retrofracta (Graham) Rydb.	BRASSICACEAE	ROCK CRESS	native	
Arabis inyoensis Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis johnstonii Munz	BRASSICACEAE	JOHNSTON'S ROCK CRESS	native	
Arabis koehleri Howell	BRASSICACEAE	ROCK CRESS	native	
Arabis koehleri Howell var. stipitata Rollins	BRASSICACEAE	KOEHLER'S STIPITATE ROCK CRESS	native	
Arabis lemmonii S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis lemmonii S. Watson var. depauperata (A. Nelson & P. B. Kenn.) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis lemmonii S. Watson var. lemmonii	BRASSICACEAE	ROCK CRESS	native	
Arabis lyallii S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis lyallii S. Watson var. lyallii	BRASSICACEAE	ROCK CRESS	native	
Arabis lyallii S. Watson var. nubigena (J. F. Macbr. & Payson) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis macdonaldiana Eastw.	BRASSICACEAE	MCDONALD'S ROCK CRESS	native	
Arabis modesta Rollins	BRASSICACEAE	MODEST ROCK CRESS	native	
Arabis oregana Rollins	BRASSICACEAE	OREGON ROCK CRESS	native	
Arabis parishii S. Watson	BRASSICACEAE	PARISH'S ROCK CRESS	native	
Arabis pendulina Greene	BRASSICACEAE		native	
Arabis perennans S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis pinzliae Rollins	BRASSICACEAE	PINZL'S ROCK CRESS	native	
Arabis platysperma A. Gray	BRASSICACEAE	ROCK CRESS	native	
Arabis platysperma A. Gray var. howellii (S. Watson) Jeps.	BRASSICACEAE	ROCK CRESS	native	
Arabis platysperma A. Gray var. platysperma	BRASSICACEAE	ROCK CRESS	native	
Arabis puberula Nutt.	BRASSICACEAE	ROCK CRESS	native	
Arabis pulchra M. E. Jones ex S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis pulchra M. E. Jones ex S. Watson var. gracilis M. E. Jones	BRASSICACEAE	ROCK CRESS	native	
Arabis pulchra M. E. Jones ex S. Watson var. munciensis M. E. Jones	BRASSICACEAE	DARWIN ROCK CRESS	native	
Arabis pulchra M. E. Jones ex S. Watson var. pulchra	BRASSICACEAE	ROCK CRESS	native	
Arabis pygmaea Rollins	BRASSICACEAE	TULARE COUNTY ROCK CRESS	native	
Arabis rectissima Greene	BRASSICACEAE	ROCK CRESS	native	
Arabis rectissima Greene var. rectissima	BRASSICACEAE	ROCK CRESS	native	
Arabis repanda S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis repanda S. Watson var. greenei Jeps.	BRASSICACEAE	ROCK CRESS	native	
Arabis repanda S. Watson var. repanda	BRASSICACEAE	ROCK CRESS	native	
Arabis rigidissima Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis rigidissima Rollins var. rigidissima	BRASSICACEAE	TRINITY MOUNTAINS ROCK CRESS	native	
Arabis rollei Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis shockleyi Munz	BRASSICACEAE	SHOCKLEY'S ROCK CRESS	native	
Arabis sparsiflora Nutt.	BRASSICACEAE	ROCK CRESS	native	
Arabis sparsiflora Nutt. var. arcuata (Nutt.) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis sparsiflora Nutt. var. californica Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis sparsiflora Nutt. var. sparsiflora	BRASSICACEAE	ROCK CRESS	native	
Arabis sparsiflora Nutt. var. subvillosa (S. Watson) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis subpinnatifida S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis suffrutescens S. Watson	BRASSICACEAE	ROCK CRESS	native	
Arabis suffrutescens S. Watson var. horizontalis (Greene) Rollins	BRASSICACEAE	ROCK CRESS	native	
Arabis suffrutescens S. Watson var. suffrutescens	BRASSICACEAE	ROCK CRESS	native	
Arabis tiehmii Rollins	BRASSICACEAE	TIEHM'S ROCK CRESS	native	
Aralia californica S. Watson	ARALIACEAE	ELK CLOVER	native	
Araujia sericifera Brot.	APOCYNACEAE	BLADDER-FLOWER	naturalized	
Arbutus menziesii Pursh	ERICACEAE	PACIFIC MADRONE	native	
Arceuthobium americanum Nutt. ex Engelm.	VISCACEAE	LODGEPOLE-PINE DWARF MISTLETOE	native	
Arceuthobium campylopodum Engelm.	VISCACEAE	WESTERN DWARF MISTLETOE	native	
Arceuthobium douglasii Engelm.	VISCACEAE	DOUGLAS-FIR DWARF MISTLETOE	native	
Arctium lappa L.	ASTERACEAE	BURDOCK	naturalized	
Arctium minus (Hill) Bernh.	ASTERACEAE	BURDOCK	naturalized	
Arctomecon merriamii Coville	PAPAVERACEAE	WHITE BEAR POPPY	native	
Arctostaphylos andersonii A. Gray	ERICACEAE	SANTA CRUZ MANZANITA	native	
Arctostaphylos auriculata Eastw.	ERICACEAE	MOUNT DIABLO MANZANITA	native	
Arctostaphylos bakeri Eastw.	ERICACEAE	MANZANITA	native	
Arctostaphylos bakeri Eastw. subsp. bakeri	ERICACEAE	BAKER'S MANZANITA	native	
Arctostaphylos bakeri Eastw. subsp. sublaevis P. V. Wells	ERICACEAE	THE CEDARS MANZANITA	native	
Arctostaphylos canescens Eastw.	ERICACEAE	MANZANITA	native	
Arctostaphylos canescens Eastw. subsp. canescens	ERICACEAE	MANZANITA	native	
Arctostaphylos canescens Eastw. subsp. sonomensis (Eastw.) P. V. Wells	ERICACEAE	SONOMA MANZANITA	native	
Arctostaphylos catalinae P. V. Wells	ERICACEAE	SANTA CATALINA ISLAND MANZANITA	native	
Arctostaphylos columbiana Piper	ERICACEAE	MANZANITA	native	
Arctostaphylos confertiflora Eastw.	ERICACEAE	SANTA ROSA ISLAND MANZANITA	native	
Arctostaphylos cruzensis Roof	ERICACEAE	LA CRUZ MANZANITA	native	
Arctostaphylos densiflora Baker	ERICACEAE	VINE HILL MANZANITA	native	
Arctostaphylos edmundsii J. T. Howell	ERICACEAE	LITTLE SUR MANZANITA	native	
Arctostaphylos gabilanensis V. T. Parker & M. C. Vasey	ERICACEAE		native	
Arctostaphylos gabrielensis P. V. Wells	ERICACEAE	SAN GABRIEL MANZANITA	native	
Arctostaphylos glandulosa Eastw.	ERICACEAE	MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. adamsii (Munz) Munz	ERICACEAE	MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. crassifolia (Jeps.) P. V. Wells	ERICACEAE	COSTA BAJA MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. glandulosa	ERICACEAE	MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. glaucomollis P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. leucophylla J. E. Keeley, M. C. Vasey & V. T. Parker	ERICACEAE		native	
Arctostaphylos glandulosa Eastw. subsp. mollis (J. E. Adams) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos glandulosa Eastw. subsp. zacaensis (Eastw.) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos glauca Lindl.	ERICACEAE	MANZANITA	native	
Arctostaphylos glutinosa B. Schreib.	ERICACEAE	SCHREIBER'S MANZANITA	native	
Arctostaphylos hispidula Howell	ERICACEAE	HOWELL'S MANZANITA	native	
Arctostaphylos hookeri G. Don	ERICACEAE	MANZANITA	native	
Arctostaphylos hookeri G. Don subsp. hearstiorum (Hoover & Roof) P. V. Wells	ERICACEAE	THE HEARSTS' MANZANITA	native	
Arctostaphylos hookeri G. Don subsp. hookeri	ERICACEAE	HOOKER'S MANZANITA	native	
Arctostaphylos hookeri G. Don subsp. montana (Eastw.) P. V. Wells	ERICACEAE	TAMALPAIS MANZANITA	native	
Arctostaphylos hookeri G. Don subsp. ravenii P. V. Wells	ERICACEAE	PRESIDIO MANZANITA	native	
Arctostaphylos hooveri P. V. Wells	ERICACEAE	HOOVER'S MANZANITA	native	
Arctostaphylos imbricata Eastw.	ERICACEAE	SAN BRUNO MOUNTAIN MANZANITA	native	
Arctostaphylos insularis Greene ex Parry	ERICACEAE	MANZANITA	native	
Arctostaphylos klamathensis S. W. Edwards, Keeler-Wolf & W. Knight	ERICACEAE	KLAMATH MANZANITA	native	
Arctostaphylos luciana P. V. Wells	ERICACEAE	SANTA LUCIA MANZANITA	native	
Arctostaphylos malloryi (W. Knight & Gankin) P. V. Wells	ERICACEAE	MALLORY'S MANZANITA	native	
Arctostaphylos manzanita Parry	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. elegans (Jeps.) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. glaucescens P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. laevigata (Eastw.) Munz	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. manzanita	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. roofii (Gankin) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos manzanita Parry subsp. wieslanderi P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos mendocinoensis P. V. Wells	ERICACEAE	PYGMY MANZANITA	native	
Arctostaphylos mewukka Merriam	ERICACEAE	MANZANITA	native	
Arctostaphylos mewukka Merriam subsp. mewukka	ERICACEAE	MANZANITA	native	
Arctostaphylos mewukka Merriam subsp. truei (W. Knight) P. V. Wells	ERICACEAE	TRUE'S MANZANITA	native	
Arctostaphylos montaraensis Roof	ERICACEAE	MONTARA MANZANITA	native	
Arctostaphylos montereyensis Hoover	ERICACEAE	MONTEREY MANZANITA	native	
Arctostaphylos morroensis Wiesl. & B. Schreib.	ERICACEAE	MORRO MANZANITA	native	
Arctostaphylos myrtifolia Parry	ERICACEAE	IONE MANZANITA	native	
Arctostaphylos nevadensis A. Gray	ERICACEAE	MANZANITA	native	
Arctostaphylos nissenana Merriam	ERICACEAE	NISSENAN MANZANITA	native	
Arctostaphylos nortensis (P. V. Wells) P. V. Wells	ERICACEAE	DEL NORTE MANZANITA	native	
Arctostaphylos nummularia A. Gray	ERICACEAE	MANZANITA	native	
Arctostaphylos obispoensis Eastw.	ERICACEAE	BISHOP MANZANITA	native	
Arctostaphylos ohloneana M. C. Vasey & V. T. Parker	ERICACEAE		native	
Arctostaphylos osoensis P. V. Wells	ERICACEAE	OSO MANZANITA	native	
Arctostaphylos otayensis Wiesl. & B. Schreib.	ERICACEAE	OTAY MANZANITA	native	
Arctostaphylos pajaroensis J. E. Adams	ERICACEAE	PAJARO MANZANITA	native	
Arctostaphylos pallida Eastw.	ERICACEAE	PALLID MANZANITA	native	
Arctostaphylos parryana Lemmon	ERICACEAE	MANZANITA	native	
Arctostaphylos parryana Lemmon subsp. deserticum J. E. Keeley, L. M. Boykin & Massihi	ERICACEAE		native	acceptance uncertain
Arctostaphylos parryana Lemmon subsp. parryana	ERICACEAE		native	acceptance uncertain
Arctostaphylos parryana Lemmon subsp. tumescens J. E. Keeley, L. M. Boykin & Massihi	ERICACEAE		native	acceptance uncertain
Arctostaphylos patula Greene	ERICACEAE	MANZANITA	native	
Arctostaphylos pechoensis (Abrams) Dudley ex Eastw.	ERICACEAE	PECHO MANZANITA	native	
Arctostaphylos pilosula Jeps. & Wiesl.	ERICACEAE	SANTA MARGARITA MANZANITA	native	
Arctostaphylos pringlei Parry	ERICACEAE	MANZANITA	native	
Arctostaphylos pringlei Parry subsp. drupacea (Parry) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos pumila Nutt.	ERICACEAE	SANDMAT MANZANITA	native	
Arctostaphylos pungens Kunth	ERICACEAE	MANZANITA	native	
Arctostaphylos purissima P. V. Wells	ERICACEAE	LA PURISIMA MANZANITA	native	
Arctostaphylos rainbowensis J. E. Keeley & Massihi	ERICACEAE		native	acceptance uncertain
Arctostaphylos refugioensis Gankin	ERICACEAE	REFUGIO MANZANITA	native	
Arctostaphylos regismontana Eastw.	ERICACEAE	MANZANITA	native	
Arctostaphylos rudis Jeps. & Wiesl.	ERICACEAE	SAND MESA MANZANITA	native	
Arctostaphylos silvicola Jeps. & Wiesl.	ERICACEAE	BONNIE DOON MANZANITA	native	
Arctostaphylos stanfordiana Parry	ERICACEAE	MANZANITA	native	
Arctostaphylos stanfordiana Parry subsp. decumbens (P. V. Wells) P. V. Wells	ERICACEAE	RINCON MANZANITA	native	
Arctostaphylos stanfordiana Parry subsp. raichei W. Knight	ERICACEAE	RAICHE'S MANZANITA	native	
Arctostaphylos stanfordiana Parry subsp. stanfordiana	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl.	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. bracteosa (DC.) J. E. Adams	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. crinita (J. E. Adams) Gankin	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. crustacea (Eastw.) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. daciticola P. V. Wells	ERICACEAE	DACITE MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. eastwoodiana P. V. Wells	ERICACEAE	EASTWOOD'S MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. insulicola P. V. Wells	ERICACEAE	ISLAND LOVING MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. rosei (Eastw.) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. subcordata (Eastw.) P. V. Wells	ERICACEAE	SUBCORDATE MANZANITA	native	
Arctostaphylos tomentosa (Pursh) Lindl. subsp. tomentosa	ERICACEAE	MANZANITA	native	
Arctostaphylos uva-ursi (L.) Spreng.	ERICACEAE	BEARBERRY	native	
Arctostaphylos virgata Eastw.	ERICACEAE	MARIN MANZANITA	native	
Arctostaphylos viridissima (Eastw.) McMinn	ERICACEAE	MCMINN'S MANZANITA	native	
Arctostaphylos viscida Parry	ERICACEAE	MANZANITA	native	
Arctostaphylos viscida Parry subsp. mariposa (Dudley) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos viscida Parry subsp. pulchella (Howell) P. V. Wells	ERICACEAE	MANZANITA	native	
Arctostaphylos viscida Parry subsp. viscida	ERICACEAE	MANZANITA	native	
Arctostaphylos wellsii W. Knight	ERICACEAE	WELLS' MANZANITA	native	
Arctotheca calendula (L.) Levyns	ASTERACEAE	CAPEWEED	naturalized	
Arctotis venusta Norl.	ASTERACEAE		naturalized	
Arenaria lanuginosa (Michx.) Rohrb.	CARYOPHYLLACEAE	SANDWORT	native	
Arenaria lanuginosa (Michx.) Rohrb. var. saxosa (A. Gray) Zarucchi, R. L. Hartm., & Rabeler	CARYOPHYLLACEAE		native	
Arenaria paludicola B. L. Rob.	CARYOPHYLLACEAE	MARSH SANDWORT	native	
Arenaria serpyllifolia L.	CARYOPHYLLACEAE	SANDWORT	naturalized	
Arenaria serpyllifolia L. var. serpyllifolia	CARYOPHYLLACEAE		naturalized	
Argemone corymbosa Greene	PAPAVERACEAE	PRICKLY POPPY	native	
Argemone munita Durand & Hilg.	PAPAVERACEAE	CHICALOTE	native	
Argyranthemum foeniculaceum (Willd.) Sch. Bip.	ASTERACEAE		naturalized	
Argyrochosma jonesii (Maxon) Windham	PTERIDACEAE		native	
Argyrochosma limitanea (Maxon) Windham	PTERIDACEAE		native	
Argyrochosma limitanea (Maxon) Windham subsp. limitanea	PTERIDACEAE		native	
Arida arizonica (R. C. Jacks. & R. R. Johnson) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Arida carnosa (A. Gray) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Aristida adscensionis L.	POACEAE	SIX-WEEKS THREE-AWN	native	
Aristida californica Thurb.	POACEAE	THREE-AWN	native	
Aristida californica Thurb. var. californica	POACEAE	CALIFORNIA THREE-AWN	native	
Aristida dichotoma Michx.	POACEAE		naturalized	
Aristida divaricata Humb. & Bonpl. ex Willd.	POACEAE	POVERTY THREE-AWN	native	
Aristida oligantha Michx.	POACEAE	OLDFIELD THREE-AWN	native	
Aristida purpurea Nutt.	POACEAE	THREE-AWN	native	
Aristida purpurea Nutt. var. fendleriana (Steud.) Vasey	POACEAE	FENDLER THREE-AWN	native	
Aristida purpurea Nutt. var. longiseta (Steud.) Vasey	POACEAE	RED THREE-AWN	native	
Aristida purpurea Nutt. var. nealleyi (Vasey) Allred	POACEAE	NEALLEY THREE-AWN	native	
Aristida purpurea Nutt. var. parishii (Hitchc.) Allred	POACEAE	PARISH THREE-AWN	native	
Aristida purpurea Nutt. var. purpurea	POACEAE	PURPLE THREE-AWN	native	
Aristida purpurea Nutt. var. wrightii (Nash) Allred	POACEAE	WRIGHT THREE-AWN	native	
Aristida ternipes Cav.	POACEAE	THREE-AWN	native	
Aristida ternipes Cav. var. gentilis (Henrard) Allred	POACEAE		native	
Aristocapsa insignis (Curran) Reveal & Hardham	POLYGONACEAE	INDIAN VALLEY SPINEFLOWER	native	
Aristolochia californica Torr.	ARISTOLOCHIACEAE	BIRTHWORT; PIPEVINE	native	
Armeria maritima (Mill.) Willd.	PLUMBAGINACEAE	SEA-PINK; THRIFT	native	
Armeria maritima (Mill.) Willd. subsp. californica (Boiss.) A. E. Porsild	PLUMBAGINACEAE	SEA-PINK; THRIFT	native	
Armoracia rusticana P. Gaertn., B. Mey. & Scherb.	BRASSICACEAE	HORSERADISH	naturalized	
Arnica amplexicaulis Nutt.	ASTERACEAE		native	
Arnica cernua Howell	ASTERACEAE	SERPENTINE ARNICA	native	
Arnica chamissonis Less.	ASTERACEAE		native	
Arnica chamissonis Less. subsp. foliosa (Nutt.) Maguire	ASTERACEAE		native	
Arnica cordifolia Hook.	ASTERACEAE		native	
Arnica dealbata (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Arnica discoidea Benth.	ASTERACEAE		native	
Arnica fulgens Pursh	ASTERACEAE	HILLSIDE ARNICA	native	
Arnica latifolia Bong.	ASTERACEAE		native	
Arnica longifolia D. C. Eaton	ASTERACEAE		native	
Arnica mollis Hook.	ASTERACEAE		native	
Arnica nevadensis A. Gray	ASTERACEAE		native	
Arnica parryi A. Gray	ASTERACEAE		native	
Arnica sororia Greene	ASTERACEAE	TWIN ARNICA	native	
Arnica spathulata Greene	ASTERACEAE	KLAMATH ARNICA	native	
Arnica tomentella Greene	ASTERACEAE		native	
Arnica venosa H. M. Hall	ASTERACEAE	SHASTA COUNTY ARNICA	native	
Arnica viscosa A. Gray	ASTERACEAE	MOUNT SHASTA ARNICA	native	
Arrhenatherum elatius (L.) J. Presl & C. Presl	POACEAE		naturalized	
Artemisia absinthium L.	ASTERACEAE		naturalized	acceptance uncertain
Artemisia annua L.	ASTERACEAE	SWEET ANNIE	naturalized	
Artemisia arbuscula Nutt.	ASTERACEAE	LOW SAGEBRUSH	native	
Artemisia arbuscula Nutt. subsp. arbuscula	ASTERACEAE	SAGEBRUSH	native	
Artemisia arbuscula Nutt. subsp. longiloba (Osterh.) L. M. Shultz	ASTERACEAE		native	
Artemisia arbuscula Nutt. subsp. thermopola Beetle	ASTERACEAE	SAGEBRUSH	native	
Artemisia biennis Willd.	ASTERACEAE	SAGEBRUSH	naturalized	
Artemisia bigelovii A. Gray	ASTERACEAE	BIGELOW SAGEBRUSH	native	
Artemisia borealis Pall.	ASTERACEAE		native	
Artemisia californica Less.	ASTERACEAE	CALIFORNIA SAGEBRUSH	native	
Artemisia campestris L.	ASTERACEAE	SAGEBRUSH	native	
Artemisia campestris L. var. scouleriana (Hook.) Cronquist	ASTERACEAE		native	acceptance uncertain
Artemisia cana Pursh	ASTERACEAE	SAGEBRUSH	native	
Artemisia cana Pursh subsp. bolanderi (A. Gray) G. H. Ward	ASTERACEAE	SILVER SAGEBRUSH	native	
Artemisia douglasiana Besser	ASTERACEAE	MUGWORT	native	
Artemisia dracunculus L.	ASTERACEAE	TARRAGON	native	
Artemisia ludoviciana Nutt.	ASTERACEAE	SILVER WORMWOOD	native	
Artemisia ludoviciana Nutt. subsp. albula (Wooton) D. D. Keck	ASTERACEAE	SAGEBRUSH	native	
Artemisia ludoviciana Nutt. subsp. candicans (Rydb.) D. D. Keck	ASTERACEAE	SAGEBRUSH	native	
Artemisia ludoviciana Nutt. subsp. incompta (Nutt.) D. D. Keck	ASTERACEAE	SAGEBRUSH	native	
Artemisia ludoviciana Nutt. subsp. ludoviciana	ASTERACEAE	SAGEBRUSH	native	
Artemisia michauxiana Besser	ASTERACEAE	LEMON SAGEWORT	native	
Artemisia nesiotica P. H. Raven	ASTERACEAE	ISLAND SAGEBRUSH	native	
Artemisia norvegica Fr.	ASTERACEAE	SAGEBRUSH	native	
Artemisia norvegica Fr. subsp. saxatilis (Besser) H. M. Hall & Clem.	ASTERACEAE	BOREAL SAGEWORT	native	
Artemisia nova A. Nelson	ASTERACEAE	BLACK SAGEBRUSH	native	
Artemisia palmeri A. Gray	ASTERACEAE	PALMER SAGEWORT	native	
Artemisia pycnocephala (Less.) DC.	ASTERACEAE	COASTAL SAGEWORT	native	
Artemisia rothrockii A. Gray	ASTERACEAE	ROTHROCK SAGEBRUSH	native	
Artemisia spiciformis Osterh.	ASTERACEAE	SNOWFIELD SAGEBRUSH	native	
Artemisia spinescens D. C. Eaton	ASTERACEAE	BUDSAGE	native	
Artemisia suksdorfii Piper	ASTERACEAE	COASTAL MUGWORT	native	
Artemisia tridentata Nutt.	ASTERACEAE	SAGEBRUSH	native	
Artemisia tridentata Nutt. subsp. parishii (A. Gray) H. M. Hall & Clem.	ASTERACEAE	SAGEBRUSH	native	
Artemisia tridentata Nutt. subsp. tridentata	ASTERACEAE	BIG SAGEBRUSH	native	
Artemisia tridentata Nutt. subsp. vaseyana (Rydb.) Beetle	ASTERACEAE	MOUNTAIN SAGEBRUSH	native	
Artemisia tridentata Nutt. subsp. wyomingensis Beetle & A. L. Young	ASTERACEAE	WYOMING SAGEBRUSH	native	
Artemisia tripartita Rydb.	ASTERACEAE		native	acceptance uncertain
Arum italicum Mill.	ARACEAE		naturalized	
Aruncus dioicus (Walter) Fernald	ROSACEAE	GOAT'S BEARD	native	
Aruncus dioicus (Walter) Fernald var. acuminatus (Rydb.) H. Hara	ROSACEAE		native	
Arundo donax L.	POACEAE	GIANT REED	naturalized	
Asarum caudatum Lindl.	ARISTOLOCHIACEAE	WILD-GINGER	native	
Asarum hartwegii S. Watson	ARISTOLOCHIACEAE	WILD-GINGER	native	
Asarum lemmonii S. Watson	ARISTOLOCHIACEAE	WILD-GINGER	native	
Asarum marmoratum Piper	ARISTOLOCHIACEAE	MARBLED WILD-GINGER	native	
Asclepias albicans S. Watson	APOCYNACEAE	WAX MILKWEED; WHITE-STEMMED MILKWEED	native	
Asclepias asperula (Decne.) Woodson	APOCYNACEAE	MILKWEED	native	
Asclepias asperula (Decne.) Woodson subsp. asperula	APOCYNACEAE	ANTELOPE HORNS	native	
Asclepias californica Greene	APOCYNACEAE	CALIFORNIA MILKWEED; ROUND-HOODED MILKWEED	native	
Asclepias cordifolia (Benth.) Jeps.	APOCYNACEAE	PURPLE MILKWEED	native	
Asclepias cryptoceras S. Watson	APOCYNACEAE	HUMBOLDT MOUNTAINS MILKWEED	native	
Asclepias eriocarpa Benth.	APOCYNACEAE	INDIAN MILKWEED; KOTOLO MILKWEED	native	
Asclepias erosa Torr.	APOCYNACEAE	DESERT MILKWEED	native	
Asclepias fascicularis Decne.	APOCYNACEAE	NARROW-LEAF MILKWEED	native	
Asclepias linaria Cav.	APOCYNACEAE	MILKWEED	native	
Asclepias nyctaginifolia A. Gray	APOCYNACEAE	MOJAVE MILKWEED	native	
Asclepias solanoana Woodson	APOCYNACEAE	PROSTRATE MILKWEED; SOLANOA	native	
Asclepias speciosa Torr.	APOCYNACEAE	GREEK MILKWEED; SHOWY MILKWEED	native	
Asclepias subulata Decne.	APOCYNACEAE	AJAMETE; RUSH MILKWEED	native	
Asclepias vestita Hook. & Arn.	APOCYNACEAE	WOOLLY MILKWEED	native	
Asparagus asparagoides (L.) Druce	ASPARAGACEAE		naturalized	
Asparagus officinalis L.	ASPARAGACEAE		naturalized	
Asparagus officinalis L. subsp. officinalis	ASPARAGACEAE		naturalized	
Asparagus setaceus (Kunth) Jessop	ASPARAGACEAE		naturalized	acceptance uncertain
Asperugo procumbens L.	BORAGINACEAE	MADWORT	naturalized	
Asphodelus fistulosus L.	ASPHODELACEAE	ASPHODEL	naturalized	
Aspidotis californica (Hook.) Copel.	PTERIDACEAE		native	
Aspidotis carlotta-halliae (W. H. Wagner & E. F. Gilbert) Lellinger	PTERIDACEAE	CARLOTTA HALL'S LACE FERN	native	
Aspidotis densa (Brack.) Lellinger	PTERIDACEAE	INDIAN'S DREAM	native	
Asplenium septentrionale (L.) Hoffm.	ASPLENIACEAE	NORTHERN SPLEENWORT	native	
Asplenium trichomanes L.	ASPLENIACEAE	SPLEENWORT	native	
Asplenium trichomanes L. subsp. trichomanes	ASPLENIACEAE	MAIDENHAIR SPLEENWORT	native	
Asplenium vespertinum Maxon	ASPLENIACEAE	SPLEENWORT	native	
Asplenium viride Huds.	ASPLENIACEAE		native	
Astragalus accidens S. Watson	FABACEAE		native	
Astragalus accidens S. Watson var. hendersonii (S. Watson) M. E. Jones	FABACEAE		native	
Astragalus acutirostris S. Watson	FABACEAE		native	
Astragalus agnicidus Barneby	FABACEAE	HUMBOLDT MILKVETCH	native	
Astragalus agrestis Douglas ex G. Don	FABACEAE	PURPLE LOCO	native	
Astragalus albens Greene	FABACEAE	CUSHENBURY MILKVETCH; SILVERY-WHITE MILKVETCH	native	
Astragalus allochrous A. Gray	FABACEAE		native	
Astragalus allochrous A. Gray var. playanus (M. E. Jones) Isely	FABACEAE		native	
Astragalus andersonii A. Gray	FABACEAE		native	
Astragalus anxius Meinke & Kaye	FABACEAE		native	acceptance uncertain
Astragalus argophyllus Nutt.	FABACEAE		native	
Astragalus argophyllus Nutt. var. argophyllus	FABACEAE	SILVERLEAF MILKVETCH	native	
Astragalus aridus A. Gray	FABACEAE		native	
Astragalus asymmetricus E. Sheld.	FABACEAE		native	
Astragalus atratus S. Watson	FABACEAE		native	
Astragalus atratus S. Watson var. mensanus M. E. Jones	FABACEAE	DARWIN MESA MILKVETCH	native	
Astragalus austiniae Brewer & S. Watson	FABACEAE		native	
Astragalus bernardinus M. E. Jones	FABACEAE		native	
Astragalus bicristatus A. Gray	FABACEAE	CRESTED MILKVETCH	native	
Astragalus bolanderi A. Gray	FABACEAE		native	
Astragalus brauntonii Parish	FABACEAE	BRAUNTON'S MILKVETCH	native	
Astragalus breweri A. Gray	FABACEAE	BREWER'S MILKVETCH	native	
Astragalus californicus (A. Gray) Greene	FABACEAE		native	
Astragalus calycosus Torr. ex S. Watson	FABACEAE		native	
Astragalus calycosus Torr. ex S. Watson var. calycosus	FABACEAE	TORREY'S MILKVETCH	native	
Astragalus canadensis L.	FABACEAE		native	
Astragalus canadensis L. var. brevidens (Gand.) Barneby	FABACEAE		native	
Astragalus casei A. Gray	FABACEAE		native	
Astragalus cicer L.	FABACEAE		naturalized	acceptance uncertain
Astragalus cimae M. E. Jones	FABACEAE		native	
Astragalus cimae M. E. Jones var. cimae	FABACEAE	CIMA MILKVETCH	native	
Astragalus cimae M. E. Jones var. sufflatus Barneby	FABACEAE		native	
Astragalus claranus Jeps.	FABACEAE	CLARA HUNT'S MILKVETCH	native	
Astragalus clevelandii Greene	FABACEAE	CLEVELAND'S MILKVETCH	native	
Astragalus coccineus Brandegee	FABACEAE	SCARLET MILKVETCH	native	
Astragalus congdonii S. Watson	FABACEAE		native	
Astragalus crotalariae (Benth.) Torr.	FABACEAE	SALTON MILKVETCH	native	
Astragalus curtipes A. Gray	FABACEAE		native	
Astragalus curvicarpus (A. Heller) Macbr.	FABACEAE		native	
Astragalus curvicarpus (A. Heller) Macbr. var. curvicarpus	FABACEAE		native	
Astragalus deanei (Rydb.) Barneby	FABACEAE	DEAN'S MILKVETCH	native	
Astragalus didymocarpus Hook. & Arn.	FABACEAE	TWO-SEEDED MILKVETCH	native	
Astragalus didymocarpus Hook. & Arn. var. didymocarpus	FABACEAE		native	
Astragalus didymocarpus Hook. & Arn. var. dispermus (A. Gray) Jeps.	FABACEAE		native	
Astragalus didymocarpus Hook. & Arn. var. milesianus (Rydb.) Jeps.	FABACEAE		native	
Astragalus didymocarpus Hook. & Arn. var. obispoensis (Rydb.) Jeps.	FABACEAE		native	
Astragalus douglasii (Torr. & A. Gray) A. Gray	FABACEAE		native	
Astragalus douglasii (Torr. & A. Gray) A. Gray var. douglasii	FABACEAE		native	
Astragalus douglasii (Torr. & A. Gray) A. Gray var. parishii (A. Gray) M. E. Jones	FABACEAE		native	
Astragalus douglasii (Torr. & A. Gray) A. Gray var. perstrictus (Rydb.) Munz & McBurney	FABACEAE	JACUMBA MILKVETCH	native	
Astragalus ertterae Barneby & Shevock	FABACEAE	ERTTER'S MILKVETCH; WALKER PASS MILKVETCH	native	
Astragalus filipes Torr. ex A. Gray	FABACEAE		native	
Astragalus funereus M. E. Jones	FABACEAE	BLACK MILKVETCH	native	
Astragalus gambelianus E. Sheld.	FABACEAE		native	
Astragalus geyeri A. Gray	FABACEAE		native	
Astragalus geyeri A. Gray var. geyeri	FABACEAE	GEYER'S MILKVETCH	native	
Astragalus gibbsii Kellogg	FABACEAE		native	
Astragalus gilmanii Tidestr.	FABACEAE	GILMAN'S MILKVETCH	native	
Astragalus hornii A. Gray	FABACEAE		native	
Astragalus hornii A. Gray var. hornii	FABACEAE		native	
Astragalus insularis Kellogg	FABACEAE		native	
Astragalus insularis Kellogg var. harwoodii Munz & McBurney	FABACEAE	S MILKVETCH; S RATTLEWEED	native	
Astragalus inversus M. E. Jones	FABACEAE	SUSANVILLE MILKVETCH	native	
Astragalus inyoensis E. Sheld. ex Coville	FABACEAE	INYO MILKVETCH	native	
Astragalus iodanthus S. Watson	FABACEAE		native	
Astragalus iodanthus S. Watson var. diaphanoides Barneby	FABACEAE		native	
Astragalus iodanthus S. Watson var. iodanthus	FABACEAE	HUMBOLDT RIVER MILKVETCH	native	
Astragalus jaegerianus Munz	FABACEAE	LANE MOUNTAIN MILKVETCH	native	
Astragalus johannis-howellii Barneby	FABACEAE	LONG VALLEY MILKVETCH	native	
Astragalus kentrophyta A. Gray	FABACEAE		native	
Astragalus kentrophyta A. Gray var. danaus (Barneby) Barneby	FABACEAE	SWEETWATER MOUNTAINS MILKVETCH	native	
Astragalus kentrophyta A. Gray var. elatus S. Watson	FABACEAE	SPINY-LEAVED MILKVETCH	native	
Astragalus kentrophyta A. Gray var. tegetarius (S. Watson) Dorn	FABACEAE		native	
Astragalus kentrophyta A. Gray var. ungulatus M. E. Jones	FABACEAE		native	acceptance uncertain
Astragalus layneae Greene	FABACEAE		native	
Astragalus lemmonii A. Gray	FABACEAE		native	
Astragalus lentiformis A. Gray	FABACEAE	LENS-POD MILKVETCH	native	
Astragalus lentiginosus Douglas	FABACEAE	FRECKLED MILKVETCH	native	
Astragalus lentiginosus Douglas var. albifolius M. E. Jones	FABACEAE		native	
Astragalus lentiginosus Douglas var. antonius Barneby	FABACEAE	SAN ANTONIO MILKVETCH	native	
Astragalus lentiginosus Douglas var. borreganus M. E. Jones	FABACEAE	BORREGO MILKVETCH	native	
Astragalus lentiginosus Douglas var. chartaceus M. E. Jones	FABACEAE		native	
Astragalus lentiginosus Douglas var. coachellae Shreve & Wiggins	FABACEAE	COACHELLA VALLEY MILKVETCH	native	
Astragalus lentiginosus Douglas var. floribundus A. Gray	FABACEAE		native	
Astragalus lentiginosus Douglas var. fremontii (A. Gray) S. Watson	FABACEAE		native	
Astragalus lentiginosus Douglas var. idriensis M. E. Jones	FABACEAE		native	
Astragalus lentiginosus Douglas var. ineptus (A. Gray) M. E. Jones	FABACEAE		native	
Astragalus lentiginosus Douglas var. kernensis (Jeps.) Barneby	FABACEAE	KERN PLATEAU MILKVETCH	native	
Astragalus lentiginosus Douglas var. lentiginosus	FABACEAE		native	
Astragalus lentiginosus Douglas var. micans Barneby	FABACEAE	SHINING MILKVETCH	native	
Astragalus lentiginosus Douglas var. nigricalycis M. E. Jones	FABACEAE		native	
Astragalus lentiginosus Douglas var. piscinensis Barneby	FABACEAE	FISH SLOUGH MILKVETCH	native	
Astragalus lentiginosus Douglas var. salinus (Howell) Barneby	FABACEAE		native	
Astragalus lentiginosus Douglas var. semotus Jeps.	FABACEAE		native	
Astragalus lentiginosus Douglas var. sesquimetralis (Rydb.) Barneby	FABACEAE	SODAVILLE MILKVETCH	native	
Astragalus lentiginosus Douglas var. sierrae M. E. Jones	FABACEAE	BEAR VALLEY MILKVETCH	native	
Astragalus lentiginosus Douglas var. variabilis Barneby	FABACEAE		native	
Astragalus leucolobus S. Watson ex M. E. Jones	FABACEAE	BEAR VALLEY WOOLLYPOD	native	
Astragalus macrodon (Hook. & Arn.) A. Gray	FABACEAE	SALINAS MILKVETCH	native	
Astragalus magdalenae Greene	FABACEAE		native	
Astragalus magdalenae Greene var. peirsonii (Munz & J. McBurney) Barneby	FABACEAE	PEIRSON'S MILKVETCH	native	
Astragalus malacus A. Gray	FABACEAE		native	
Astragalus miguelensis Greene	FABACEAE	SAN MIGUEL MILKVETCH	native	
Astragalus minthorniae (Rydb.) Jeps.	FABACEAE		native	
Astragalus minthorniae (Rydb.) Jeps. var. villosus Barneby	FABACEAE		native	
Astragalus mohavensis S. Watson	FABACEAE		native	
Astragalus mohavensis S. Watson var. mohavensis	FABACEAE		native	
Astragalus monoensis Barneby	FABACEAE	MONO MILKVETCH	native	
Astragalus nevinii A. Gray	FABACEAE	SAN CLEMENTE ISLAND MILKVETCH	native	
Astragalus newberryi A. Gray	FABACEAE		native	
Astragalus newberryi A. Gray var. newberryi	FABACEAE		native	
Astragalus nutans M. E. Jones	FABACEAE	PROVIDENCE MOUNTAIN MILKVETCH	native	
Astragalus nuttallianus DC.	FABACEAE		native	
Astragalus nuttallianus DC. var. austrinus (Small) Barneby	FABACEAE		native	
Astragalus nuttallianus DC. var. cedrosensis M. E. Jones	FABACEAE		native	
Astragalus nuttallianus DC. var. imperfectus (Rydb.) Barneby	FABACEAE		native	
Astragalus nuttallii (Torr. & A. Gray) J. T. Howell	FABACEAE		native	
Astragalus nuttallii (Torr. & A. Gray) J. T. Howell var. nuttallii	FABACEAE		native	
Astragalus nuttallii (Torr. & A. Gray) J. T. Howell var. virgatus (A. Gray) Barneby	FABACEAE		native	
Astragalus obscurus S. Watson	FABACEAE		native	
Astragalus oocarpus A. Gray	FABACEAE	SAN DIEGO MILKVETCH	native	
Astragalus oophorus S. Watson	FABACEAE		native	
Astragalus oophorus S. Watson var. lavinii Barneby	FABACEAE	LAVIN'S MILKVETCH	native	
Astragalus oophorus S. Watson var. oophorus	FABACEAE		native	
Astragalus oxyphysus A. Gray	FABACEAE		native	
Astragalus pachypus Greene	FABACEAE		native	
Astragalus pachypus Greene var. jaegeri Munz & McBurney	FABACEAE	JAEGER'S MILKVETCH	native	
Astragalus pachypus Greene var. pachypus	FABACEAE		native	
Astragalus palmeri A. Gray	FABACEAE		native	
Astragalus panamintensis E. Sheld.	FABACEAE		native	
Astragalus pauperculus Greene	FABACEAE	DEPAUPERATE MILKVETCH	native	
Astragalus platytropis A. Gray	FABACEAE	BROAD-KEELED MILKVETCH	native	
Astragalus pomonensis M. E. Jones	FABACEAE		native	
Astragalus preussii A. Gray	FABACEAE		native	
Astragalus preussii A. Gray var. laxiflorus A. Gray	FABACEAE	LANCASTER MILKVETCH	native	
Astragalus preussii A. Gray var. preussii	FABACEAE	DESERT MILKVETCH	native	
Astragalus pseudiodanthus Barneby	FABACEAE	TONOPAH MILKVETCH	native	
Astragalus pulsiferae A. Gray	FABACEAE		native	
Astragalus pulsiferae A. Gray var. coronensis S. L. Welsh, Ondricek, & G. Clifton	FABACEAE		native	acceptance uncertain
Astragalus pulsiferae A. Gray var. pulsiferae	FABACEAE	AMES MILKVETCH	native	
Astragalus pulsiferae A. Gray var. suksdorfii (Howell) Barneby	FABACEAE	SUKSDORF'S MILKVETCH	native	
Astragalus purshii Douglas	FABACEAE	PURSH'S MILKVETCH	native	
Astragalus purshii Douglas var. lagopinus (Rydb.) Barneby	FABACEAE		native	
Astragalus purshii Douglas var. lectulus (S. Watson) M. E. Jones	FABACEAE		native	
Astragalus purshii Douglas var. purshii	FABACEAE		native	
Astragalus purshii Douglas var. tinctus M. E. Jones	FABACEAE		native	
Astragalus pycnostachyus A. Gray	FABACEAE		native	
Astragalus pycnostachyus A. Gray var. lanosissimus (Rydb.) Munz & McBurney	FABACEAE	VENTURA MARSH MILKVETCH	native	
Astragalus pycnostachyus A. Gray var. pycnostachyus	FABACEAE		native	
Astragalus rattanii A. Gray	FABACEAE		native	
Astragalus rattanii A. Gray var. jepsonianus Barneby	FABACEAE	JEPSON'S MILKVETCH	native	
Astragalus rattanii A. Gray var. rattanii	FABACEAE	RATTAN'S MILKVETCH	native	
Astragalus ravenii Barneby	FABACEAE	RAVEN'S MILKVETCH	native	
Astragalus sabulonum A. Gray	FABACEAE		native	
Astragalus sepultipes (Barneby) Barneby	FABACEAE	BISHOP MILKVETCH	native	
Astragalus serenoi (Kuntze) E. Sheld.	FABACEAE		native	
Astragalus serenoi (Kuntze) E. Sheld. var. shockleyi (M. E. Jones) Barneby	FABACEAE	NAKED MILKVETCH	native	
Astragalus shevockii Barneby	FABACEAE	SHEVOCK'S MILKVETCH	native	
Astragalus subvestitus (Jeps.) Barneby	FABACEAE	KERN COUNTY MILKVETCH	native	
Astragalus tener A. Gray	FABACEAE		native	
Astragalus tener A. Gray var. ferrisiae Liston	FABACEAE	FERRIS' MILKVETCH	native	
Astragalus tener A. Gray var. tener	FABACEAE	ALKALI MILKVETCH	native	
Astragalus tener A. Gray var. titi (Eastw.) Barneby	FABACEAE	COASTAL DUNES MILKVETCH	native	
Astragalus tephrodes A. Gray	FABACEAE		native	
Astragalus tephrodes A. Gray var. brachylobus (A. Gray) Barneby	FABACEAE		native	
Astragalus tidestromii (Rydb.) Clokey	FABACEAE		native	
Astragalus traskiae Eastw.	FABACEAE	TRASK'S MILKVETCH	native	
Astragalus tricarinatus A. Gray	FABACEAE	TRIPLE-RIBBED MILKVETCH	native	
Astragalus trichopodus (Nutt.) A. Gray	FABACEAE		native	
Astragalus trichopodus (Nutt.) A. Gray var. lonchus (M. E. Jones) Barneby	FABACEAE		native	
Astragalus trichopodus (Nutt.) A. Gray var. phoxus (M. E. Jones) Barneby	FABACEAE		native	
Astragalus trichopodus (Nutt.) A. Gray var. trichopodus	FABACEAE		native	
Astragalus umbraticus E. Sheld.	FABACEAE	BALD MOUNTAIN MILKVETCH	native	
Astragalus webberi A. Gray	FABACEAE	WEBBER'S MILKVETCH	native	
Astragalus whitneyi A. Gray	FABACEAE		native	
Astragalus whitneyi A. Gray var. confusus Barneby	FABACEAE		native	
Astragalus whitneyi A. Gray var. lenophyllus (Rydb.) Barneby	FABACEAE		native	
Astragalus whitneyi A. Gray var. siskiyouensis (Rydb.) Barneby	FABACEAE		native	
Astragalus whitneyi A. Gray var. whitneyi	FABACEAE		native	
Astrolepis cochisensis (Goodd.) D.M. Benham & Windham	PTERIDACEAE	SCALY CLOAK FERN	native	
Astrolepis cochisensis (Goodd.) D.M. Benham & Windham subsp. cochisensis	PTERIDACEAE		native	
Asyneuma prenanthoides (Durand) McVaugh	CAMPANULACEAE		native	
Athyrium distentifolium Opiz	WOODSIACEAE		native	
Athyrium distentifolium Opiz var. americanum (Butters) Cronquist	WOODSIACEAE		native	
Athyrium filix-femina (L.) Roth	WOODSIACEAE	LADY FERN	native	
Athyrium filix-femina (L.) Roth var. cyclosorum Rupr.	WOODSIACEAE	LADY FERN	native	
Athysanus pusillus (Hook.) Greene	BRASSICACEAE		native	
Atrichoseris platyphylla (A. Gray) A. Gray	ASTERACEAE	GRAVEL-GHOST; TOBACCO-WEED	native	
Atriplex amnicola Paul G.Wilson	CHENOPODIACEAE		naturalized	acceptance uncertain
Atriplex argentea Nutt.	CHENOPODIACEAE	SILVERSCALE	native	
Atriplex argentea Nutt. var. argentea	CHENOPODIACEAE	SALTBUSH	native	
Atriplex argentea Nutt. var. hillmanii M. E. Jones	CHENOPODIACEAE	SALTBUSH	native	
Atriplex argentea Nutt. var. mohavensis (M. E. Jones) S. L. Welsh	CHENOPODIACEAE	SALTBUSH	native	
Atriplex californica Moq.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex canescens (Pursh) Nutt.	CHENOPODIACEAE	FOURWING SALTBUSH; SHAD-SCALE	native	
Atriplex canescens (Pursh) Nutt. subsp. canescens	CHENOPODIACEAE	SALTBUSH	native	
Atriplex canescens (Pursh) Nutt. subsp. linearis (S. Watson) H. M. Hall & Clem.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex confertifolia (Torr. & Frém.) S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex cordulata Jeps.	CHENOPODIACEAE	HEARTSCALE	native	
Atriplex coronata S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex coronata S. Watson var. coronata	CHENOPODIACEAE	CROWNSCALE	native	
Atriplex coronata S. Watson var. notatior Jeps.	CHENOPODIACEAE	SAN JACINTO VALLEY CROWNSCALE	native	
Atriplex coulteri (Moq.) D. Dietr.	CHENOPODIACEAE	COULTER'S SALTBUSH	native	
Atriplex depressa Jeps.	CHENOPODIACEAE	BRITTLESCALE	native	
Atriplex dioica Raf.	CHENOPODIACEAE		native	acceptance uncertain
Atriplex elegans (Moq.) D. Dietr.	CHENOPODIACEAE	WHEELSCALE	native	
Atriplex elegans (Moq.) D. Dietr. var. elegans	CHENOPODIACEAE	SALTBUSH	native	
Atriplex elegans (Moq.) D. Dietr. var. fasciculata (S. Watson) M. E. Jones	CHENOPODIACEAE	SALTBUSH	native	
Atriplex erecticaulis Stutz, G. L. Chu & S. C. Sand.	CHENOPODIACEAE		native	acceptance uncertain
Atriplex fruticulosa Jeps.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex gardneri (Moq.) D. Dietr.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex gardneri (Moq.) D. Dietr. var. falcata (M. E. Jones) S. L. Welsh	CHENOPODIACEAE	SALTBUSH	native	
Atriplex heterosperma Bunge	CHENOPODIACEAE	SALTBUSH	naturalized	
Atriplex hortensis L.	CHENOPODIACEAE	GARDEN ORACLE	naturalized	
Atriplex hymenelytra (Torr.) S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex joaquinana A. Nelson	CHENOPODIACEAE		native	
Atriplex lentiformis (Torr.) S. Watson	CHENOPODIACEAE	BIG SALTBUSH	native	
Atriplex lentiformis (Torr.) S. Watson subsp. lentiformis	CHENOPODIACEAE	SALTBUSH	native	
Atriplex lentiformis (Torr.) S. Watson subsp. torreyi (S. Watson) H. M. Hall & Clem.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex leucophylla (Moq.) D. Dietr.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex lindleyi Moq.	CHENOPODIACEAE	SALTBUSH	naturalized	
Atriplex minuscula Standl.	CHENOPODIACEAE	LESSER SALTBUSH	native	
Atriplex nummularia Lindl.	CHENOPODIACEAE	SALTBUSH	naturalized	
Atriplex pacifica A. Nelson	CHENOPODIACEAE	SOUTH COAST SALTBUSH	native	
Atriplex parishii S. Watson	CHENOPODIACEAE	PARISH'S BRITTLESCALE	native	
Atriplex parryi S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex patula L.	CHENOPODIACEAE	SPEAR ORACLE	native	
Atriplex patula L. var. obtusa (Cham.) M. Peck	CHENOPODIACEAE	SALTBUSH	native	
Atriplex patula L. var. patula	CHENOPODIACEAE	SALTBUSH	native	
Atriplex persistens Stutz & G. L. Chu	CHENOPODIACEAE		native	acceptance uncertain
Atriplex phyllostegia (Torr. ex S. Watson) S. Watson	CHENOPODIACEAE	ARROWSCALE	native	
Atriplex polycarpa (Torr.) S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex pusilla (Torr. ex S. Watson) S. Watson	CHENOPODIACEAE	SALTBUSH	native	
Atriplex rosea L.	CHENOPODIACEAE	TUMBLING ORACLE	naturalized	
Atriplex semibaccata R. Br.	CHENOPODIACEAE	AUSTRALIAN SALTBUSH	naturalized	
Atriplex serenana A. Nelson	CHENOPODIACEAE	BRACTSCALE	native	
Atriplex serenana A. Nelson var. davidsonii (Standl.) Munz	CHENOPODIACEAE	DAVIDSON'S SALTBUSH	native	
Atriplex serenana A. Nelson var. serenana	CHENOPODIACEAE	SALTBUSH	native	
Atriplex spinifera J. F. Macbr.	CHENOPODIACEAE	SALTBUSH	native	
Atriplex suberecta I. Verd.	CHENOPODIACEAE	SALTBUSH	naturalized	
Atriplex triangularis Willd.	CHENOPODIACEAE	SPEARSCALE	native	
Atriplex truncata (Torr. ex S. Watson) A. Gray	CHENOPODIACEAE	WEDGESCALE	native	
Atriplex tularensis Coville	CHENOPODIACEAE	BAKERSFIELD SMALLSCALE	native	
Atriplex vallicola Hoover	CHENOPODIACEAE	LOST HILLS CROWNSCALE	native	
Atriplex vesicaria Heward ex Benth.	CHENOPODIACEAE		naturalized	acceptance uncertain
Atriplex watsonii A. Nelson	CHENOPODIACEAE	SALTBUSH	native	
Aubrieta deltoidea (L.) DC.	BRASSICACEAE		naturalized	
Avena barbata Link	POACEAE	SLENDER WILD OAT	naturalized	
Avena fatua L.	POACEAE	WILD OAT	naturalized	
Avena sativa L.	POACEAE	CULTIVATED OAT	naturalized	
Avena sterilis L.	POACEAE	OATS	naturalized	
Avena strigosa Schreb.	POACEAE	OATS	naturalized	
Avicennia marina (Forssk.) Vierh.	ACANTHACEAE	RED MANGROVE	naturalized	
Avicennia marina (Forssk.) Vierh. var. resinifera (G. Forst.) Bakh.	Acanthaceae	RED MANGROVE	naturalized	
Axonopus affinis Chase	POACEAE		naturalized	
Ayenia compacta Rose	STERCULIACEAE	AYENIA	native	
Azolla filiculoides Lam.	AZOLLACEAE		native	
Azolla microphylla Kaulf.	AZOLLACEAE		native	
Baccharis brachyphylla A. Gray	ASTERACEAE		native	
Baccharis douglasii DC.	ASTERACEAE	MARSH BACCHARIS	native	
Baccharis emoryi A. Gray	ASTERACEAE		native	
Baccharis malibuensis R. M. Beauch. & Henr.	ASTERACEAE		native	acceptance uncertain
Baccharis pilularis DC.	ASTERACEAE	CHAPARRAL BROOM; COYOTE BRUSH	native	
Baccharis plummerae A. Gray	ASTERACEAE		native	
Baccharis plummerae A. Gray subsp. glabrata Hoover	ASTERACEAE	SAN SIMEON BACCHARIS	native	
Baccharis plummerae A. Gray subsp. plummerae	ASTERACEAE	PLUMMER'S BACCHARIS	native	
Baccharis salicifolia (Ruiz & Pav.) Pers.	ASTERACEAE	MULE FAT; SEEP-WILLOW; WATER-WALLY	native	
Baccharis sarothroides A. Gray	ASTERACEAE	BROOM BACCHARIS	native	
Baccharis sergiloides A. Gray	ASTERACEAE	DESERT BACCHARIS; SQUAW WATERWEED	native	
Baccharis vanessae R. M. Beauch.	ASTERACEAE	ENCINITAS BACCHARIS	native	
Bacopa eisenii (Kellogg) Pennell	PLANTAGINACEAE	WATER-HYSSOP	native	
Bacopa monnieri (L.) Wettst.	PLANTAGINACEAE	WATER-HYSSOP	naturalized	
Bacopa repens (Sw.) Wettst.	PLANTAGINACEAE	WATER-HYSSOP	naturalized	
Bacopa rotundifolia (Michx.) Wettst.	PLANTAGINACEAE	WATER-HYSSOP	naturalized	
Bahiopsis laciniata (A. Gray) E. E. Schilling & Panero	ASTERACEAE		native	
Bahiopsis parishii (Greene) E. E. Schilling & Panero	ASTERACEAE		native	
Bahiopsis reticulata (S. Watson) E. E. Schilling & Panero	ASTERACEAE		native	
Baileya multiradiata Harv. & A. Gray ex Torr.	ASTERACEAE	DESERT-MARIGOLD	native	
Baileya pauciradiata A. Gray	ASTERACEAE	DESERT-MARIGOLD	native	
Baileya pleniradiata A. Gray	ASTERACEAE	DESERT-MARIGOLD	native	
Balsamorhiza deltoidea Nutt.	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza hirsuta Nutt.	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza hookeri Nutt.	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza hookeri Nutt. var. lanata W. M. Sharp	ASTERACEAE	BALSAM-ROOT	native	acceptance uncertain
Balsamorhiza macrolepis W. M. Sharp	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza macrolepis W. M. Sharp var. macrolepis	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza macrolepis W. M. Sharp var. platylepis (W. M. Sharp) Ferris	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza sagittata (Pursh) Nutt.	ASTERACEAE	BALSAM-ROOT	native	
Balsamorhiza sericea W. A. Weber	ASTERACEAE	SILKY BALSAM-ROOT	native	
Balsamorhiza serrata A. Nelson & J. F. Macbr.	ASTERACEAE	BALSAM-ROOT	native	
Barbarea orthoceras Ledeb.	BRASSICACEAE		native	
Barbarea verna (Mill.) Asch.	BRASSICACEAE	EARLY WINTER CRESS; SCURVY GRASS	naturalized	
Barbarea vulgaris W. T. Aiton	BRASSICACEAE	COMMON WINTER CRESS; YELLOW ROCKET	naturalized	
Bassia hyssopifolia (Pall.) Kuntze	CHENOPODIACEAE		naturalized	
Batis maritima L.	BATACEAE	BEACHWORT; SALTWORT	native	
Bebbia juncea (Benth.) Greene	ASTERACEAE	SWEETBUSH	native	
Bebbia juncea (Benth.) Greene var. aspera Greene	ASTERACEAE	SWEETBUSH	native	
Beckmannia syzigachne (Steud.) Fernald	POACEAE		native	
Bellardia trixago (L.) All.	SCROPHULARIACEAE		naturalized	
Bellis perennis L.	ASTERACEAE	ENGLISH DAISY	naturalized	
Benitoa occidentalis (H. M. Hall) D. D. Keck	ASTERACEAE		native	
Bensoniella oregona (Abrams & Bacig.) C. V. Morton	SAXIFRAGACEAE	BENSONIELLA	native	
Berberis aquifolium Pursh	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis aquifolium Pursh var. aquifolium	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis aquifolium Pursh var. dictyota (Jeps.) Jeps.	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis aquifolium Pursh var. repens (Lindl.) Scoggan	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis darwinii Hook.	BERBERIDACEAE		naturalized	
Berberis fremontii Torr.	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis haematocarpa Wooton	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis harrisoniana Kearney & Peebles	BERBERIDACEAE		native	
Berberis higginsiae Munz	BERBERIDACEAE		native	
Berberis nervosa Pursh	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis nevinii A. Gray	BERBERIDACEAE	NEVIN'S BARBERRY	native	
Berberis pinnata Lag.	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis pinnata Lag. subsp. insularis Munz	BERBERIDACEAE	ISLAND BARBERRY	native	
Berberis pinnata Lag. subsp. pinnata	BERBERIDACEAE	BARBERRY; OREGON-GRAPE	native	
Berberis vulgaris L.	BERBERIDACEAE		naturalized	
Bergerocactus emoryi (Engelm.) Britton & Rose	CACTACEAE	GOLDEN-SPINED CEREUS	native	
Bergia texana (Hook.) Seub. ex Walp.	ELATINACEAE		native	
Bernardia myricifolia (Scheele) S. Watson	EUPHORBIACEAE		native	
Berteroa incana (L.) DC.	BRASSICACEAE		naturalized	acceptance uncertain
Berula erecta (Huds.) Coville	APIACEAE	CUTLEAF WATER-PARSNIP	native	
Beta macrocarpa Guss.	CHENOPODIACEAE		naturalized	
Beta vulgaris L.	CHENOPODIACEAE	BEET	naturalized	
Betula glandulosa Michx.	BETULACEAE	RESIN BIRCH	native	
Bidens cernua L.	ASTERACEAE	BEGGAR'S TICK; SPANISH-NEEDLES; STICKTIGHT	native	
Bidens cernua L. var. cernua	ASTERACEAE	NODDING BUR-MARIGOLD	native	
Bidens frondosa L.	ASTERACEAE	STICKTIGHT	native	
Bidens laevis (L.) Britton, Sterns & Poggenb.	ASTERACEAE	BUR-MARIGOLD	native	
Bidens pilosa L.	ASTERACEAE	BEGGAR'S TICK; SPANISH-NEEDLES; STICKTIGHT	naturalized	
Bidens pilosa L. var. pilosa	ASTERACEAE	COMMON BEGGAR-TICKS; SPANISH-NEEDLES	naturalized	
Bidens tripartita L.	ASTERACEAE	BEGGAR'S TICK; SPANISH-NEEDLES; STICKTIGHT	naturalized	
Bidens vulgata Greene	ASTERACEAE	BEGGAR'S TICK; SPANISH-NEEDLES; STICKTIGHT	naturalized	
Billardiera heterophylla (Lindl.) L.W.Cayzer & Crisp	PITTOSPORACEAE		naturalized	
Bistorta bistortoides (Pursh) Small	POLYGONACEAE		native	
Bituminaria bituminosa (L.) C. H. Stirt.	FABACEAE		naturalized	
Blechnum spicant (L.) Roth	BLECHNACEAE	DEER FERN	native	
Blennosperma bakeri Heiser	ASTERACEAE	BAKER'S BLENNOSPERMA	native	
Blennosperma nanum (Hook.) S. F. Blake	ASTERACEAE		native	
Blennosperma nanum (Hook.) S. F. Blake var. nanum	ASTERACEAE		native	
Blennosperma nanum (Hook.) S. F. Blake var. robustum J. T. Howell	ASTERACEAE	POINT REYES BLENNOSPERMA	native	
Blepharidachne kingii (S. Watson) Hack.	POACEAE	KING'S EYELASH GRASS	native	
Blepharipappus scaber Hook.	ASTERACEAE		native	
Blepharizonia laxa Greene	ASTERACEAE		native	
Blepharizonia plumosa (Kellogg) Greene	ASTERACEAE	BIG TARWEED	native	
Bloomeria crocea (Torr.) Coville	THEMIDACEAE	COMMON GOLDENSTAR	native	
Bloomeria humilis Hoover	THEMIDACEAE	DWARF GOLDENSTAR	native	
Boechera hirshbergiae (S. Boyd) Al-Shehbaz	BRASSICACEAE		native	
Boechera yorkii S. Boyd	BRASSICACEAE		native	acceptance uncertain
Boehmeria cylindrica (L.) Sw.	URTICACEAE		naturalized	
Boerhavia coccinea Mill.	NYCTAGINACEAE	SCARLET SPIDERLING	native	
Boerhavia coulteri (Hook. f.) S. Watson	NYCTAGINACEAE	SPIDERLING	native	
Boerhavia coulteri (Hook.f.) S. Watson var. palmeri (S.Watson) Spellenb.	NYCTAGINACEAE		native	
Boerhavia diffusa L.	NYCTAGINACEAE		naturalized	
Boerhavia triquetra S. Watson	NYCTAGINACEAE	SPIDERLING	native	
Boerhavia triquetra S. Watson var. intermedia (M. E. Jones) Spellenb.	NYCTAGINACEAE		native	
Boerhavia wrightii A. Gray	NYCTAGINACEAE	SPIDERLING	native	
Bolandra californica A. Gray	SAXIFRAGACEAE	SIERRA BOLANDRA	native	
Bolboschoenus glaucus (Lam.) S. G. Sm.	CYPERACEAE		native	
Bolboschoenus maritimus (L.) Palla	CYPERACEAE		native	
Bolboschoenus maritimus (L.) Palla subsp. paludosus (A. Nelson) T. Koyama	CYPERACEAE		native	
Bolboschoenus robustus (Pursh) Soják	CYPERACEAE		native	
Borago officinalis L.	BORAGINACEAE		naturalized	
Boschniakia hookeri Walp.	OROBANCHACEAE	SMALL GROUND-CONE	native	
Boschniakia strobilacea A. Gray	OROBANCHACEAE	CALIFORNIA GROUND-CONE	native	
Bothriochloa barbinodis (Lag.) Herter	POACEAE	CANE BLUESTEM	native	
Bothriochloa exaristata (Nash) Henrard	POACEAE		native	acceptance uncertain
Bothriochloa ischaemum (L.) Keng	POACEAE		naturalized	
Bothriochloa laguroides (DC.) Herter	POACEAE		naturalized	
Bothriochloa laguroides (DC.) Herter subsp. torreyana (Steud.) Allred & Gould	POACEAE		naturalized	
Botrychium ascendens W. H. Wagner	OPHIOGLOSSACEAE	UPSWEPT MOONWORT	native	
Botrychium crenulatum W. H. Wagner	OPHIOGLOSSACEAE	SCALLOPED MOONWORT	native	
Botrychium lineare W. H. Wagner	OPHIOGLOSSACEAE		native	
Botrychium lunaria (L.) Sw.	OPHIOGLOSSACEAE	MOONWORT	native	
Botrychium minganense Vict.	OPHIOGLOSSACEAE	MINGAN MOONWORT	native	
Botrychium montanum W. H. Wagner	OPHIOGLOSSACEAE	WESTERN GOBLIN	native	
Botrychium multifidum (S. G. Gmel.) Rupr.	OPHIOGLOSSACEAE	LEATHER GRAPE-FERN	native	
Botrychium pinnatum H. St. John	OPHIOGLOSSACEAE	NORTHWESTERN MOONWORT	native	
Botrychium simplex E. Hitchc.	OPHIOGLOSSACEAE	YOSEMITE MOONWORT	native	
Botrychium simplex E. Hitchc. var. compositum (Lasch) Milde	OPHIOGLOSSACEAE		native	
Botrychium virginianum (L.) Sw.	OPHIOGLOSSACEAE		native	
Bouteloua aristidoides (Kunth) Griseb.	POACEAE	GRAMA	native	
Bouteloua aristidoides (Kunth) Griseb. var. aristidoides	POACEAE	NEEDLE GRAMA	native	
Bouteloua barbata Lag.	POACEAE	GRAMA	native	
Bouteloua barbata Lag. var. barbata	POACEAE	SIX WEEKS GRAMA	native	
Bouteloua curtipendula (Michx.) Torr.	POACEAE	SIDE-OATS GRAMA	native	
Bouteloua eriopoda (Torr.) Torr.	POACEAE	BLACK GRAMA	native	
Bouteloua gracilis (Kunth) Griffiths	POACEAE	BLUE GRAMA	native	
Bouteloua trifida S. Watson	POACEAE	RED GRAMA	native	
Bowlesia incana Ruiz & Pav.	APIACEAE		native	
Boykinia major A. Gray	SAXIFRAGACEAE		native	
Boykinia occidentalis Torr. & A. Gray	SAXIFRAGACEAE		native	
Boykinia rotundifolia Parry ex A. Gray	SAXIFRAGACEAE	ROUND-LEAVED BOYKINIA	native	
Brachypodium distachyon (L.) P. Beauv.	POACEAE		naturalized	
Brachypodium pinnatum (L.) P. Beauv.	POACEAE		naturalized	
Brachypodium sylvaticum (Huds.) P. Beauv.	POACEAE		naturalized	acceptance uncertain
Brandegea bigelovii (S. Watson) Cogn.	CUCURBITACEAE		native	
Brasenia schreberi J. F. Gmel.	CABOMBACEAE	WATERSHIELD	native	
Brassica fruticulosa Cirillo	BRASSICACEAE		naturalized	
Brassica juncea (L.) Czern.	BRASSICACEAE	INDIAN MUSTARD	naturalized	
Brassica napus L.	BRASSICACEAE	RAPESEED; SWEDE RAPE	naturalized	
Brassica nigra (L.) W. D. J. Koch	BRASSICACEAE	BLACK MUSTARD	naturalized	
Brassica oleracea L.	BRASSICACEAE		naturalized	
Brassica rapa L.	BRASSICACEAE	FIELD MUSTARD; TURNIP	naturalized	
Brassica tournefortii Gouan	BRASSICACEAE	MUSTARD; TURNIP	naturalized	
Brickellia atractyloides A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia atractyloides A. Gray var. arguta (B. L. Robinson) Jeps.	ASTERACEAE		native	
Brickellia atractyloides A. Gray var. atractyloides	ASTERACEAE		native	
Brickellia atractyloides A. Gray var. odontolepis (B. L. Robinson) Jeps.	ASTERACEAE		native	
Brickellia californica (Torr. & A. Gray) A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia desertorum Coville	ASTERACEAE	BRICKELLBUSH	native	
Brickellia frutescens A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia grandiflora (Hook.) Nutt.	ASTERACEAE	BRICKELLBUSH	native	
Brickellia greenei A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia incana A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia knappiana Drew	ASTERACEAE	KNAPP'S BRICKELLIA	native	
Brickellia longifolia S. Watson	ASTERACEAE	BRICKELLBUSH	native	
Brickellia longifolia S. Watson var. multiflora (Kellogg) Cronquist	ASTERACEAE		native	
Brickellia microphylla (Nutt.) A. Gray	ASTERACEAE	BRICKELLBUSH	native	
Brickellia microphylla (Nutt.) A. Gray var. microphylla	ASTERACEAE		native	
Brickellia nevinii A. Gray	ASTERACEAE	NEVIN'S BRICKELLBUSH	native	
Brickellia oblongifolia Nutt.	ASTERACEAE	BRICKELLBUSH	native	
Brickellia oblongifolia Nutt. var. linifolia (D. C. Eaton) B. L. Rob.	ASTERACEAE	BRICKELLBUSH	native	
Briza maxima L.	POACEAE	QUAKING GRASS	naturalized	
Briza minor L.	POACEAE	QUAKING GRASS	naturalized	
Brodiaea appendiculata Hoover	THEMIDACEAE		native	
Brodiaea californica Lindl.	THEMIDACEAE		native	
Brodiaea californica Lindl. var. californica	THEMIDACEAE		native	
Brodiaea californica Lindl. var. leptandra (Greene) Hoover	THEMIDACEAE		native	
Brodiaea coronaria (Salisb.) Engl.	THEMIDACEAE		native	
Brodiaea coronaria (Salisb.) Engl. subsp. coronaria	THEMIDACEAE		native	
Brodiaea coronaria (Salisb.) Engl. subsp. rosea (Greene) T. F. Niehaus	THEMIDACEAE	INDIAN VALLEY BRODIAEA	native	
Brodiaea elegans Hoover	THEMIDACEAE	HARVEST BRODIAEA	native	
Brodiaea elegans Hoover subsp. elegans	THEMIDACEAE		native	
Brodiaea elegans Hoover subsp. hooveri T. F. Niehaus	THEMIDACEAE		native	
Brodiaea filifolia S. Watson	THEMIDACEAE	THREAD-LEAVED BRODIAEA	native	
Brodiaea insignis (Jeps.) T. F. Niehaus	THEMIDACEAE	KAWEAH BRODIAEA	native	
Brodiaea jolonensis Eastw.	THEMIDACEAE		native	
Brodiaea kinkiensis T. F. Niehaus	THEMIDACEAE	SAN CLEMENTE ISLAND BRODIAEA	native	
Brodiaea minor (Benth.) S. Watson	THEMIDACEAE	DWARF BRODIAEA	native	
Brodiaea orcuttii (Greene) Baker	THEMIDACEAE	ORCUTT'S BRODIAEA	native	
Brodiaea pallida Hoover	THEMIDACEAE	CHINESE CAMP BRODIAEA	native	
Brodiaea purdyi Eastw.	THEMIDACEAE		native	
Brodiaea santarosae T. J. Chester, W. P. Armstr., & Madore	THEMIDACEAE		native	
Brodiaea stellaris S. Watson	THEMIDACEAE		native	
Brodiaea terrestris Kellogg	THEMIDACEAE		native	
Brodiaea terrestris Kellogg subsp. kernensis (Hoover) T. F. Niehaus	THEMIDACEAE		native	
Brodiaea terrestris Kellogg subsp. terrestris	THEMIDACEAE		native	
Bromus alopecuros Poir.	POACEAE	BROME	naturalized	
Bromus anomalus Rupr. ex E. Fourn.	POACEAE	BROME	native	
Bromus arenarius Labill.	POACEAE	BROME	naturalized	
Bromus arizonicus (Shear) Stebbins	POACEAE	BROME	native	
Bromus berteroanus Colla	POACEAE		naturalized	
Bromus briziformis Fisch. & C. A. Mey.	POACEAE	RATTLESNAKE BROME	naturalized	
Bromus carinatus Hook. & Arn.	POACEAE	CALIFORNIA BROME	native	
Bromus carinatus Hook. & Arn. var. carinatus	POACEAE	BROME	native	
Bromus carinatus Hook. & Arn. var. maritimus (Piper) C. L. Hitchc.	POACEAE	BROME	native	
Bromus catharticus Vahl	POACEAE	RESCUE GRASS	naturalized	
Bromus ciliatus L.	POACEAE	FRINGED BROME	native	
Bromus diandrus Roth	POACEAE	RIPGUT GRASS	naturalized	
Bromus grandis (Shear) Hitchc.	POACEAE	BROME	native	
Bromus hordeaceus L.	POACEAE	BROME	naturalized	
Bromus inermis Leyss.	POACEAE	BROME	naturalized	
Bromus inermis Leyss. subsp. inermis	POACEAE	SMOOTH BROME	naturalized	
Bromus japonicus Thunb.	POACEAE	BROME	naturalized	
Bromus laevipes Shear	POACEAE	BROME	native	
Bromus madritensis L.	POACEAE	FOXTAIL CHESS	naturalized	
Bromus madritensis L. subsp. madritensis	POACEAE	BROME	naturalized	
Bromus madritensis L. subsp. rubens (L.) Husn.	POACEAE	BROME	naturalized	
Bromus marginatus Nees ex Steud.	POACEAE		native	
Bromus orcuttianus Vasey	POACEAE	BROME	native	
Bromus richardsonii Link	POACEAE		native	acceptance uncertain
Bromus secalinus L.	POACEAE	BROME	naturalized	
Bromus stamineus E. Desv.	POACEAE	BROME	naturalized	
Bromus sterilis L.	POACEAE	POVERTY BROME	naturalized	
Bromus suksdorfii Vasey	POACEAE	BROME	native	
Bromus tectorum L.	POACEAE	CHEAT GRASS; DOWNY BROME	naturalized	
Bromus trinii E. Desv.	POACEAE	CHILEAN CHESS	naturalized	
Bromus vulgaris (Hook.) Shear	POACEAE	BROME	native	
Buddleja davidii Franch.	BUDDLEJACEAE	BUTTERFLY BUSH; SUMMER LILAC	naturalized	
Buddleja saligna Willd.	BUDDLEJACEAE	BUTTERFLY BUSH	naturalized	
Buddleja utahensis Coville	BUDDLEJACEAE	PANAMINT BUTTERFLY BUSH	native	
Bulbine semibarbata (R. Br.) Haw.	ASPHODELACEAE		naturalized	
Bulbostylis capillaris (L.) C. B. Clarke	CYPERACEAE		native	
Bupleurum lancifolium Hornem.	APIACEAE		naturalized	
Bursera microphylla A. Gray	BURSERACEAE	ELEPHANT TREE	native	
Cabomba caroliniana A. Gray	CABOMBACEAE		naturalized	
Cacaliopsis nardosmia (A. Gray) A. Gray	ASTERACEAE		native	
Caesalpinia gilliesii (Hook.) D. Dietr.	FABACEAE	BIRD-OF-PARADISE	naturalized	
Caesalpinia mexicana A. Gray	FABACEAE		naturalized	acceptance uncertain
Caesalpinia pulcherrima (L.) Sw.	FABACEAE		naturalized	acceptance uncertain
Caesalpinia spinosa (Molina) Kuntze	FABACEAE	TARA	naturalized	
Cakile edentula (Bigelow) Hook.	BRASSICACEAE	SEA ROCKET	naturalized	
Cakile maritima Scop.	BRASSICACEAE	SEA ROCKET	naturalized	
Calamagrostis bolanderi Thurb.	POACEAE	BOLANDER'S REED GRASS	native	
Calamagrostis breweri Thurb.	POACEAE	REED GRASS	native	
Calamagrostis canadensis (Michx.) P. Beauv.	POACEAE	REED GRASS	native	
Calamagrostis foliosa Kearney	POACEAE	LEAFY REED GRASS	native	
Calamagrostis koelerioides Vasey	POACEAE	REED GRASS	native	
Calamagrostis muiriana B. L. Wilson & Sami Gray	POACEAE		native	acceptance uncertain
Calamagrostis nutkaensis (J. Presl) Steud.	POACEAE	REED GRASS	native	
Calamagrostis ophitidis (J. T. Howell) Nygren	POACEAE	SERPENTINE REED GRASS	native	
Calamagrostis purpurascens R. Br.	POACEAE	REED GRASS	native	
Calamagrostis rubescens Buckley	POACEAE	PINE GRASS	native	
Calamagrostis stricta (Timm) Koeler	POACEAE	REED GRASS	native	
Calamagrostis stricta (Timm) Koeler subsp. inexpansa (A. Gray) C. W. Greene	POACEAE	REED GRASS	native	
Calamagrostis stricta (Timm) Koeler subsp. stricta	POACEAE	REED GRASS	native	
Calandrinia breweri S. Watson	MONTIACEAE		native	
Calendula arvensis L.	ASTERACEAE	FIELD-MARIGOLD	naturalized	
Calendula officinalis L.	ASTERACEAE	POT-MARIGOLD	naturalized	
California macrophylla (Hook. & Arn.) J. J. Aldasoro, C. Navarro, P. Vargas, L. Sáez, & C. Aedo	GERANIACEAE		native	
Calliandra eriophylla Benth.	FABACEAE	FAIRYDUSTER	native	
Callitriche fassettii Schotsman			native	acceptance uncertain
Callitriche hermaphroditica L.	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche heterophylla Pursh	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche heterophylla Pursh var. bolanderi (Hegelm.) Fassett	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche heterophylla Pursh var. heterophylla	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche marginata Torr.	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche stagnalis Scop.	CALLITRICHACEAE	WATER-STARWORT	naturalized	
Callitriche trochlearis Fassett	CALLITRICHACEAE	WATER-STARWORT	native	
Callitriche verna L.	CALLITRICHACEAE	WATER-STARWORT	native	
Callitropsis nootkatensis (D. Don) Florin ex. D. P. Little	CUPRESSACEAE		native	
Calocedrus decurrens (Torr.) Florin	CUPRESSACEAE	INCENSE CEDAR	native	
Calochortus albus (Benth.) Douglas ex Benth.	LILIACEAE	FAIRY LANTERN; WHITE GLOBE LILY	native	
Calochortus amabilis Purdy	LILIACEAE	DIOGENES' LANTERN	native	
Calochortus amoenus Greene	LILIACEAE		native	
Calochortus argillosus (Hoover) Zebell & P. L. Fiedl.	LILIACEAE	CLAY MARIPOSA LILY	native	
Calochortus bruneaunis A. Nelson & J. F. Macbr.	LILIACEAE		native	
Calochortus catalinae S. Watson	LILIACEAE	CATALINA MARIPOSA LILY	native	
Calochortus clavatus S. Watson	LILIACEAE		native	
Calochortus clavatus S. Watson var. avius Jeps.	LILIACEAE	PLEASANT VALLEY MARIPOSA LILY	native	
Calochortus clavatus S. Watson var. clavatus	LILIACEAE	CLUB-HAIRED MARIPOSA LILY	native	
Calochortus clavatus S. Watson var. gracilis Ownbey	LILIACEAE	SLENDER MARIPOSA LILY	native	
Calochortus clavatus S. Watson var. pallidus (Hoover) P. L. Fiedl. & Zebell	LILIACEAE		native	
Calochortus clavatus S. Watson var. recurvifolius (Hoover) P. L. Fiedl. & Zebell	LILIACEAE	ARROYO DE LA CRUZ MARIPOSA LILY	native	
Calochortus coeruleus (Kellogg) S. Watson	LILIACEAE	BEAVERTAIL-GRASS	native	
Calochortus concolor (Baker) Purdy	LILIACEAE		native	
Calochortus dunnii Purdy	LILIACEAE	DUNN'S MARIPOSA LILY	native	
Calochortus elegans Pursh	LILIACEAE	CAT'S EAR	native	
Calochortus excavatus Greene	LILIACEAE	INYO COUNTY STAR-TULIP	native	
Calochortus flexuosus S. Watson	LILIACEAE		native	
Calochortus greenei S. Watson	LILIACEAE	GREENE'S MARIPOSA LILY	native	
Calochortus invenustus Greene	LILIACEAE		native	
Calochortus kennedyi Porter	LILIACEAE		native	
Calochortus kennedyi Porter var. kennedyi	LILIACEAE		native	
Calochortus kennedyi Porter var. munzii Jeps.	LILIACEAE		native	
Calochortus leichtlinii Hook. f.	LILIACEAE		native	
Calochortus longebarbatus S. Watson	LILIACEAE		native	
Calochortus longebarbatus S. Watson var. longebarbatus	LILIACEAE	LONG-HAIRED STAR-TULIP	native	
Calochortus luteus Lindl.	LILIACEAE		native	
Calochortus macrocarpus Douglas	LILIACEAE		native	
Calochortus minimus Ownbey	LILIACEAE		native	
Calochortus monophyllus (Lindl.) Lem.	LILIACEAE		native	
Calochortus nudus S. Watson	LILIACEAE		native	
Calochortus obispoensis Lemmon	LILIACEAE	SAN LUIS MARIPOSA LILY	native	
Calochortus palmeri S. Watson	LILIACEAE		native	
Calochortus palmeri S. Watson var. munzii Ownbey	LILIACEAE	MUNZ'S MARIPOSA LILY	native	
Calochortus palmeri S. Watson var. palmeri	LILIACEAE	PALMER'S MARIPOSA LILY	native	
Calochortus panamintensis (Ownbey) Reveal	LILIACEAE	PANAMINT MARIPOSA LILY	native	
Calochortus persistens Ownbey	LILIACEAE	SISKIYOU MARIPOSA LILY	native	
Calochortus plummerae Greene	LILIACEAE	PLUMMER'S MARIPOSA LILY	native	
Calochortus pulchellus (Benth.) A. W. Wood	LILIACEAE	MOUNT DIABLO FAIRY LANTERN	native	
Calochortus raichei Farwig & V. Girard	LILIACEAE	CEDARS FAIRY LANTERN	native	
Calochortus simulans (Hoover) Munz	LILIACEAE	SAN LUIS OBISPO MARIPOSA LILY	native	
Calochortus splendens Benth.	LILIACEAE		native	
Calochortus striatus Parish	LILIACEAE	ALKALI MARIPOSA LILY	native	
Calochortus superbus Purdy ex J. T. Howell	LILIACEAE		native	
Calochortus syntrophus Callahan	LILIACEAE		native	acceptance uncertain
Calochortus tiburonensis A. J. Hill	LILIACEAE	TIBURON MARIPOSA LILY	native	
Calochortus tolmiei Hook. & Arn.	LILIACEAE	PUSSY EARS	native	
Calochortus umbellatus A. W. Wood	LILIACEAE	OAKLAND STAR-TULIP	native	
Calochortus uniflorus Hook. & Arn.	LILIACEAE	LARGE-FLOWERED STAR-TULIP	native	
Calochortus venustus Douglas ex Benth.	LILIACEAE		native	
Calochortus vestae Purdy	LILIACEAE		native	
Calochortus weedii A. W. Wood	LILIACEAE		native	
Calochortus weedii A. W. Wood var. intermedius Ownbey	LILIACEAE		native	
Calochortus weedii A. W. Wood var. vestus Purdy	LILIACEAE		native	
Calochortus weedii A. W. Wood var. weedii	LILIACEAE		native	
Calochortus westonii Eastw.	LILIACEAE	SHIRLEY MEADOWS STAR-TULIP	native	
Caltha leptosepala DC.	RANUNCULACEAE	MARSH MARIGOLD	native	
Caltha palustris L.	RANUNCULACEAE		naturalized	
Calycadenia fremontii A. Gray	ASTERACEAE		native	
Calycadenia hooveri G. D. Carr	ASTERACEAE	HOOVER'S CALYCADENIA	native	
Calycadenia micrantha R. L. Carr & G. D. Carr	ASTERACEAE		native	
Calycadenia mollis A. Gray	ASTERACEAE		native	
Calycadenia multiglandulosa DC.	ASTERACEAE		native	
Calycadenia oppositifolia (Greene) Greene	ASTERACEAE	BUTTE COUNTY CALYCADENIA	native	
Calycadenia pauciflora A. Gray	ASTERACEAE		native	
Calycadenia spicata (Greene) Greene	ASTERACEAE		native	
Calycadenia truncata DC.	ASTERACEAE	ROSIN WEED	native	
Calycadenia truncata DC. subsp. microcephala H. M. Hall ex D. D. Keck	ASTERACEAE		native	acceptance uncertain
Calycadenia villosa DC.	ASTERACEAE	DWARF CALYCADENIA	native	
Calycanthus occidentalis Hook. & Arn.	CALYCANTHACEAE	SPICEBUSH; SWEET-SHRUB	native	
Calycoseris parryi A. Gray	ASTERACEAE		native	
Calycoseris wrightii A. Gray	ASTERACEAE		native	
Calypso bulbosa (L.) Oakes	ORCHIDACEAE	FAIRY SLIPPER	native	
Calypso bulbosa (L.) Oakes var. occidentalis (Holz.) B. Boivin	ORCHIDACEAE		native	
Calyptridium monandrum Nutt.	MONTIACEAE	PUSSYPAWS	native	
Calyptridium monospermum Greene	MONTIACEAE	PUSSYPAWS	native	
Calyptridium parryi A. Gray	MONTIACEAE	PUSSYPAWS	native	
Calyptridium parryi A. Gray var. arizonicum J. T. Howell	MONTIACEAE		native	
Calyptridium parryi A. Gray var. hesseae J. H. Thomas	MONTIACEAE	SANTA CRUZ MOUNTAINS PUSSYPAWS	native	
Calyptridium parryi A. Gray var. nevadense J. T. Howell	MONTIACEAE	PUSSYPAWS	native	
Calyptridium parryi A. Gray var. parryi	MONTIACEAE	PUSSYPAWS	native	
Calyptridium pulchellum (Eastw.) Hoover	MONTIACEAE	MARIPOSA PUSSYPAWS	native	
Calyptridium pygmaeum Parish ex Rydb.	MONTIACEAE	PUSSYPAWS	native	
Calyptridium quadripetalum S. Watson	MONTIACEAE	FOUR-PETALED PUSSYPAWS	native	
Calyptridium roseum S. Watson	MONTIACEAE	PUSSYPAWS	native	
Calyptridium umbellatum (Torr.) Greene	MONTIACEAE	PUSSYPAWS	native	
Calystegia atriplicifolia Hallier f.	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia atriplicifolia Hallier f. subsp. buttensis Brummitt	CONVOLVULACEAE	BUTTE COUNTY MORNING-GLORY	native	
Calystegia collina (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia collina (Greene) Brummitt subsp. collina	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia collina (Greene) Brummitt subsp. oxyphylla Brummitt	CONVOLVULACEAE	MOUNT SAINT HELENA MORNING-GLORY	native	
Calystegia collina (Greene) Brummitt subsp. tridactylosa (Eastw.) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia collina (Greene) Brummitt subsp. venusta Brummitt	CONVOLVULACEAE	SOUTH COAST RANGE MORNING-GLORY	native	
Calystegia longipes (S. Watson) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. amplissima Brummitt	CONVOLVULACEAE	ISLAND MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. arida (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. cyclostegia (House) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. intermedia (Abrams) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. macrostegia	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia macrostegia (Greene) Brummitt subsp. tenuifolia (Abrams) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia malacophylla (Greene) Munz	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia malacophylla (Greene) Munz subsp. malacophylla	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia malacophylla (Greene) Munz subsp. pedicellata (Jeps.) Munz	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia occidentalis (A. Gray) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia occidentalis (A. Gray) Brummitt subsp. fulcrata (A. Gray) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia occidentalis (A. Gray) Brummitt subsp. occidentalis	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia peirsonii (Abrams) Brummitt	CONVOLVULACEAE	PEIRSON'S MORNING-GLORY	native	
Calystegia purpurata (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia purpurata (Greene) Brummitt subsp. purpurata	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia purpurata (Greene) Brummitt subsp. saxicola (Eastw.) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia sepium (L.) R. Br.	CONVOLVULACEAE	HEDGE BINDWEED	native	
Calystegia sepium (L.) R. Br. subsp. binghamiae (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia sepium (L.) R. Br. subsp. limnophila (Greene) Brummitt	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia silvatica (Kit.) Griseb.	CONVOLVULACEAE		naturalized	
Calystegia silvatica (Kit.) Griseb. subsp. disjuncta Brummitt	CONVOLVULACEAE		naturalized	
Calystegia soldanella (L.) R. Br.	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia stebbinsii Brummitt	CONVOLVULACEAE	STEBBINS' MORNING-GLORY	native	
Calystegia subacaulis Hook. & Arn.	CONVOLVULACEAE	MORNING-GLORY	native	
Calystegia subacaulis Hook. & Arn. subsp. episcopalis Brummitt	CONVOLVULACEAE	SAN LUIS OBISPO COUNTY MORNING-GLORY	native	
Calystegia subacaulis Hook. & Arn. subsp. subacaulis	CONVOLVULACEAE	MORNING-GLORY	native	
Camassia leichtlinii (Baker) S. Watson	AGAVACEAE		native	
Camassia leichtlinii (Baker) S. Watson subsp. suksdorfii (Greenm.) Gould	AGAVACEAE		native	
Camassia quamash (Pursh) Greene	AGAVACEAE	CAMAS	native	
Camassia quamash (Pursh) Greene subsp. breviflora Gould	AGAVACEAE	CAMAS	native	
Camelina microcarpa Andrz. ex DC.	BRASSICACEAE	FALSE FLAX	naturalized	
Camissonia andina (Nutt.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia arenaria (A. Nelson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia benitensis P. H. Raven	ONAGRACEAE	SAN BENITO EVENING PRIMROSE	native	
Camissonia bistorta (Torr. & A. Gray) P. H. Raven	ONAGRACEAE	CALIFORNIA SUN CUP	native	
Camissonia boothii (Douglas) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia boothii (Douglas) P. H. Raven subsp. alyssoides (Hook. & Arn.) P. H. Raven	ONAGRACEAE	PINE CREEK EVENING PRIMROSE	native	
Camissonia boothii (Douglas) P. H. Raven subsp. boothii	ONAGRACEAE	BOOTH'S EVENING PRIMROSE	native	
Camissonia boothii (Douglas) P. H. Raven subsp. condensata (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia boothii (Douglas) P. H. Raven subsp. decorticans (Hook. & Arn.) P. H. Raven	ONAGRACEAE	SHREDDING EVENING PRIMROSE	native	
Camissonia boothii (Douglas) P. H. Raven subsp. desertorum (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia boothii (Douglas) P. H. Raven subsp. intermedia (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia brevipes (A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia brevipes (A. Gray) P. H. Raven subsp. arizonica (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia brevipes (A. Gray) P. H. Raven subsp. brevipes	ONAGRACEAE	SUN CUP	native	
Camissonia brevipes (A. Gray) P. H. Raven subsp. pallidula (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia californica (Torr. & A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia campestris (Greene) P. H. Raven	ONAGRACEAE	MOJAVE SUN CUP	native	
Camissonia campestris (Greene) P. H. Raven subsp. campestris	ONAGRACEAE	SUN CUP	native	
Camissonia campestris (Greene) P. H. Raven subsp. obispoensis P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia cardiophylla (Torr.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia cardiophylla (Torr.) P. H. Raven subsp. cardiophylla	ONAGRACEAE	SUN CUP	native	
Camissonia cardiophylla (Torr.) P. H. Raven subsp. robusta (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia chamaenerioides (A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia cheiranthifolia (Spreng.) Raim.	ONAGRACEAE	BEACH EVENING PRIMROSE	native	
Camissonia cheiranthifolia (Spreng.) Raim. subsp. cheiranthifolia	ONAGRACEAE	SUN CUP	native	
Camissonia cheiranthifolia (Spreng.) Raim. subsp. suffruticosa (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. aurantiaca (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. claviformis	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. cruciformis (Kellogg) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. funerea (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. integrior (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. lancifolia (A. Heller) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. peirsonii (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia claviformis (Torr. & Frém.) P. H. Raven subsp. yumae (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia confusa P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia contorta (Douglas) Kearney	ONAGRACEAE	SUN CUP	native	
Camissonia graciliflora (Hook. & Arn.) P. H. Raven	ONAGRACEAE	HILL SUN CUP	native	
Camissonia guadalupensis (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia guadalupensis (S. Watson) P. H. Raven subsp. clementina (P. H. Raven) P. H. Raven	ONAGRACEAE	SAN CLEMENTE ISLAND EVENING PRIMROSE	native	
Camissonia hardhamiae P. H. Raven	ONAGRACEAE	HARDHAM'S EVENING PRIMROSE	native	
Camissonia heterochroma (S. Watson) P. H. Raven	ONAGRACEAE	SHOCKLEY'S EVENING PRIMROSE	native	
Camissonia hirtella (Greene) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia ignota (Jeps.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia integrifolia P. H. Raven	ONAGRACEAE	KERN RIVER EVENING PRIMROSE	native	
Camissonia intermedia P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia kernensis (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia kernensis (Munz) P. H. Raven subsp. gilmanii (Munz) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia kernensis (Munz) P. H. Raven subsp. kernensis	ONAGRACEAE	KERN COUNTY EVENING PRIMROSE	native	
Camissonia lacustris P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia lewisii P. H. Raven	ONAGRACEAE	LEWIS' EVENING PRIMROSE	native	
Camissonia luciae P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia micrantha (Spreng.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia minor (A. Nelson) P. H. Raven	ONAGRACEAE	NELSON'S EVENING PRIMROSE	native	
Camissonia munzii (P. H. Raven) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia ovata (Torr. & A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pallida (Abrams) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pallida (Abrams) P. H. Raven subsp. hallii (Davidson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pallida (Abrams) P. H. Raven subsp. pallida	ONAGRACEAE	SUN CUP	native	
Camissonia palmeri (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia parvula (Torr. & A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pterosperma (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pubens (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia pusilla P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia refracta (S. Watson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia robusta P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia sierrae P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia sierrae P. H. Raven subsp. alticola P. H. Raven	ONAGRACEAE	MONO HOT SPRINGS EVENING PRIMROSE	native	
Camissonia sierrae P. H. Raven subsp. sierrae	ONAGRACEAE	SUN CUP	native	
Camissonia strigulosa (Fisch. & C. A. Mey.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia subacaulis (Pursh) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia tanacetifolia (Torr. & A. Gray) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia tanacetifolia (Torr. & A. Gray) P. H. Raven subsp. quadriperforata P. H. Raven	ONAGRACEAE	SIERRA VALLEY EVENING PRIMROSE	native	
Camissonia tanacetifolia (Torr. & A. Gray) P. H. Raven subsp. tanacetifolia	ONAGRACEAE	SUN CUP	native	
Camissonia walkeri (A. Nelson) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Camissonia walkeri (A. Nelson) P. H. Raven subsp. tortilis (Jeps.) P. H. Raven	ONAGRACEAE	SUN CUP	native	
Campanula angustiflora Eastw.	CAMPANULACEAE	HAREBELL	native	
Campanula californica (Kellogg) A. Heller	CAMPANULACEAE	SWAMP HAREBELL	native	
Campanula exigua Rattan	CAMPANULACEAE	CHAPARRAL HAREBELL	native	
Campanula griffinii Morin	CAMPANULACEAE	HAREBELL	native	
Campanula rotundifolia L.	CAMPANULACEAE	HAREBELL	native	
Campanula scabrella Engelm.	CAMPANULACEAE	ROUGH HAREBELL	native	
Campanula scouleri A. DC.	CAMPANULACEAE	SCOULER'S HAREBELL	native	
Campanula sharsmithiae Morin	CAMPANULACEAE	SHARSMITH'S HAREBELL	native	
Campanula shetleri Heckard	CAMPANULACEAE	CASTLE CRAGS HAREBELL	native	
Campanula wilkinsiana Greene	CAMPANULACEAE	WILKINS' HAREBELL	native	
Canbya candida Parry ex A. Gray	PAPAVERACEAE		native	
Cannabis sativa L.	CANNABACEAE	ETC.; GRASS; HEMP; MARIJUANA; POT	naturalized	
Capsella bursa-pastoris (L.) Medik.	BRASSICACEAE	SHEPHERD'S PURSE	naturalized	
Cardamine angulata Hook.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine bellidifolia L.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine bellidifolia L. var. pachyphylla Coville & Leiberg	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine breweri S. Watson	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine breweri S. Watson var. breweri	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine breweri S. Watson var. orbicularis (Greene) Detling	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine californica (Nutt.) Greene	BRASSICACEAE	MILK MAIDS; TOOTH WORT	native	
Cardamine californica (Nutt.) Greene var. californica	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine californica (Nutt.) Greene var. cardiophylla (Greene) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine californica (Nutt.) Greene var. cuneata (Greene) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine californica (Nutt.) Greene var. integrifolia (Nutt.) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine californica (Nutt.) Greene var. sinuata (Greene) O. E. Schulz	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine cordifolia A. Gray	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine cordifolia A. Gray var. lyallii (S. Watson) A. Nelson & J. F. Macbr.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine flexuosa With.	BRASSICACEAE		naturalized	acceptance uncertain
Cardamine hirsuta L.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	naturalized	
Cardamine nuttallii Greene	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine nuttallii Greene var. covilleana (O. E. Schulz) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine nuttallii Greene var. dissecta (O. E. Schulz) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine nuttallii Greene var. gemmata (Greene) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine nuttallii Greene var. nuttallii	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine occidentalis (S. Watson) Howell	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine oligosperma Nutt.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine pachystigma (S. Watson) Rollins	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine pachystigma (S. Watson) Rollins var. dissectifolia (Detling) Rollins	BRASSICACEAE	DISSECTED-LEAF TOOTHWORT	native	
Cardamine pachystigma (S. Watson) Rollins var. pachystigma	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardamine pensylvanica Muhl. ex Willd.	BRASSICACEAE	BITTER-CRESS; TOOTHWORT	native	
Cardionema ramosissimum (Weinm.) A. Nelson & J. F. Macbr.	CARYOPHYLLACEAE		native	
Carduus acanthoides L.	ASTERACEAE	PLUMELESS THISTLE	naturalized	
Carduus nutans L.	ASTERACEAE	MUSK THISTLE	naturalized	
Carduus pycnocephalus L.	ASTERACEAE	ITALIAN THISTLE	naturalized	
Carduus tenuiflorus Curtis	ASTERACEAE	PLUMELESS THISTLE	naturalized	
Carex abrupta Mack.	CYPERACEAE	ABRUPT-BEAKED SEDGE	native	
Carex albida L. H. Bailey	CYPERACEAE	WHITE SEDGE	native	
Carex albonigra Mack.	CYPERACEAE	SEDGE	native	
Carex alma L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex amplectens Mack.	CYPERACEAE	SEDGE	native	
Carex amplifolia Boott	CYPERACEAE	SEDGE	native	
Carex angustata Boott	CYPERACEAE	SEDGE	native	
Carex aquatilis Wahlenb.	CYPERACEAE	SEDGE	native	
Carex aquatilis Wahlenb. var. aquatilis	CYPERACEAE	SEDGE	native	
Carex aquatilis Wahlenb. var. dives (T. Holm) Kük.	CYPERACEAE	SEDGE	native	
Carex arcta Boott	CYPERACEAE	SEDGE	native	
Carex atherodes Spreng.	CYPERACEAE	SEDGE	native	
Carex athrostachya Olney	CYPERACEAE	SEDGE	native	
Carex aurea Nutt.	CYPERACEAE	SEDGE	native	
Carex barbarae Dewey	CYPERACEAE	SEDGE	native	
Carex bella L. H. Bailey	CYPERACEAE		native	acceptance uncertain
Carex bolanderi Olney	CYPERACEAE	SEDGE	native	
Carex brainerdii Mack.	CYPERACEAE	SEDGE	native	
Carex brevicaulis Mack.	CYPERACEAE	SEDGE	native	
Carex breweri Boott	CYPERACEAE	SEDGE	native	
Carex breweri Boott var. breweri	CYPERACEAE	SEDGE	native	
Carex buxbaumii Wahlenb.	CYPERACEAE	SEDGE	native	
Carex californica L. H. Bailey	CYPERACEAE	CALIFORNIA SEDGE	native	
Carex canescens L.	CYPERACEAE	SEDGE	native	
Carex capitata L.	CYPERACEAE	SEDGE	native	
Carex comosa Boott	CYPERACEAE	SEDGE	native	
Carex concinnoides Mack.	CYPERACEAE	SEDGE	native	
Carex congdonii L. H. Bailey	CYPERACEAE	CONGDON'S SEDGE	native	
Carex cusickii Mack. ex Piper & Beattie	CYPERACEAE	SEDGE	native	
Carex davyi Mack.	CYPERACEAE	DAVY'S SEDGE	native	
Carex densa (L. H. Bailey) L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex deweyana Schwein.	CYPERACEAE	SEDGE	native	
Carex deweyana Schwein. subsp. leptopoda (Mack.) Calder & Roy L. Taylor	CYPERACEAE	SEDGE	native	
Carex diandra Schrank	CYPERACEAE	SEDGE	native	
Carex disperma Dewey	CYPERACEAE	SEDGE	native	
Carex douglasii Boott	CYPERACEAE	SEDGE	native	
Carex dudleyi Mack.	CYPERACEAE	SEDGE	native	
Carex echinata Murray	CYPERACEAE	SEDGE	native	
Carex echinata Murray subsp. echinata	CYPERACEAE	SEDGE	native	
Carex echinata Murray subsp. phyllomanica (W. Boott) Reznicek	CYPERACEAE	SEDGE	native	
Carex eleocharis L. H. Bailey	CYPERACEAE	SPIKERUSH SEDGE	native	acceptance uncertain
Carex feta L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex filifolia Nutt.	CYPERACEAE	SEDGE	native	
Carex filifolia Nutt. var. erostrata Kük.	CYPERACEAE	SEDGE	native	
Carex filifolia Nutt. var. filifolia	CYPERACEAE	SEDGE	native	
Carex fissuricola Mack.	CYPERACEAE	SEDGE	native	
Carex fracta Mack.	CYPERACEAE	SEDGE	native	
Carex garberi Fernald	CYPERACEAE	SEDGE	native	
Carex geyeri Boott	CYPERACEAE	ELK SEDGE; GEYER'S SEDGE	native	
Carex globosa Boott	CYPERACEAE	SEDGE	native	
Carex gracilior Mack.	CYPERACEAE	SEDGE	native	
Carex gynodynama Olney	CYPERACEAE	SEDGE	native	
Carex halliana L. H. Bailey	CYPERACEAE	HALL'S SEDGE	native	
Carex harfordii Mack.	CYPERACEAE	SEDGE	native	
Carex hassei L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex haydeniana Olney	CYPERACEAE	SEDGE	native	
Carex helleri Mack.	CYPERACEAE	SEDGE	native	
Carex hendersonii L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex heteroneura W. Boott	CYPERACEAE	SEDGE	native	
Carex heteroneura W. Boott var. epapillosa (Mack.) F. J. Herm.	CYPERACEAE	SEDGE	native	
Carex heteroneura W. Boott var. heteroneura	CYPERACEAE	SEDGE	native	
Carex hirtissima W. Boott	CYPERACEAE	SEDGE	native	
Carex hoodii Boott	CYPERACEAE	SEDGE	native	
Carex hystericina Muhl. ex Willd.	CYPERACEAE	BOTTLEBRUSH SEDGE	native	
Carex illota L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex incurviformis Mack.	CYPERACEAE	SEDGE	native	
Carex incurviformis Mack. var. danaensis (Stacey) F. J. Herm.	CYPERACEAE	SEDGE	native	
Carex infirminervia Naczi	CYPERACEAE		native	acceptance uncertain
Carex inops L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex inops L. H. Bailey subsp. inops	CYPERACEAE	SEDGE	native	
Carex integra Mack.	CYPERACEAE	SEDGE	native	
Carex interior L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex jonesii L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex klamathensis B.L. Wilson & Janeway	CYPERACEAE		native	acceptance uncertain
Carex laeviculmis Meinsh.	CYPERACEAE	SEDGE	native	
Carex lasiocarpa Ehrh.	CYPERACEAE	SLENDER SEDGE	native	
Carex leavenworthii Dewey	CYPERACEAE	SEDGE	naturalized	
Carex lemmonii W. Boott	CYPERACEAE	SEDGE	native	
Carex lenticularis Michx.	CYPERACEAE	SEDGE	native	
Carex lenticularis Michx. var. impressa (L. H. Bailey) L. A. Standl.	CYPERACEAE	SEDGE	native	
Carex lenticularis Michx. var. limnophila (T. Holm) Cronquist	CYPERACEAE	SEDGE	native	
Carex lenticularis Michx. var. lipocarpa (T. Holm) L. A. Standl.	CYPERACEAE	SEDGE	native	
Carex leporinella Mack.	CYPERACEAE	SEDGE	native	
Carex leptalea Wahlenb.	CYPERACEAE	FLACCID SEDGE	native	
Carex limosa L.	CYPERACEAE	SEDGE	native	
Carex livida (Wahlenb.) Willd.	CYPERACEAE	LIVID SEDGE; PALE SEDGE	native	
Carex luzulifolia W. Boott	CYPERACEAE	SEDGE	native	
Carex luzulina Olney	CYPERACEAE	SEDGE	native	
Carex luzulina Olney var. ablata (L. H. Bailey) F. J. Herm.	CYPERACEAE	SEDGE	native	
Carex luzulina Olney var. luzulina	CYPERACEAE	SEDGE	native	
Carex lyngbyei Hornem.	CYPERACEAE	SEDGE	native	
Carex mariposana L. H. Bailey ex Mack.	CYPERACEAE	SEDGE	native	
Carex mendocinensis Olney ex W. Boott	CYPERACEAE	SEDGE	native	
Carex mertensii J. D. Prescott ex Bong.	CYPERACEAE	SEDGE	native	
Carex mesochorea Mack.	CYPERACEAE		naturalized	acceptance uncertain
Carex microptera Mack.	CYPERACEAE	SEDGE	native	
Carex molesta Mack. ex Bright	CYPERACEAE	SEDGE	naturalized	
Carex multicaulis L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex multicostata Mack.	CYPERACEAE	SEDGE	native	
Carex nebrascensis Dewey	CYPERACEAE	SEDGE	native	
Carex nervina L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex neurophora Mack.	CYPERACEAE	SEDGE	native	
Carex nigricans C. A. Mey.	CYPERACEAE	SEDGE	native	
Carex nudata W. Boott	CYPERACEAE	SEDGE	native	
Carex obispoensis Stacey	CYPERACEAE	SAN LUIS SEDGE	native	
Carex obnupta L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex occidentalis L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex ovalis Gooden.	CYPERACEAE	SEDGE	native	
Carex pachystachya Cham. ex Steud.	CYPERACEAE	SEDGE	native	
Carex pansa L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex parryana Dewey	CYPERACEAE	SEDGE	native	
Carex pellita Muhl. ex Willd.	CYPERACEAE	WOOLLY SEDGE	native	
Carex pendula Huds.	CYPERACEAE		naturalized	acceptance uncertain
Carex petasata Dewey	CYPERACEAE	LIDDON'S SEDGE	native	
Carex phaeocephala Piper	CYPERACEAE	SEDGE	native	
Carex praeceptorum Mack.	CYPERACEAE	SEDGE	native	
Carex praegracilis W. Boott	CYPERACEAE	SEDGE	native	
Carex praticola Rydb.	CYPERACEAE	MEADOW SEDGE	native	
Carex preslii Steud.	CYPERACEAE	SEDGE	native	
Carex proposita Mack.	CYPERACEAE	SEDGE	native	
Carex raynoldsii Dewey	CYPERACEAE	SEDGE	native	
Carex retroflexa Willd.	CYPERACEAE	SEDGE	naturalized	
Carex retroflexa Willd. var. texensis (Torr. ex L. H. Bailey) Fernald	CYPERACEAE	SEDGE	naturalized	acceptance uncertain
Carex rossii Boott	CYPERACEAE	SEDGE	native	
Carex saliniformis Mack.	CYPERACEAE	SEDGE	native	
Carex sartwelliana Olney	CYPERACEAE	SEDGE	native	
Carex schottii Dewey	CYPERACEAE	SEDGE	native	
Carex scirpoidea Michx.	CYPERACEAE	SEDGE	native	
Carex scirpoidea Michx. var. pseudoscirpoidea (Rydb.) Cronquist	CYPERACEAE	SEDGE	native	
Carex scoparia Schkuhr ex Willd.	CYPERACEAE	POINTED BROOM-SEDGE	native	
Carex scopulorum T. Holm	CYPERACEAE	SEDGE	native	
Carex scopulorum T. Holm var. bracteosa (L. H. Bailey) F. J. Herm.	CYPERACEAE	SEDGE	native	
Carex senta Boott	CYPERACEAE	SEDGE	native	
Carex serpenticola Zika	CYPERACEAE		native	acceptance uncertain
Carex serratodens W. Boott	CYPERACEAE	SEDGE	native	
Carex sheldonii Mack.	CYPERACEAE	SHELDON'S SEDGE	native	
Carex simulata Mack.	CYPERACEAE	SEDGE	native	
Carex specifica L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex spectabilis Dewey	CYPERACEAE	SEDGE	native	
Carex spissa L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex stipata Muhl. ex Willd.	CYPERACEAE	SEDGE	native	
Carex stipata Muhl. ex Willd. var. stipata	CYPERACEAE	SEDGE	native	
Carex straminiformis L. H. Bailey	CYPERACEAE	MOUNT SHASTA SEDGE	native	
Carex subbracteata Mack.	CYPERACEAE	SEDGE	native	
Carex subfusca W. Boott	CYPERACEAE	SEDGE	native	
Carex subnigricans Stacey	CYPERACEAE	SEDGE	native	
Carex tahoensis Smiley	CYPERACEAE	SEDGE	native	
Carex tiogana D. W. Taylor & J. D. Mastrog.	CYPERACEAE	TIOGA SEDGE	native	
Carex tompkinsii J. T. Howell	CYPERACEAE	TOMPKINS' SEDGE	native	
Carex triquetra Boott	CYPERACEAE	SEDGE	native	
Carex tumulicola Mack.	CYPERACEAE	SEDGE	native	
Carex unilateralis Mack.	CYPERACEAE	SEDGE	native	
Carex utriculata Boott	CYPERACEAE	SEDGE	native	
Carex vallicola Dewey	CYPERACEAE	SEDGE	native	
Carex vernacula L. H. Bailey	CYPERACEAE	SEDGE	native	
Carex vesicaria L.	CYPERACEAE	SEDGE	native	
Carex vesicaria L. var. major Boott	CYPERACEAE	SEDGE	native	acceptance uncertain
Carex vesicaria L. var. vesicaria	CYPERACEAE	SEDGE	native	acceptance uncertain
Carex viridula Michx.	CYPERACEAE	SEDGE	native	
Carex viridula Michx. var. viridula	CYPERACEAE	SEDGE	native	
Carex vulpinoidea Michx.	CYPERACEAE	FOX SEDGE	native	
Carex whitneyi Olney	CYPERACEAE	SEDGE	native	
Carlowrightia arizonica A. Gray	ACANTHACEAE	ARIZONA CARLOWRIGHTIA	native	
Carlquistia muirii (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Carnegiea gigantea (Engelm.) Britton & Rose	CACTACEAE	SAGUARO	native	
Carpenteria californica Torr.	PHILADELPHACEAE	TREE-ANEMONE	native	
Carpobrotus chilensis (Molina) N. E. Br.	AIZOACEAE	SEA FIG	naturalized	
Carpobrotus edulis (L.) N. E. Br.	AIZOACEAE	FIG-MARIGOLD	naturalized	
Carthamus baeticus (Boiss. & Reut.) Nyman	ASTERACEAE	SMOOTH DISTAFF THISTLE	naturalized	
Carthamus lanatus L.	ASTERACEAE	WOOLLY DISTAFF THISTLE	naturalized	
Carthamus leucocaulos Sibth. & Sm.	ASTERACEAE	WHITESTEM DISTAFF THISTLE	naturalized	
Carthamus tinctorius L.	ASTERACEAE	SAFFLOWER	naturalized	
Carya illinoinensis (Wangenh.) K. Koch	JUGLANDACEAE		naturalized	
Cassiope mertensiana (Bong.) G. Don	ERICACEAE	WHITE HEATHER	native	
Castela emoryi (A. Gray) Moran & Felger	SIMAROUBACEAE	CRUCIFIXION THORN	native	
Castilleja affinis Hook. & Arn.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja affinis Hook. & Arn. subsp. affinis	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja affinis Hook. & Arn. subsp. litoralis (Pennell) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja affinis Hook. & Arn. subsp. neglecta (E. M. Zeile) T. I. Chuang & Heckard	SCROPHULARIACEAE	TIBURON INDIAN PAINTBRUSH	native	
Castilleja ambigua Hook. & Arn.	SCROPHULARIACEAE	JOHNNY-NIP	native	
Castilleja ambigua Hook. & Arn. subsp. ambigua	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja ambigua Hook. & Arn. subsp. humboldtiensis (D. D. Keck) T. I. Chuang & Heckard	SCROPHULARIACEAE	HUMBOLDT BAY OWL'S-CLOVER	native	
Castilleja ambigua Hook. & Arn. subsp. insalutata (Jeps.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja angustifolia (Nutt.) G. Don	SCROPHULARIACEAE	DESERT INDIAN PAINTBRUSH	native	
Castilleja applegatei Fernald	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja applegatei Fernald subsp. disticha (Eastw.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja applegatei Fernald subsp. martinii (Abrams) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja applegatei Fernald subsp. pallida (Eastw.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja applegatei Fernald subsp. pinetorum (Fernald) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja arachnoidea Greenm.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja attenuata (A. Gray) T. I. Chuang & Heckard	SCROPHULARIACEAE	VALLEY TASSELS	native	
Castilleja brevistyla (Hoover) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja campestris (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja campestris (Benth.) T. I. Chuang & Heckard subsp. campestris	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja campestris (Benth.) T. I. Chuang & Heckard subsp. succulenta (Hoover) T. I. Chuang & Heckard	SCROPHULARIACEAE	SUCCULENT OWL'S-CLOVER	native	
Castilleja cinerea A. Gray	SCROPHULARIACEAE	ASH-GRAY INDIAN PAINTBRUSH	native	
Castilleja densiflora (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja densiflora (Benth.) T. I. Chuang & Heckard subsp. densiflora	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja densiflora (Benth.) T. I. Chuang & Heckard subsp. gracilis (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja densiflora (Benth.) T. I. Chuang & Heckard subsp. obispoensis (D. D. Keck) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja exserta (A. Heller) T. I. Chuang & Heckard	SCROPHULARIACEAE	PURPLE OWL'S-CLOVER	native	
Castilleja exserta (A. Heller) T. I. Chuang & Heckard subsp. exserta	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja exserta (A. Heller) T. I. Chuang & Heckard subsp. latifolia (S. Watson) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja exserta (A. Heller) T. I. Chuang & Heckard subsp. venusta (A. Heller) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja foliolosa Hook. & Arn.	SCROPHULARIACEAE	WOOLLY INDIAN PAINTBRUSH	native	
Castilleja grisea Dunkle	SCROPHULARIACEAE	SAN CLEMENTE ISLAND INDIAN PAINTBRUSH	native	
Castilleja hispida Benth.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja hispida Benth. subsp. brevilobata (Piper) T. I. Chuang & Heckard	SCROPHULARIACEAE	SHORT-LOBED INDIAN PAINTBRUSH	native	
Castilleja lacera (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja lanata A. Gray	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja lanata A. Gray subsp. hololeuca (Greene) T. I. Chuang & Heckard	SCROPHULARIACEAE	WHITE-FELTED INDIAN PAINTBRUSH	native	
Castilleja lasiorhyncha (A. Gray) T. I. Chuang & Heckard	SCROPHULARIACEAE	SAN BERNARDINO MOUNTAINS OWL'S-CLOVER	native	
Castilleja latifolia Hook. & Arn.	SCROPHULARIACEAE	MONTEREY INDIAN PAINTBRUSH	native	
Castilleja lemmonii A. Gray	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja linariifolia Benth.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja lineariloba (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja mendocinensis (Eastw.) Pennell	SCROPHULARIACEAE	MENDOCINO COAST INDIAN PAINTBRUSH	native	
Castilleja miniata Hook.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja miniata Hook. subsp. elata (Piper) Munz	SCROPHULARIACEAE	SISKIYOU INDIAN PAINTBRUSH	native	
Castilleja miniata Hook. subsp. miniata	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja minor (A. Gray) A. Gray	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja minor (A. Gray) A. Gray subsp. minor	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja minor (A. Gray) A. Gray subsp. spiralis (Jeps.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja mollis Pennell	SCROPHULARIACEAE	SOFT-LEAVED INDIAN PAINTBRUSH	native	
Castilleja nana Eastw.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja parviflora Bong.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja pilosa (S. Watson) Rydb.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja plagiotoma A. Gray	SCROPHULARIACEAE	MOJAVE INDIAN PAINTBRUSH	native	
Castilleja praeterita Heckard & Bacig.	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja pruinosa Fernald	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja rubicundula (Jeps.) T. I. Chuang & Heckard	SCROPHULARIACEAE	CREAM SACS	native	
Castilleja rubicundula (Jeps.) T. I. Chuang & Heckard subsp. lithospermoides (Benth.) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja rubicundula (Jeps.) T. I. Chuang & Heckard subsp. rubicundula	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja schizotricha Greenm.	SCROPHULARIACEAE	SPLIT-HAIR INDIAN PAINTBRUSH	native	
Castilleja subinclusa Greene	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja subinclusa Greene subsp. franciscana (Pennell) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja subinclusa Greene subsp. subinclusa	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja tenuis (A. Heller) T. I. Chuang & Heckard	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Castilleja wightii Elmer	SCROPHULARIACEAE	INDIAN PAINTBRUSH; OWL'S-CLOVER	native	
Catalpa bignonioides Walter	BIGNONIACEAE		naturalized	
Catalpa speciosa (Warder) Warder ex Engelm.	BIGNONIACEAE		naturalized	
Caulanthus amplexicaulis S. Watson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus amplexicaulis S. Watson var. amplexicaulis	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus amplexicaulis S. Watson var. barbarae (J. T. Howell) Munz	BRASSICACEAE	SANTA BARBARA JEWELFLOWER	native	
Caulanthus anceps Payson	BRASSICACEAE		native	
Caulanthus californicus (S. Watson) Payson	BRASSICACEAE	CALIFORNIA JEWELFLOWER	native	
Caulanthus cooperi (S. Watson) Payson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus coulteri S. Watson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus coulteri S. Watson var. coulteri	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus crassicaulis (Torr.) S. Watson	BRASSICACEAE	THICK-STEM WILD CABBAGE	native	
Caulanthus crassicaulis (Torr.) S. Watson var. crassicaulis	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus crassicaulis (Torr.) S. Watson var. glaber M. E. Jones	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus glaucus S. Watson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus hallii Payson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus heterophyllus (Nutt.) Payson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus heterophyllus (Nutt.) Payson var. heterophyllus	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus inflatus S. Watson	BRASSICACEAE	DESERT CANDLE	native	
Caulanthus lemmonii S. Watson	BRASSICACEAE		native	
Caulanthus major (M. E. Jones) Payson	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus major (M. E. Jones) Payson var. major	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus major (M. E. Jones) Payson var. nevadensis Rollins	BRASSICACEAE	JEWELFLOWER	native	
Caulanthus pilosus S. Watson	BRASSICACEAE	CHOCOLATE DROPS; HAIRY WILD CABBAGE	native	
Caulanthus simulans Payson	BRASSICACEAE	PAYSON'S JEWELFLOWER	native	
Caulostramina jaegeri (Rollins) Rollins	BRASSICACEAE	JAEGER'S CAULOSTRAMINA	native	
Ceanothus arboreus Greene	RHAMNACEAE	FELTLEAF CEANOTHUS	native	
Ceanothus confusus J. T. Howell	RHAMNACEAE	RINCON RIDGE CEANOTHUS	native	
Ceanothus cordulatus Kellogg	RHAMNACEAE	MOUNTAIN WHITETHORN	native	
Ceanothus crassifolius Torr.	RHAMNACEAE	HOARYLEAF CEANOTHUS	native	
Ceanothus cuneatus Nutt.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus cuneatus Nutt. var. cuneatus	RHAMNACEAE	BUCK BRUSH	native	
Ceanothus cuneatus Nutt. var. fascicularis (McMinn) Hoover	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus cuneatus Nutt. var. rigidus (Nutt.) Hoover	RHAMNACEAE	MONTEREY CEANOTHUS	native	
Ceanothus cyaneus Eastw.	RHAMNACEAE	LAKESIDE CEANOTHUS	native	
Ceanothus dentatus Torr. & A. Gray	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus divergens Parry	RHAMNACEAE	CALISTOGA CEANOTHUS	native	
Ceanothus diversifolius Kellogg	RHAMNACEAE	PINE MAT	native	
Ceanothus ferrisiae McMinn	RHAMNACEAE	COYOTE CEANOTHUS	native	
Ceanothus foliosus Parry	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus foliosus Parry var. foliosus	RHAMNACEAE	WAVYLEAF CEANOTHUS	native	
Ceanothus foliosus Parry var. medius McMinn	RHAMNACEAE	LA CUESTA CEANOTHUS	native	
Ceanothus foliosus Parry var. vineatus McMinn	RHAMNACEAE	VINE HILL CEANOTHUS	native	
Ceanothus fresnensis Abrams	RHAMNACEAE	FRESNO MAT	native	
Ceanothus gloriosus J. T. Howell	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus gloriosus J. T. Howell var. exaltatus J. T. Howell	RHAMNACEAE	GLORY BRUSH	native	
Ceanothus gloriosus J. T. Howell var. gloriosus	RHAMNACEAE	GLORY MAT; POINT REYES CEANOTHUS	native	
Ceanothus gloriosus J. T. Howell var. porrectus J. T. Howell	RHAMNACEAE	MOUNT VISION CEANOTHUS	native	
Ceanothus greggii A. Gray	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus greggii A. Gray var. perplexans (Trel.) Jeps.	RHAMNACEAE	CUPLEAF CEANOTHUS	native	
Ceanothus greggii A. Gray var. vestitus (Greene) McMinn	RHAMNACEAE	MOJAVE CEANOTHUS	native	
Ceanothus griseus (Trel.) McMinn	RHAMNACEAE	CARMEL CEANOTHUS	native	
Ceanothus hearstiorum Hoover & Roof	RHAMNACEAE	HEARST'S CEANOTHUS	native	
Ceanothus impressus Trel.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus incanus Torr. & A. Gray	RHAMNACEAE	COAST WHITETHORN	native	
Ceanothus integerrimus Hook. & Arn.	RHAMNACEAE	DEER BRUSH	native	
Ceanothus jepsonii Greene	RHAMNACEAE	MUSK BRUSH	native	
Ceanothus jepsonii Greene var. albiflorus J. T. Howell	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus jepsonii Greene var. jepsonii	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus lemmonii Parry	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus leucodermis Greene	RHAMNACEAE	CHAPARRAL WHITETHORN	native	
Ceanothus maritimus Hoover	RHAMNACEAE	MARITIME CEANOTHUS	native	
Ceanothus masonii McMinn	RHAMNACEAE	MASON'S CEANOTHUS	native	
Ceanothus megacarpus Nutt.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus megacarpus Nutt. var. insularis (Eastw.) Munz	RHAMNACEAE	ISLAND CEANOTHUS	native	
Ceanothus megacarpus Nutt. var. megacarpus	RHAMNACEAE	BIGPOD CEANOTHUS	native	
Ceanothus oliganthus Nutt.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus oliganthus Nutt. var. oliganthus	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus oliganthus Nutt. var. sorediatus (Hook. & Arn.) Hoover	RHAMNACEAE	JIM BRUSH	native	
Ceanothus ophiochilus S. Boyd, T. S. Ross & Arnseth	RHAMNACEAE	VAIL LAKE CEANOTHUS	native	
Ceanothus palmeri Trel.	RHAMNACEAE	PALMER CEANOTHUS	native	
Ceanothus papillosus Torr. & A. Gray	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus papillosus Torr. & A. Gray var. papillosus	RHAMNACEAE	WARTLEAF CEANOTHUS	native	
Ceanothus papillosus Torr. & A. Gray var. roweanus McMinn	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus parryi Trel.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus parvifolius (S. Watson) Trel.	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus pinetorum Coville	RHAMNACEAE	KERN CEANOTHUS	native	
Ceanothus prostratus Benth.	RHAMNACEAE	MAHALA MAT	native	
Ceanothus prostratus Benth. var. occidentalis McMinn	RHAMNACEAE		native	
Ceanothus prostratus Benth. var. prostratus	RHAMNACEAE		native	
Ceanothus pumilus Greene	RHAMNACEAE	SISKIYOU MAT	native	
Ceanothus purpureus Jeps.	RHAMNACEAE	HOLLYLEAF CEANOTHUS	native	
Ceanothus roderickii W. Knight	RHAMNACEAE	PINE HILL CEANOTHUS	native	
Ceanothus sanguineus Pursh	RHAMNACEAE	REDSTEM CEANOTHUS	native	
Ceanothus sonomensis J. T. Howell	RHAMNACEAE	SONOMA CEANOTHUS	native	
Ceanothus spinosus Nutt.	RHAMNACEAE	GREENBARK CEANOTHUS	native	
Ceanothus thyrsiflorus Eschsch.	RHAMNACEAE	BLUE BLOSSOM	native	
Ceanothus tomentosus Parry	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus velutinus Douglas	RHAMNACEAE	CALIFORNIA-LILAC	native	
Ceanothus velutinus Douglas var. velutinus	RHAMNACEAE	TOBACCO BRUSH	native	
Ceanothus velutinus var. laevigatus Torr. & A. Gray	RHAMNACEAE		native	
Ceanothus verrucosus Nutt.	RHAMNACEAE	WART-STEMMED CEANOTHUS	native	
Cedronella canariensis (L.) Willd. ex Webb & Berthel.	LAMIACEAE		naturalized	acceptance uncertain
Celtis reticulata Torr.	CANNABACEAE	NET-LEAF HACKBERRY	native	
Cenchrus ciliaris L.	POACEAE	SANDBUR	naturalized	
Cenchrus echinatus L.	POACEAE	SOUTHERN SANDBUR	naturalized	
Cenchrus incertus M. A. Curtis	POACEAE	COAST SANDBUR	naturalized	
Cenchrus longispinus (Hack.) Fernald	POACEAE	MAT SANDBUR	naturalized	
Centaurea benedicta (L.) L.	ASTERACEAE		naturalized	
Centaurea biebersteinii DC.	ASTERACEAE		naturalized	acceptance uncertain
Centaurea calcitrapa L.	ASTERACEAE	PURPLE STAR-THISTLE	naturalized	
Centaurea cyanus L.	ASTERACEAE	BACHELOR'S BUTTON; CORNFLOWER	naturalized	
Centaurea diffusa Lam.	ASTERACEAE	DIFFUSE KNAPWEED	naturalized	
Centaurea diluta Aiton	ASTERACEAE	KNAPWEED; STAR-THISTLE	naturalized	
Centaurea iberica Spreng.	ASTERACEAE	IBERIAN STAR-THISTLE	naturalized	
Centaurea melitensis L.	ASTERACEAE	TOCALOTE	naturalized	
Centaurea nigra L.	ASTERACEAE	KNAPWEED; STAR-THISTLE	naturalized	
Centaurea solstitialis L.	ASTERACEAE	YELLOW STAR-THISTLE	naturalized	
Centaurea stoebe L.	ASTERACEAE		naturalized	
Centaurea stoebe L. subsp. micranthos (Gugler) Hayek	ASTERACEAE		naturalized	
Centaurea sulphurea Willd.	ASTERACEAE	SICILIAN STAR-THISTLE	naturalized	
Centaurea virgata Lam.	ASTERACEAE		naturalized	
Centaurea virgata Lam. subsp. squarrosa (Boiss.) Gugler.	ASTERACEAE		naturalized	
Centaurium erythraea Rafn	GENTIANACEAE	CENTAURY	naturalized	
Centaurium tenuiflorum (Hoffmanns. & Link) Janch.	GENTIANACEAE		naturalized	
Centranthus ruber (L.) DC.	VALERIANACEAE	RED VALERIAN	naturalized	
Centromadia fitchii (A. Gray) Greene	ASTERACEAE		native	
Centromadia parryi (Greene) Greene	ASTERACEAE		native	
Centromadia parryi (Greene) Greene subsp. australis (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Centromadia parryi (Greene) Greene subsp. congdonii (B. L. Rob. & Greenm.) B. G. Baldwin	ASTERACEAE		native	
Centromadia parryi (Greene) Greene subsp. parryi	ASTERACEAE		native	
Centromadia parryi (Greene) Greene subsp. rudis (Greene) B. G. Baldwin	ASTERACEAE		native	
Centromadia pungens (Hook. & Arn.) Greene	ASTERACEAE		native	
Centromadia pungens (Hook. & Arn.) Greene subsp. laevis (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Centromadia pungens (Hook. & Arn.) Greene subsp. maritima (Greene) B. G. Baldwin	ASTERACEAE		native	
Centromadia pungens (Hook. & Arn.) Greene subsp. pungens	ASTERACEAE		native	
Centromadia pungens (Hook. & Arn.) Greene subsp. septentrionalis (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Centrostegia thurberi A. Gray	POLYGONACEAE	THURBER'S SPINEFLOWER	native	
Cephalanthera austiniae (A. Gray) A. Heller	ORCHIDACEAE	PHANTOM ORCHID	native	
Cephalanthus occidentalis L.	RUBIACEAE	BUTTON BUSH	native	
Cephalanthus occidentalis L. var. californicus Benth.	RUBIACEAE	CALIFORNIA BUTTON WILLOW	native	
Cerastium arvense L.	CARYOPHYLLACEAE	FIELD CHICKWEED	native	
Cerastium arvense L. subsp. strictum Gaudin	CARYOPHYLLACEAE		native	
Cerastium beeringianum Cham. & Schltdl.	CARYOPHYLLACEAE	MOUSE-EAR CHICKWEED	native	
Cerastium dichotomum L.	CARYOPHYLLACEAE	MOUSE-EAR CHICKWEED	naturalized	
Cerastium diffusum Pers.	CARYOPHYLLACEAE		naturalized	
Cerastium fontanum Baumg.	CARYOPHYLLACEAE	MOUSE-EAR CHICKWEED	naturalized	
Cerastium fontanum Baumg. subsp. vulgare (Hartm.) Greuter & Burdet	CARYOPHYLLACEAE	MOUSE-EAR CHICKWEED	naturalized	
Cerastium glomeratum Thuill.	CARYOPHYLLACEAE	MOUSE-EAR CHICKWEED	naturalized	
Cerastium viride A. Heller	CARYOPHYLLACEAE		native	
Ceratonia siliqua L.	FABACEAE		naturalized	
Ceratophyllum demersum L.	CERATOPHYLLACEAE	HORNWORT	native	
Cercis occidentalis Torr. ex A. Gray	FABACEAE	WESTERN REDBUD	native	
Cercocarpus betuloides Nutt.	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus betuloides Nutt. var. betuloides	ROSACEAE	BIRCH-LEAF MOUNTAIN-MAHOGANY	native	
Cercocarpus betuloides Nutt. var. blancheae (C. K. Schneid.) Little	ROSACEAE	ISLAND MOUNTAIN-MAHOGANY	native	
Cercocarpus betuloides Nutt. var. macrourus (Rydb.) Jeps.	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus intricatus S. Watson	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus ledifolius Nutt.	ROSACEAE	CURL-LEAF MOUNTAIN-MAHOGANY	native	
Cercocarpus ledifolius Nutt. var. intermontanus N. H. Holmgren	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus ledifolius Nutt. var. ledifolius	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus minutiflorus Abrams	ROSACEAE	MOUNTAIN-MAHOGANY	native	
Cercocarpus traskiae Eastw.	ROSACEAE	CATALINA ISLAND MOUNTAIN-MAHOGANY	native	
Cestrum nocturnum L.	SOLANACEAE		naturalized	
Chaenactis alpigena Sharsm.	ASTERACEAE	PINCUSHION	native	
Chaenactis artemisiifolia (Harv. & A. Gray) A. Gray	ASTERACEAE	PINCUSHION	native	
Chaenactis carphoclinia A. Gray	ASTERACEAE	PEBBLE PINCUSHION	native	
Chaenactis carphoclinia A. Gray var. carphoclinia	ASTERACEAE	PINCUSHION	native	
Chaenactis carphoclinia A. Gray var. peirsonii (Jeps.) Munz	ASTERACEAE	PEIRSON PINCUSHION	native	
Chaenactis douglasii (Hook.) Hook. & Arn.	ASTERACEAE	PINCUSHION	native	
Chaenactis douglasii (Hook.) Hook. & Arn. var. alpina A. Gray	ASTERACEAE	ALPINE DUSTY MAIDENS	native	
Chaenactis douglasii (Hook.) Hook. & Arn. var. douglasii	ASTERACEAE	DUSTY MAIDENS	native	
Chaenactis fremontii A. Gray	ASTERACEAE	DESERT PINCUSHION	native	
Chaenactis glabriuscula DC.	ASTERACEAE	YELLOW PINCUSHION	native	
Chaenactis glabriuscula DC. var. glabriuscula	ASTERACEAE	PINCUSHION	native	
Chaenactis glabriuscula DC. var. heterocarpha (Torr. & A. Gray) H. M. Hall	ASTERACEAE	PINCUSHION	native	
Chaenactis glabriuscula DC. var. lanosa (DC.) H. M. Hall	ASTERACEAE	PINCUSHION	native	
Chaenactis glabriuscula DC. var. megacephala A. Gray	ASTERACEAE	PINCUSHION	native	
Chaenactis glabriuscula DC. var. orcuttiana (Greene) H. M. Hall	ASTERACEAE	PINCUSHION	native	
Chaenactis macrantha D. C. Eaton	ASTERACEAE	MOJAVE PINCUSHION	native	
Chaenactis nevadensis (Kellogg) A. Gray	ASTERACEAE	PINCUSHION	native	
Chaenactis parishii A. Gray	ASTERACEAE	PARISH'S CHAENACTIS	native	
Chaenactis santolinoides Greene	ASTERACEAE	PINCUSHION	native	
Chaenactis stevioides Hook. & Arn.	ASTERACEAE	DESERT PINCUSHION	native	
Chaenactis suffrutescens A. Gray	ASTERACEAE	SHASTA CHAENACTIS	native	
Chaenactis xantiana A. Gray	ASTERACEAE	PINCUSHION	native	
Chaetadelpha wheeleri A. Gray ex S. Watson	ASTERACEAE		native	
Chaetopappa ericoides (Torr.) G. L. Nesom	ASTERACEAE		native	
Chamaebatia australis (Brandegee) Abrams	ROSACEAE		native	
Chamaebatia foliolosa Benth.	ROSACEAE	MOUNTAIN MISERY	native	
Chamaebatiaria millefolium (Torr.) Maxim.	ROSACEAE	DESERT SWEET; FERN BUSH	native	
Chamaecyparis lawsoniana (A. Murray bis) Parl.	CUPRESSACEAE		native	
Chamaecytisus proliferus (L. f.) Link	FABACEAE		naturalized	
Chamaemelum fuscatum (Brot.) Vasc.	ASTERACEAE		naturalized	
Chamaemelum nobile (L.) All.	ASTERACEAE	CHAMOMILE; RUSSIAN CHAMOMILE	naturalized	
Chamaesaracha coronopus (Dunal) A. Gray	SOLANACEAE		native	
Chamaesaracha nana (A. Gray) A. Gray	SOLANACEAE		native	
Chamaesyce abramsiana (L. C. Wheeler) Koutnik	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce albomarginata (Torr. & A. Gray) Small	EUPHORBIACEAE	RATTLESNAKE WEED	native	
Chamaesyce arizonica (Engelm.) Arthur	EUPHORBIACEAE	ARIZONA SPURGE	native	
Chamaesyce fendleri (Torr. & A. Gray) Small	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce glyptosperma (Engelm.) Small	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce hooveri (L. C. Wheeler) Koutnik	EUPHORBIACEAE	HOOVER'S SPURGE	native	
Chamaesyce maculata (L.) Small	EUPHORBIACEAE	SPOTTED SPURGE	naturalized	
Chamaesyce melanadenia (Torr.) Millsp.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce micromera (Engelm.) Wooton & Standl.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce nutans (Lag.) Small	EUPHORBIACEAE	PROSTRATE SPURGE	naturalized	
Chamaesyce ocellata (Durand & Hilg.) Millsp.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce ocellata (Durand & Hilg.) Millsp. subsp. arenicola (Parish) Thorne	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce ocellata (Durand & Hilg.) Millsp. subsp. ocellata	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce ocellata (Durand & Hilg.) Millsp. subsp. rattanii (S. Watson) Koutnik	EUPHORBIACEAE	STONY CREEK SPURGE	native	
Chamaesyce parishii (Greene) Millsp.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce parryi (Engelm.) Rydb.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce pediculifera (Engelm.) Rose & Standl.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce platysperma (S. Watson) Shinners	EUPHORBIACEAE	FLAT SEEDED SPURGE	native	
Chamaesyce polycarpa (Benth.) Millsp.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce prostrata (Aiton) Small	EUPHORBIACEAE	PROSTRATE SPURGE	naturalized	
Chamaesyce revoluta (Engelm.) Small	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce serpens (Kunth) Small	EUPHORBIACEAE	PROSTRATE SPURGE	naturalized	
Chamaesyce serpyllifolia (Pers.) Small	EUPHORBIACEAE	THYME-LEAFED SPURGE	native	
Chamaesyce serpyllifolia (Pers.) Small subsp. hirtula (S. Watson) Koutnik	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce serpyllifolia (Pers.) Small subsp. serpyllifolia	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce setiloba (Engelm.) Millsp. ex Parish	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamaesyce vallis-mortae Millsp.	EUPHORBIACEAE	PROSTRATE SPURGE	native	
Chamerion angustifolium (L.) Holub	ONAGRACEAE		native	
Chamerion angustifolium (L.) Holub subsp. circumvagum (Mosquin) Hoch	ONAGRACEAE		native	
Chamerion latifolium (L.) Holub	ONAGRACEAE		native	
Chamomilla suaveolens (Pursh) Rydb.	ASTERACEAE	PINEAPPLE WEED; RAYLESS CHAMOMILE	naturalized	
Chasmanthe floribunda (Salisb.) N. E. Br.	IRIDACEAE		naturalized	
Cheilanthes clevelandii D. C. Eaton	PTERIDACEAE		native	
Cheilanthes cooperae D. C. Eaton	PTERIDACEAE		native	
Cheilanthes covillei Maxon	PTERIDACEAE		native	
Cheilanthes feei T. Moore	PTERIDACEAE		native	
Cheilanthes gracillima D. C. Eaton	PTERIDACEAE		native	
Cheilanthes intertexta (Maxon) Maxon	PTERIDACEAE		native	
Cheilanthes newberryi (D. C. Eaton) Domin	PTERIDACEAE		native	
Cheilanthes parryi (D. C. Eaton) Domin	PTERIDACEAE		native	
Cheilanthes viscida Davenp.	PTERIDACEAE	VISCID LACE FERN	native	
Cheilanthes wootonii Maxon	PTERIDACEAE	WOOTON'S LACE FERN	native	
Chenopodium album L.	CHENOPODIACEAE	LAMB'S QUARTERS; PIGWEED	naturalized	
Chenopodium atrovirens Rydb.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium berlandieri Moq.	CHENOPODIACEAE	PITSEED GOOSEFOOT	native	
Chenopodium berlandieri Moq. var. zschackei (Murr) Murr ex Graebn.	CHENOPODIACEAE		native	
Chenopodium californicum (S. Watson) S. Watson	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium capitatum (L.) Asch.	CHENOPODIACEAE		native	
Chenopodium capitatum (L.) Asch. var. capitatum	CHENOPODIACEAE		native	
Chenopodium capitatum (L.) Asch. var. parvicapitatum S. L. Welsh	CHENOPODIACEAE		native	
Chenopodium carnosulum Moq.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium carnosulum Moq. var. patagonicum (Phil.) Wahl	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium chenopodioides (L.) Aellen	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium desiccatum A. Nelson	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium foliosum (Moench) Asch.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium fremontii S. Watson	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium glaucum L.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium glaucum L. var. salinum (Standl.) B. Boivin	CHENOPODIACEAE		naturalized	
Chenopodium hians Standl.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium incanum (S. Watson) A. Heller	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium incanum (S. Watson) A. Heller var. occidentale D. J. Crawford	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium macrospermum Hook. f.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium macrospermum Hook. f. var. halophilum (Phil.) Standl.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium missouriense Aellen	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium murale L.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium nevadense Standl.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium pratericola Rydb.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium rubrum L.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	native	
Chenopodium rubrum L. var. humile (Hook.) S. Watson	CHENOPODIACEAE		native	
Chenopodium rubrum L. var. rubrum	CHENOPODIACEAE		native	
Chenopodium simplex (Torr.) Raf.	CHENOPODIACEAE	LARGE-SEEDED GOOSEFOOT	native	
Chenopodium strictum Roth	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium strictum Roth var. glaucophyllum (Aellen) Wahl	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chenopodium vulvaria L.	CHENOPODIACEAE	GOOSEFOOT; PIGWEED	naturalized	
Chilopsis linearis (Cav.) Sweet	BIGNONIACEAE	DESERT-WILLOW	native	
Chilopsis linearis (Cav.) Sweet subsp. arcuata (Fosb.) Henr.	BIGNONIACEAE	DESERT-WILLOW	native	
Chimaphila menziesii (R. Br. ex D. Don) Spreng.	ERICACEAE	LITTLE PRINCE'S PINE	native	
Chimaphila umbellata (L.) W. P. C. Barton	ERICACEAE	PRINCE'S PINE	native	
Chloracantha spinosa (Benth.) G. L. Nesom	ASTERACEAE		native	
Chloracantha spinosa (Benth.) G. L. Nesom var. spinosa	ASTERACEAE		native	
Chloris gayana Kunth	POACEAE	RHODES GRASS	naturalized	
Chloris verticillata Nutt.	POACEAE		naturalized	
Chloris virgata Sw.	POACEAE		naturalized	
Chlorogalum angustifolium Kellogg	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum grandiflorum Hoover	AGAVACEAE	RED HILLS SOAPROOT	native	
Chlorogalum parviflorum S. Watson	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum pomeridianum (DC.) Kunth	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum pomeridianum (DC.) Kunth var. divaricatum (Lindl.) Hoover	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum pomeridianum (DC.) Kunth var. minus Hoover	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum pomeridianum (DC.) Kunth var. pomeridianum	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum purpureum Brandegee	AGAVACEAE	AMOLE; SOAP PLANT	native	
Chlorogalum purpureum Brandegee var. purpureum	AGAVACEAE	PURPLE AMOLE	native	
Chlorogalum purpureum Brandegee var. reductum Hoover	AGAVACEAE	CAMATTA CANYON AMOLE	native	
Chondrilla juncea L.	ASTERACEAE	SKELETON WEED	naturalized	
Chorisiva nevadensis Rydb.	ASTERACEAE		native	acceptance uncertain
Chorispora tenella (Pall.) DC.	BRASSICACEAE		naturalized	
Chorizanthe angustifolia Nutt.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe biloba Goodman	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe biloba Goodman var. biloba	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe biloba Goodman var. immemora Reveal & Hardham	POLYGONACEAE	HERNANDEZ SPINEFLOWER	native	
Chorizanthe blakleyi Hardham	POLYGONACEAE	BLAKLEY'S SPINEFLOWER	native	
Chorizanthe brevicornu Torr.	POLYGONACEAE	BRITTLE SPINEFLOWER	native	
Chorizanthe brevicornu Torr. var. brevicornu	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe brevicornu Torr. var. spathulata (Rydb.) C. L. Hitchc.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe breweri S. Watson	POLYGONACEAE	BREWER'S SPINEFLOWER	native	
Chorizanthe clevelandii Parry	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe corrugata (Torr.) Torr. & A. Gray	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe cuspidata S. Watson	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe cuspidata S. Watson var. cuspidata	POLYGONACEAE		native	
Chorizanthe cuspidata S. Watson var. villosa (Eastw.) Munz	POLYGONACEAE		native	
Chorizanthe diffusa Benth.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe douglasii Benth.	POLYGONACEAE	DOUGLAS' SPINEFLOWER	native	
Chorizanthe fimbriata Nutt.	POLYGONACEAE	FRINGED SPINEFLOWER	native	
Chorizanthe fimbriata Nutt. var. fimbriata	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe fimbriata Nutt. var. laciniata (Torr.) Jeps.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe howellii Goodman	POLYGONACEAE	HOWELL'S SPINEFLOWER	native	
Chorizanthe leptotheca Goodman	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe membranacea Benth.	POLYGONACEAE	PINK SPINEFLOWER	native	
Chorizanthe obovata Goodman	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe orcuttiana Parry	POLYGONACEAE	ORCUTT'S SPINEFLOWER	native	
Chorizanthe palmeri S. Watson	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe parryi S. Watson	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe parryi S. Watson var. fernandina (S. Watson) Jeps.	POLYGONACEAE	SAN FERNANDO VALLEY SPINEFLOWER	native	
Chorizanthe parryi S. Watson var. parryi	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe polygonoides Torr. & A. Gray	POLYGONACEAE	KNOTWEED SPINEFLOWER	native	
Chorizanthe polygonoides Torr. & A. Gray var. longispina (Goodman) Munz	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe polygonoides Torr. & A. Gray var. polygonoides	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe procumbens Nutt.	POLYGONACEAE	PROSTRATE SPINEFLOWER	native	
Chorizanthe pungens Benth.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe pungens Benth. var. hartwegiana Reveal & Hardham	POLYGONACEAE		native	
Chorizanthe pungens Benth. var. pungens	POLYGONACEAE		native	
Chorizanthe rectispina Goodman	POLYGONACEAE	STRAIGHT-AWNED SPINEFLOWER	native	
Chorizanthe rigida (Torr.) Torr. & A. Gray	POLYGONACEAE	SPINY-HERB	native	
Chorizanthe robusta Parry	POLYGONACEAE	ROBUST SPINEFLOWER	native	
Chorizanthe robusta Parry var. hartwegii (Benth.) Reveal & Rand. Morgan	POLYGONACEAE		native	
Chorizanthe robusta Parry var. robusta	POLYGONACEAE		native	
Chorizanthe spinosa S. Watson	POLYGONACEAE	MOJAVE SPINEFLOWER	native	
Chorizanthe staticoides Benth.	POLYGONACEAE	TURKISH RUGGING	native	
Chorizanthe stellulata Benth.	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe uniaristata Torr. & A. Gray	POLYGONACEAE	ONE-AWNED SPINEFLOWER	native	
Chorizanthe valida S. Watson	POLYGONACEAE	SONOMA SPINEFLOWER	native	
Chorizanthe ventricosa Goodman	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe watsonii Torr. & A. Gray	POLYGONACEAE	WATSON'S SPINEFLOWER	native	
Chorizanthe wheeleri S. Watson	POLYGONACEAE	WHEELER'S SPINEFLOWER	native	
Chorizanthe xanti S. Watson	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe xanti S. Watson var. leucotheca Goodman	POLYGONACEAE	SPINEFLOWER	native	
Chorizanthe xanti S. Watson var. xanti	POLYGONACEAE	SPINEFLOWER	native	
Chrysanthemoides monilifera (L.) Norl.	ASTERACEAE		naturalized	
Chrysolepis chrysophylla (Hook.) Hjelmq.	FAGACEAE	GIANT CHINQUAPIN	native	
Chrysolepis chrysophylla (Hook.) Hjelmq. var. chrysophylla	FAGACEAE	CHINQUAPIN	native	
Chrysolepis chrysophylla (Hook.) Hjelmq. var. minor (Benth.) Munz	FAGACEAE	CHINQUAPIN	native	
Chrysolepis sempervirens (Kellogg) Hjelmq.	FAGACEAE	BUSH CHINQUAPIN	native	
Chrysosplenium glechomifolium Nutt.	SAXIFRAGACEAE	GOLDEN SAXIFRAGE	native	
Chrysothamnus depressus Nutt.	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus greenei (A. Gray) Greene	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus humilis Greene	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus nauseosus (Pall. ex Pursh) Britton subsp. mohavensis (Greene) H. M. Hall & Clem.	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus viscidiflorus (Hook.) Nutt.	ASTERACEAE	YELLOW RABBITBRUSH	native	acceptance uncertain
Chrysothamnus viscidiflorus (Hook.) Nutt. subsp. axillaris (D. D. Keck) L. C. Anderson	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus viscidiflorus (Hook.) Nutt. subsp. lanceolatus (Nutt.) H. M. Hall & Clem.	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus viscidiflorus (Hook.) Nutt. subsp. puberulus (D.C. Eaton) H. M. Hall & Clem.	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Chrysothamnus viscidiflorus (Hook.) Nutt. subsp. viscidiflorus	ASTERACEAE	RABBITBRUSH	native	acceptance uncertain
Cicendia quadrangularis (Lam.) Griseb.	GENTIANACEAE		native	
Cichorium intybus L.	ASTERACEAE	CHICORY	naturalized	
Cicuta douglasii (DC.) J. M. Coult. & Rose	APIACEAE	WATER HEMLOCK	native	
Cicuta maculata L.	APIACEAE	WATER HEMLOCK	native	
Cicuta maculata L. var. angustifolia Hook.	APIACEAE	WATER HEMLOCK	native	
Cicuta maculata L. var. bolanderi (S. Watson) G. A. Mulligan	APIACEAE	WATER HEMLOCK	native	
Cicuta maculata L. var. maculata	APIACEAE		native	acceptance uncertain
Cinna bolanderi Scribn.	POACEAE	BOLANDER'S WOODREED	native	
Cinna latifolia (Goepp.) Griseb.	POACEAE	DROOPING WOODREED	native	
Cinnamomum camphora (L.) J. Presl	LAURACEAE		naturalized	
Circaea alpina L.	ONAGRACEAE	ENCHANTER'S NIGHTSHADE	native	
Circaea alpina L. subsp. pacifica (Asch. & Magnus) P. H. Raven	ONAGRACEAE	ENCHANTER'S NIGHTSHADE	native	
Cirsium andersonii (A. Gray) Petr.	ASTERACEAE	THISTLE	native	
Cirsium andrewsii (A. Gray) Jeps.	ASTERACEAE	FRANCISCAN THISTLE	native	
Cirsium arizonicum (A. Gray) Petr.	ASTERACEAE	ARIZONA THISTLE	native	
Cirsium arizonicum (A. Gray) Petr. var. tenuisectum D. J. Keil	ASTERACEAE		native	
Cirsium arvense (L.) Scop.	ASTERACEAE	CANADA THISTLE	naturalized	
Cirsium brevistylum Cronquist	ASTERACEAE	INDIAN THISTLE	native	
Cirsium canovirens Rydb.	ASTERACEAE	GRAY-GREEN THISTLE	native	
Cirsium ciliolatum (L. F. Hend.) J. T. Howell	ASTERACEAE	ASHLAND THISTLE	native	
Cirsium crassicaule (Greene) Jeps.	ASTERACEAE	THISTLE	native	
Cirsium cymosum (Greene) Jeps.	ASTERACEAE	PEREGRINE THISTLE	native	
Cirsium douglasii DC.	ASTERACEAE	SWAMP THISTLE	native	
Cirsium douglasii DC. var. breweri (A. Gray) D. J. Keil & C. E. Turner	ASTERACEAE	THISTLE	native	
Cirsium douglasii DC. var. douglasii	ASTERACEAE	THISTLE	native	
Cirsium fontinale (Greene) Jeps.	ASTERACEAE	THISTLE	native	
Cirsium fontinale (Greene) Jeps. var. campylon (H. Sharsm.) D. J. Keil & C. E. Turner	ASTERACEAE	HAMILTON THISTLE	native	
Cirsium fontinale (Greene) Jeps. var. fontinale	ASTERACEAE	FOUNTAIN THISTLE	native	
Cirsium fontinale (Greene) Jeps. var. obispoense J. T. Howell	ASTERACEAE	CHORRO CREEK BOG THISTLE	native	
Cirsium hydrophilum (Greene) Jeps.	ASTERACEAE	THISTLE	native	
Cirsium hydrophilum (Greene) Jeps. var. hydrophilum	ASTERACEAE	SUISUN THISTLE	native	
Cirsium hydrophilum (Greene) Jeps. var. vaseyi (A. Gray) J. T. Howell	ASTERACEAE	MOUNT TAMALPAIS THISTLE	native	
Cirsium loncholepis Petr.	ASTERACEAE	LA GRACIOSA THISTLE	native	
Cirsium mohavense (Greene) Petr.	ASTERACEAE	MOJAVE THISTLE	native	
Cirsium neomexicanum A. Gray	ASTERACEAE	DESERT THISTLE	native	
Cirsium nidulum (M. E. Jones) Petr.	ASTERACEAE	THISTLE	native	
Cirsium occidentale (Nutt.) Jeps.	ASTERACEAE	THISTLE	native	
Cirsium occidentale (Nutt.) Jeps. var. californicum (A. Gray) D. J. Keil & C. E. Turner	ASTERACEAE	CALIFORNIA THISTLE	native	
Cirsium occidentale (Nutt.) Jeps. var. candidissimum (Greene) J. F. Macbr.	ASTERACEAE	SNOWY THISTLE	native	
Cirsium occidentale (Nutt.) Jeps. var. compactum Hoover	ASTERACEAE	COMPACT COBWEBBY THISTLE	native	
Cirsium occidentale (Nutt.) Jeps. var. lucianum D. J. Keil	ASTERACEAE		native	
Cirsium occidentale (Nutt.) Jeps. var. occidentale	ASTERACEAE	COBWEBBY THISTLE	native	
Cirsium occidentale (Nutt.) Jeps. var. venustum (Greene) Jeps.	ASTERACEAE	VENUS THISTLE	native	
Cirsium ochrocentrum A. Gray	ASTERACEAE	YELLOWSPINE THISTLE	naturalized	
Cirsium quercetorum (A. Gray) Jeps.	ASTERACEAE	BROWNIE THISTLE	native	
Cirsium remotifolium (Hook.) DC.	ASTERACEAE	THISTLE	native	
Cirsium rhothophilum S. F. Blake	ASTERACEAE	SURF THISTLE	native	
Cirsium scariosum Nutt.	ASTERACEAE	ELK THISTLE	native	
Cirsium scariosum Nutt. var. congdonii (R. J. Moore & Frankton) D. J. Keil	ASTERACEAE		native	
Cirsium scariosum Nutt. var. robustum D. J. Keil	ASTERACEAE		native	
Cirsium undulatum (Nutt.) Spreng.	ASTERACEAE	WAVYLEAF THISTLE	naturalized	
Cirsium vulgare (Savi) Ten.	ASTERACEAE	BULL THISTLE	naturalized	
Cistanthe ambigua (S. Watson) Carolin ex Hershk.	MONTIACEAE		native	
Cistanthe maritima (Nutt.) Hershk.	MONTIACEAE		native	
Cistus incanus L.	CISTACEAE		naturalized	
Cistus ladanifer L.	CISTACEAE	GUM CISTUS	naturalized	
Cistus monspeliensis L.	CISTACEAE	ROCK-ROSE	naturalized	
Cistus salviifolius L.	CISTACEAE	ROCK-ROSE	naturalized	
Citrullus colocynthis (L.) Schrad.	CUCURBITACEAE	WATERMELON	naturalized	
Cladium californicum (S. Watson) O'Neill	CYPERACEAE	SAW-GRASS	native	
Clarkia affinis H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr.	ONAGRACEAE	FAREWELL-TO-SPRING	native	
Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. amoena	ONAGRACEAE	GODETIA	native	
Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. huntiana (Jeps.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia amoena (Lehm.) A. Nelson & J. F. Macbr. subsp. whitneyi (A. Gray) H. Lewis & M. Lewis	ONAGRACEAE	WHITNEY'S FAREWELL-TO-SPRING	native	
Clarkia arcuata (Kellogg) A. Nelson & J. F. Macbr.	ONAGRACEAE		native	
Clarkia australis E. Small	ONAGRACEAE	SMALL'S SOUTHERN CLARKIA	native	
Clarkia biloba (Durand) A. Nelson & J. F. Macbr.	ONAGRACEAE		native	
Clarkia biloba (Durand) A. Nelson & J. F. Macbr. subsp. australis H. Lewis & M. Lewis	ONAGRACEAE	MARIPOSA CLARKIA	native	
Clarkia biloba (Durand) A. Nelson & J. F. Macbr. subsp. biloba	ONAGRACEAE		native	
Clarkia biloba (Durand) A. Nelson & J. F. Macbr. subsp. brandegeeae (Jeps.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia borealis E. Small	ONAGRACEAE		native	
Clarkia borealis E. Small subsp. arida E. Small	ONAGRACEAE	NORTHERN CLARKIA	native	
Clarkia borealis E. Small subsp. borealis	ONAGRACEAE	NORTHERN CLARKIA	native	
Clarkia bottae (Spach) H. Lewis & M. Lewis	ONAGRACEAE	PUNCHBOWL GODETIA	native	
Clarkia breweri (A. Gray) Greene	ONAGRACEAE	BREWER'S CLARKIA; FAIRY FANS	native	
Clarkia concinna (Fisch. & C. A. Mey.) Greene	ONAGRACEAE	RED RIBBONS	native	
Clarkia concinna (Fisch. & C. A. Mey.) Greene subsp. automixa R. N. Bowman	ONAGRACEAE	SANTA CLARA RED RIBBONS	native	
Clarkia concinna (Fisch. & C. A. Mey.) Greene subsp. concinna	ONAGRACEAE		native	
Clarkia concinna (Fisch. & C. A. Mey.) Greene subsp. raichei G. A. Allen, V. S. Ford & Gottlieb	ONAGRACEAE	RAICHE'S RED RIBBONS	native	
Clarkia cylindrica (Jeps.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia cylindrica (Jeps.) H. Lewis & M. Lewis subsp. clavicarpa W. S. Davis	ONAGRACEAE		native	
Clarkia cylindrica (Jeps.) H. Lewis & M. Lewis subsp. cylindrica	ONAGRACEAE		native	
Clarkia davyi (Jeps.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia delicata (Abrams) A. Nelson & J. F. Macbr.	ONAGRACEAE	CAMPO CLARKIA; DELICATE CLARKIA	native	
Clarkia dudleyana (Abrams) J. F. Macbr.	ONAGRACEAE		native	
Clarkia epilobioides (Nutt. ex Torr. & A. Gray) A. Nelson & J. F. Macbr.	ONAGRACEAE		native	
Clarkia exilis H. Lewis & Vasek	ONAGRACEAE	SLENDER CLARKIA	native	
Clarkia franciscana H. Lewis & P. H. Raven	ONAGRACEAE	PRESIDIO CLARKIA	native	
Clarkia gracilis (Piper) A. Nelson & J. F. Macbr.	ONAGRACEAE		native	
Clarkia gracilis (Piper) A. Nelson & J. F. Macbr. subsp. albicaulis (Jeps.) H. Lewis & M. Lewis	ONAGRACEAE	WHITE-STEMMED CLARKIA	native	
Clarkia gracilis (Piper) A. Nelson & J. F. Macbr. subsp. gracilis	ONAGRACEAE		native	
Clarkia gracilis (Piper) A. Nelson & J. F. Macbr. subsp. sonomensis (C. L. Hitchc.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia gracilis (Piper) A. Nelson & J. F. Macbr. subsp. tracyi (Jeps.) Abdel-Hameed & R. Snow	ONAGRACEAE		native	
Clarkia heterandra (Torr.) H. Lewis & P. H. Raven	ONAGRACEAE		native	
Clarkia imbricata H. Lewis & M. Lewis	ONAGRACEAE	VINE HILL CLARKIA	native	
Clarkia jolonensis D. R. Parn.	ONAGRACEAE	JOLON CLARKIA	native	
Clarkia lassenensis (Eastw.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia lewisii P. H. Raven & D. R. Parn.	ONAGRACEAE	LEWIS' CLARKIA	native	
Clarkia lingulata H. Lewis & M. Lewis	ONAGRACEAE	MERCED CLARKIA	native	
Clarkia mildrediae (A. Heller) H. Lewis & M. Lewis	ONAGRACEAE	MILDRED'S CLARKIA	native	
Clarkia mildrediae (A. Heller) H. Lewis & M. Lewis subsp. lutescens Gottlieb & Janeway	ONAGRACEAE		native	
Clarkia mildrediae (A. Heller) H. Lewis & M. Lewis subsp. mildrediae	ONAGRACEAE		native	
Clarkia modesta Jeps.	ONAGRACEAE		native	
Clarkia mosquinii E. Small	ONAGRACEAE		native	
Clarkia prostrata H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr.	ONAGRACEAE		native	
Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. purpurea	ONAGRACEAE		native	
Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. quadrivulnera (Douglas ex Lindl.) H. Lewis & M. Lewis	ONAGRACEAE	FOUR-SPOT	native	
Clarkia purpurea (Curtis) A. Nelson & J. F. Macbr. subsp. viminea (Douglas ex Hook.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia rhomboidea Douglas	ONAGRACEAE		native	
Clarkia rostrata W. S. Davis	ONAGRACEAE	BEAKED CLARKIA	native	
Clarkia rubicunda (Lindl.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia similis H. Lewis & W. R. Ernst	ONAGRACEAE		native	
Clarkia speciosa H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia speciosa H. Lewis & M. Lewis subsp. immaculata H. Lewis & M. Lewis	ONAGRACEAE	PISMO CLARKIA	native	
Clarkia speciosa H. Lewis & M. Lewis subsp. nitens (H. Lewis & M. Lewis) H. Lewis & P. H. Raven	ONAGRACEAE		native	
Clarkia speciosa H. Lewis & M. Lewis subsp. polyantha H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia speciosa H. Lewis & M. Lewis subsp. speciosa	ONAGRACEAE		native	
Clarkia springvillensis Vasek	ONAGRACEAE	SPRINGVILLE CLARKIA	native	
Clarkia stellata Mosquin	ONAGRACEAE		native	
Clarkia tembloriensis Vasek	ONAGRACEAE		native	
Clarkia tembloriensis Vasek subsp. calientensis (Vasek) K. E. Hols.	ONAGRACEAE	VASEK'S CLARKIA	native	
Clarkia tembloriensis Vasek subsp. tembloriensis	ONAGRACEAE		native	
Clarkia unguiculata Lindl.	ONAGRACEAE		native	
Clarkia virgata Greene	ONAGRACEAE	SIERRA CLARKIA	native	
Clarkia williamsonii (Durand & Hilg.) H. Lewis & M. Lewis	ONAGRACEAE		native	
Clarkia xantiana A. Gray	ONAGRACEAE		native	
Clarkia xantiana A. Gray subsp. parviflora (Eastw.) H. Lewis & P. H. Raven	ONAGRACEAE		native	
Clarkia xantiana A. Gray subsp. xantiana	ONAGRACEAE		native	
Claytonia cordifolia S. Watson	MONTIACEAE		native	
Claytonia exigua Torr. & A. Gray	MONTIACEAE		native	
Claytonia exigua Torr. & A. Gray subsp. exigua	MONTIACEAE		native	
Claytonia exigua Torr. & A. Gray subsp. glauca (Torr. & A. Gray) John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia gypsophiloides Fisch. & C. A. Mey.	MONTIACEAE		native	
Claytonia lanceolata Pursh	MONTIACEAE	WESTERN SPRING BEAUTY	native	
Claytonia megarhiza (A. Gray) S. Watson	MONTIACEAE	FELL-FIELDS CLAYTONIA	native	
Claytonia nevadensis S. Watson	MONTIACEAE		native	
Claytonia palustris Swanson & Kelley	MONTIACEAE	MARSH CLAYTONIA	native	
Claytonia parviflora Hook.	MONTIACEAE		native	
Claytonia parviflora Hook. subsp. grandiflora John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia parviflora Hook. subsp. parviflora	MONTIACEAE		native	
Claytonia parviflora Hook. subsp. utahensis (Rydb.) John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia parviflora Hook. subsp. viridis (Davidson) John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia perfoliata Donn ex Willd.	MONTIACEAE	MINER'S LETTUCE	native	
Claytonia perfoliata Donn ex Willd. subsp. intermontana John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia perfoliata Willd. subsp. mexicana (Rydb.) John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia perfoliata Willd. subsp. perfoliata	MONTIACEAE		native	
Claytonia rubra (Howell) Tidestr.	MONTIACEAE		native	
Claytonia rubra (Howell) Tidestr. subsp. depressa (A. Gray) John M. Mill. & K. L. Chambers	MONTIACEAE		native	
Claytonia rubra (Howell) Tidestr. subsp. rubra	MONTIACEAE		native	
Claytonia saxosa Brandegee	MONTIACEAE		native	
Claytonia sibirica L.	MONTIACEAE	CANDY FLOWER	native	
Claytonia umbellata S. Watson	MONTIACEAE		native	
Claytonia washingtoniana (Suksd.) Suksd.	MONTIACEAE		native	
Clematis lasiantha Nutt.	RANUNCULACEAE	PIPESTEMS	native	
Clematis ligusticifolia Nutt.	RANUNCULACEAE	VIRGIN'S BOWER; YERBA DE CHIVA	native	
Clematis pauciflora Nutt.	RANUNCULACEAE	ROPEVINE	native	
Cleome lutea Hook.	BRASSICACEAE	YELLOW BEE PLANT	native	
Cleome platycarpa Torr.	BRASSICACEAE	GOLDEN BEE PLANT	native	
Cleome serrulata Pursh	BRASSICACEAE	ROCKY MOUNTAIN BEE PLANT	native	
Cleome sparsifolia S. Watson	BRASSICACEAE		native	
Cleomella brevipes S. Watson	BRASSICACEAE		native	
Cleomella hillmanii A. Nelson	BRASSICACEAE		native	acceptance uncertain
Cleomella hillmanii A. Nelson var. hillmanii	BRASSICACEAE		native	acceptance uncertain
Cleomella obtusifolia Torr. & Frém.	BRASSICACEAE	MOJAVE STINKWEED	native	
Cleomella parviflora A. Gray	BRASSICACEAE		native	
Cleomella plocasperma S. Watson	BRASSICACEAE		native	
Clintonia andrewsiana Torr.	LILIACEAE		native	
Clintonia uniflora (Menzies ex Schult. & Schult. f.) Kunth	LILIACEAE		native	
Clitoria ternatea L.	FABACEAE		naturalized	acceptance uncertain
Cneoridium dumosum (Nutt. ex Torr. & A. Gray) Baill.	RUTACEAE	BUSHRUE	native	
Cochlearia officinalis L.	BRASSICACEAE	SCURVEYGRASS	native	
Cochlearia officinalis L. var. arctica (DC.) Gelert	BRASSICACEAE	GREENLAND'S COCHLEARIA	native	
Coincya monensis (L.) Greuter & Burdet	BRASSICACEAE		naturalized	
Coix lacryma-jobi L.	POACEAE		naturalized	acceptance uncertain
Coleogyne ramosissima Torr.	ROSACEAE	BLACKBUSH	native	
Collinsia antonina Hardham	PLANTAGINACEAE		native	
Collinsia bartsiifolia Benth.	PLANTAGINACEAE		native	
Collinsia bartsiifolia Benth. var. bartsiifolia	PLANTAGINACEAE		native	
Collinsia bartsiifolia Benth. var. davidsonii (Parish) Newsom	PLANTAGINACEAE		native	
Collinsia callosa Parish	PLANTAGINACEAE		native	
Collinsia childii A. Gray	PLANTAGINACEAE		native	
Collinsia concolor Greene	PLANTAGINACEAE		native	
Collinsia corymbosa Herder	PLANTAGINACEAE	ROUND-HEADED CHINESE HOUSES	native	
Collinsia grandiflora Lindl.	PLANTAGINACEAE		native	
Collinsia greenei A. Gray	PLANTAGINACEAE		native	
Collinsia heterophylla Buist ex Graham	PLANTAGINACEAE	CHINESE HOUSES	native	
Collinsia linearis A. Gray	PLANTAGINACEAE		native	
Collinsia multicolor Lindl. & Paxton	PLANTAGINACEAE	SAN FRANCISCO COLLINSIA	native	
Collinsia parryi A. Gray	PLANTAGINACEAE		native	
Collinsia parviflora Lindl.	PLANTAGINACEAE	BLUE-EYED MARY	native	
Collinsia rattanii A. Gray	PLANTAGINACEAE		native	
Collinsia sparsiflora Fisch. & C. A. Mey.	PLANTAGINACEAE		native	
Collinsia sparsiflora Fisch. & C. A. Mey. var. arvensis (Greene) Jeps.	PLANTAGINACEAE		native	
Collinsia sparsiflora Fisch. & C. A. Mey. var. collina (Jeps.) Newsom	PLANTAGINACEAE		native	
Collinsia sparsiflora Fisch. & C. A. Mey. var. sparsiflora	PLANTAGINACEAE		native	
Collinsia tinctoria Benth.	PLANTAGINACEAE		native	
Collinsia torreyi A. Gray	PLANTAGINACEAE		native	
Collinsia torreyi A. Gray var. brevicarinata Newsom	PLANTAGINACEAE		native	
Collinsia torreyi A. Gray var. latifolia Newsom	PLANTAGINACEAE		native	
Collinsia torreyi A. Gray var. torreyi	PLANTAGINACEAE		native	
Collinsia torreyi A. Gray var. wrightii (S. Watson) I. M. Johnst.	PLANTAGINACEAE		native	
Collomia diversifolia Greene	POLEMONIACEAE	SERPENTINE COLLOMIA	native	
Collomia grandiflora Douglas ex Lindl.	POLEMONIACEAE		native	
Collomia heterophylla Hook.	POLEMONIACEAE		native	
Collomia larsenii (A. Gray) Payson	POLEMONIACEAE	TALUS COLLOMIA	native	
Collomia linearis Nutt.	POLEMONIACEAE		native	
Collomia rawsoniana Greene	POLEMONIACEAE	FLAMING TRUMPET	native	
Collomia tinctoria Kellogg	POLEMONIACEAE		native	
Collomia tracyi H. Mason	POLEMONIACEAE	TRACY'S COLLOMIA	native	
Colubrina californica I. M. Johnst.	RHAMNACEAE	LAS ANIMAS COLUBRINA	native	
Colutea arborescens L.	FABACEAE	BLADDER SENNA	naturalized	
Comandra umbellata (L.) Nutt.	SANTALACEAE	BASTARD TOAD-FLAX	native	
Comandra umbellata (L.) Nutt. subsp. californica (Eastw. ex Rydb.) Piehl	SANTALACEAE	BASTARD TOAD-FLAX	native	
Comarostaphylis diversifolia (Parry) Greene	ERICACEAE		native	
Comarostaphylis diversifolia (Parry) Greene subsp. diversifolia	ERICACEAE	SUMMER HOLLY	native	
Comarostaphylis diversifolia (Parry) Greene subsp. planifolia (Jeps.) G. D. Wallace	ERICACEAE		native	
Comastoma tenellum (Rottb.) Toyok.	GENTIANACEAE		native	
Commelina benghalensis L.	COMMELINACEAE	DAYFLOWER	naturalized	
Condalia globosa I. M. Johnst.	RHAMNACEAE		native	
Condalia globosa I. M. Johnst. var. pubescens I. M. Johnst.	RHAMNACEAE		native	
Conicosia pugioniformis (L.) N. E. Br.	AIZOACEAE		naturalized	
Conioselinum pacificum (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Conium maculatum L.	APIACEAE	POISON HEMLOCK	naturalized	
Conringia orientalis (L.) Dumort.	BRASSICACEAE	HARE'S EAR	naturalized	
Consolida ajacis (L.) Schur	RANUNCULACEAE		naturalized	
Constancea nevinii (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Convolvulus arvensis L.	CONVOLVULACEAE	BINDWEED; ORCHARD MORNING-GLORY	naturalized	
Convolvulus simulans L. M. Perry	CONVOLVULACEAE	BINDWEED; MORNING-GLORY	native	
Conyza bilbaoana J. Rémy	ASTERACEAE		naturalized	
Conyza bonariensis (L.) Cronquist	ASTERACEAE		naturalized	
Conyza canadensis (L.) Cronquist	ASTERACEAE	HORSEWEED	native	
Conyza floribunda Kunth	ASTERACEAE		naturalized	
Coptis laciniata A. Gray	RANUNCULACEAE	GOLDTHREAD	native	
Corallorhiza maculata (Raf.) Raf.	ORCHIDACEAE	SPOTTED CORALROOT	native	
Corallorhiza maculata (Raf.) Raf. var. maculata	ORCHIDACEAE		native	
Corallorhiza maculata (Raf.) Raf. var. occidentalis (Lindl.) Ames	ORCHIDACEAE		native	
Corallorhiza mertensiana Bong.	ORCHIDACEAE	WESTERN CORALROOT	native	
Corallorhiza striata Lindl.	ORCHIDACEAE	STRIPED CORALROOT	native	
Corallorhiza trifida Châtel.	ORCHIDACEAE	NORTHERN CORALROOT	native	
Cordylanthus capitatus Nutt. ex Benth.	SCROPHULARIACEAE	YAKIMA BIRD'S-BEAK	native	
Cordylanthus eremicus (Coville & C. V. Morton) Munz	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus eremicus (Coville & C. V. Morton) Munz subsp. eremicus	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus eremicus (Coville & C. V. Morton) Munz subsp. kernensis T. I. Chuang & Heckard	SCROPHULARIACEAE	INYO BIRD'S-BEAK	native	
Cordylanthus kingii S. Watson	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus kingii S. Watson subsp. helleri (Ferris) T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus maritimus Benth. subsp. canescens (A. Gray) T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus maritimus Benth. subsp. maritimus	SCROPHULARIACEAE	SALT MARSH BIRD'S-BEAK	native	
Cordylanthus maritimus Benth. subsp. palustris (Behr) T. I. Chuang & Heckard	SCROPHULARIACEAE	POINT REYES BIRD'S-BEAK	native	
Cordylanthus maritimus Nutt. ex Benth.	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus mollis A. Gray	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus mollis A. Gray subsp. hispidus (Pennell) T. I. Chuang & Heckard	SCROPHULARIACEAE	HISPID BIRD'S-BEAK	native	
Cordylanthus mollis A. Gray subsp. mollis	SCROPHULARIACEAE	SOFT BIRD'S-BEAK	native	
Cordylanthus nevinii A. Gray	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus nidularius J. T. Howell	SCROPHULARIACEAE	MOUNT DIABLO BIRD'S-BEAK	native	
Cordylanthus orcuttianus A. Gray	SCROPHULARIACEAE	ORCUTT'S BIRD'S-BEAK	native	
Cordylanthus palmatus (Ferris) J. F. Macbr.	SCROPHULARIACEAE	PALMATE BIRD'S-BEAK	native	
Cordylanthus parviflorus (Ferris) Wiggins	SCROPHULARIACEAE	PURPLE BIRD'S-BEAK	native	
Cordylanthus pilosus A. Gray	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus pilosus A. Gray subsp. hansenii (Ferris) T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus pilosus A. Gray subsp. pilosus	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus pilosus A. Gray subsp. trifidus (B. L. Rob. & Greenm.) T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus pringlei A. Gray	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus ramosus Nutt. ex Benth.	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus rigidus (Benth.) Jeps.	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus rigidus (Benth.) Jeps. subsp. brevibracteatus (A. Gray) Munz	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus rigidus (Benth.) Jeps. subsp. littoralis (Ferris) T. I. Chuang & Heckard	SCROPHULARIACEAE	SEASIDE BIRD'S-BEAK	native	
Cordylanthus rigidus (Benth.) Jeps. subsp. rigidus	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus rigidus (Benth.) Jeps. subsp. setigerus T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus tecopensis Munz & J. C. Roos	SCROPHULARIACEAE	TECOPA BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. barbatus T. I. Chuang & Heckard	SCROPHULARIACEAE	FRESNO COUNTY BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. brunneus (Jeps.) Munz	SCROPHULARIACEAE	SERPENTINE BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. capillaris (Pennell) T. I. Chuang & Heckard	SCROPHULARIACEAE	PENNELL'S BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. pallescens (Pennell) T. I. Chuang & Heckard	SCROPHULARIACEAE	PALLID BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. tenuis	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordylanthus tenuis A. Gray subsp. viscidus (Howell) T. I. Chuang & Heckard	SCROPHULARIACEAE	BIRD'S-BEAK	native	
Cordyline australis (G. Forst.) Endl.	LAXMANNIACEAE		naturalized	acceptance uncertain
Coreopsis lanceolata L.	ASTERACEAE	GARDEN COREOPSIS	naturalized	
Coreopsis tinctoria Nutt.	ASTERACEAE	CALLIOPSIS	naturalized	
Coreopsis wrightii (A. Gray) H. M. Parker ex E. B. Sm.	ASTERACEAE	TICKSEED	naturalized	
Corethrogyne filaginifolia (Hook. & Arn.) Nutt.	ASTERACEAE		native	
Coriandrum sativum L.	APIACEAE	CILANTRO; CORIANDER	naturalized	
Corispermum hyssopifolium L.	CHENOPODIACEAE		naturalized	
Cornus canadensis L.	CORNACEAE	BUNCHBERRY	native	
Cornus glabrata Benth.	CORNACEAE	BROWN DOGWOOD	native	
Cornus nuttallii Audubon	CORNACEAE	MOUNTAIN DOGWOOD	native	
Cornus sericea L.	CORNACEAE	AMERICAN DOGWOOD	native	
Cornus sericea L. subsp. occidentalis (Torr. & A. Gray) Fosberg	CORNACEAE	DOGWOOD	native	
Cornus sericea L. subsp. sericea	CORNACEAE	DOGWOOD	native	
Cornus sessilis Torr.	CORNACEAE	DOGWOOD	native	
Coronilla varia L.	FABACEAE		naturalized	
Cortaderia jubata (Lemoine) Stapf	POACEAE		naturalized	
Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn.	POACEAE	PAMPAS GRASS	naturalized	
Corydalis aurea Willd.	PAPAVERACEAE		native	
Corydalis caseana A. Gray	PAPAVERACEAE		native	
Corydalis caseana A. Gray subsp. caseana	PAPAVERACEAE	FITWEED; SIERRA CORYDALIS	native	
Corylus cornuta Marshall	BETULACEAE	FILBERT; HAZELNUT	native	
Corylus cornuta Marshall subsp. californica (A. DC.) E. Murray	BETULACEAE		native	
Coryphantha alversonii (J. M. Coult.) Orcutt	CACTACEAE		native	
Coryphantha chlorantha (Engelm.) Britton & Rose	CACTACEAE		native	
Coryphantha vivipara (Nutt.) Britton & Rose	CACTACEAE		native	
Coryphantha vivipara (Nutt.) Britton & Rose var. rosea (Clokey) L. D. Benson	CACTACEAE		native	
Cosmos bipinnatus Cav.	ASTERACEAE	GARDEN COSMOS	naturalized	
Cosmos sulphureus Cav.	ASTERACEAE		naturalized	
Cotoneaster franchetii Bois	ROSACEAE		naturalized	
Cotoneaster lacteus W. W. Sm.	ROSACEAE		naturalized	
Cotoneaster microphyllus Lindl.	ROSACEAE		naturalized	acceptance uncertain
Cotoneaster pannosus Franch.	ROSACEAE		naturalized	
Cotoneaster simonsii Baker	ROSACEAE		naturalized	acceptance uncertain
Cotula australis (Sieber ex Spreng.) Hook. f.	ASTERACEAE		naturalized	
Cotula coronopifolia L.	ASTERACEAE	BRASS-BUTTONS	naturalized	
Cotyledon orbiculata L.	CRASSULACEAE		naturalized	
Cotyledon orbiculata L. var. oblonga (Haw.) DC.	CRASSULACEAE		naturalized	
Crassula aquatica (L.) Schönl.	CRASSULACEAE		native	
Crassula colligata Toelken	CRASSULACEAE		naturalized	
Crassula colligata Toelken subsp. lamprosperma Toelken	CRASSULACEAE		naturalized	
Crassula connata (Ruiz & Pav.) A. Berger	CRASSULACEAE	PYGMY-WEED	native	
Crassula solieri (Gay) F. Meigen	CRASSULACEAE		native	
Crassula tetragona L.	CRASSULACEAE		naturalized	
Crassula tillaea Lest.-Garl.	CRASSULACEAE		naturalized	
Crataegus castlegarensis J. B. Phipps & O'Kennon	ROSACEAE		native	acceptance uncertain
Crataegus douglasii Lindl.	ROSACEAE	HAWTHORN	native	
Crataegus monogyna Jacq.	ROSACEAE		naturalized	
Crataegus suksdorfii (Sarg.) Kruschke	ROSACEAE	HAWTHORN	native	
Crepis acuminata Nutt.	ASTERACEAE	HAWKSBEARD	native	
Crepis bakeri Greene	ASTERACEAE	HAWKSBEARD	native	
Crepis bursifolia L.	ASTERACEAE	HAWKSBEARD	naturalized	
Crepis capillaris (L.) Wallr.	ASTERACEAE	HAWKSBEARD	naturalized	
Crepis intermedia A. Gray	ASTERACEAE	HAWKSBEARD	native	
Crepis modocensis Greene	ASTERACEAE	HAWKSBEARD	native	
Crepis monticola Coville	ASTERACEAE	HAWKSBEARD	native	
Crepis nana Richardson	ASTERACEAE	HAWKSBEARD	native	
Crepis occidentalis Nutt.	ASTERACEAE	HAWKSBEARD	native	
Crepis pleurocarpa A. Gray	ASTERACEAE	HAWKSBEARD	native	
Crepis runcinata (E. James) Torr. & A. Gray	ASTERACEAE	HAWKSBEARD	native	
Crepis runcinata (E. James) Torr. & A. Gray subsp. andersonii (A. Gray) Babc. & Stebbins	ASTERACEAE	HAWKSBEARD	native	
Crepis runcinata (E. James) Torr. & A. Gray subsp. hallii Babc. & Stebbins	ASTERACEAE	HALL'S MEADOW HAWKSBEARD	native	
Crepis setosa Haller f.	ASTERACEAE	HAWKSBEARD	naturalized	
Crepis tectorum L.	ASTERACEAE		naturalized	
Crepis vesicaria L.	ASTERACEAE	HAWKSBEARD	naturalized	
Crepis vesicaria L. subsp. taraxacifolia (Thuill.) Thell.	ASTERACEAE	HAWKSBEARD	naturalized	
Cressa truxillensis Kunth	CONVOLVULACEAE	ALKALI WEED	native	
Crocidium multicaule Hook.	ASTERACEAE	SPRING GOLD	native	
Crocosmia x crocosmiiflora (Lemoine) N. E. Br.	IRIDACEAE		naturalized	
Crossosoma bigelovii S. Watson	CROSSOSOMATACEAE		native	
Crossosoma californicum Nutt.	CROSSOSOMATACEAE	CATALINA CROSSOSOMA	native	
Croton californicus Muell. Arg.	EUPHORBIACEAE		native	
Croton setigerus Hook.	EUPHORBIACEAE		native	
Croton wigginsii L. C. Wheeler	EUPHORBIACEAE	WIGGINS' CROTON	native	
Crucianella angustifolia L.	RUBIACEAE	CROSS-WORT	naturalized	
Crupina vulgaris Pers. ex Cass.	ASTERACEAE	BEARDED CREEPER	naturalized	
Crypsis alopecuroides (Piller & Mitterp.) Schrad.	POACEAE	PRICKLE GRASS	naturalized	
Crypsis schoenoides (L.) Lam.	POACEAE	SWAMP GRASS	naturalized	
Crypsis vaginiflora (Forssk.) Opiz	POACEAE	PRICKLE GRASS	naturalized	
Cryptantha affinis (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha ambigua (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha angustifolia (Torr.) Greene	BORAGINACEAE		native	
Cryptantha barbigera (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha cinerea (Greene) Cronquist	BORAGINACEAE		native	
Cryptantha cinerea (Greene) Cronquist var. abortiva (Greene) Cronquist	BORAGINACEAE	BOWNUT CRYPTANTHA	native	
Cryptantha circumscissa (Hook. & Arn.) I. M. Johnst.	BORAGINACEAE		native	
Cryptantha clevelandii Greene	BORAGINACEAE		native	
Cryptantha clokeyi I. M. Johnst.	BORAGINACEAE	CLOKEY'S CRYPTANTHA	native	
Cryptantha confertiflora (Greene) Payson	BORAGINACEAE	YELLOW CRYPTANTHA	native	
Cryptantha costata Brandegee	BORAGINACEAE	RIBBED CRYPTANTHA	native	
Cryptantha crinita Greene	BORAGINACEAE	SILKY CRYPTANTHA	native	
Cryptantha crymophila I. M. Johnst.	BORAGINACEAE	SUBALPINE CRYPTANTHA	native	
Cryptantha decipiens (M. E. Jones) A. Heller	BORAGINACEAE		native	
Cryptantha dumetorum (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha echinella Greene	BORAGINACEAE		native	
Cryptantha excavata Brandegee	BORAGINACEAE	DEEP-SCARRED CRYPTANTHA	native	
Cryptantha flaccida (Lehm.) Greene	BORAGINACEAE		native	
Cryptantha flavoculata (A. Nelson) Payson	BORAGINACEAE		native	
Cryptantha ganderi I. M. Johnst.	BORAGINACEAE	GANDER'S CRYPTANTHA	native	
Cryptantha glomeriflora Greene	BORAGINACEAE		native	
Cryptantha gracilis Osterh.	BORAGINACEAE		native	
Cryptantha hispidula Brand	BORAGINACEAE		native	
Cryptantha holoptera (A. Gray) J. F. Macbr.	BORAGINACEAE	WINGED CRYPTANTHA	native	
Cryptantha hooveri I. M. Johnst.	BORAGINACEAE	HOOVER'S CRYPTANTHA	native	
Cryptantha humilis (A. Gray) Payson	BORAGINACEAE		native	
Cryptantha incana Greene	BORAGINACEAE		native	
Cryptantha intermedia (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha leiocarpa (Fisch. & C. A. Mey.) Greene	BORAGINACEAE		native	
Cryptantha mariposae I. M. Johnst.	BORAGINACEAE	MARIPOSA CRYPTANTHA	native	
Cryptantha maritima (Greene) Greene	BORAGINACEAE		native	
Cryptantha micrantha (Torr.) I. M. Johnst.	BORAGINACEAE		native	
Cryptantha micromeres (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha microstachys (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha milobakeri I. M. Johnst.	BORAGINACEAE		native	
Cryptantha mohavensis (Greene) Greene	BORAGINACEAE		native	
Cryptantha muricata (Hook. & Arn.) A. Nelson & J. F. Macbr.	BORAGINACEAE		native	
Cryptantha nemaclada Greene	BORAGINACEAE		native	
Cryptantha nevadensis A. Nelson & P. B. Kenn.	BORAGINACEAE		native	
Cryptantha nubigena (Greene) Payson	BORAGINACEAE		native	
Cryptantha oxygona (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha pterocarya (Torr.) Greene	BORAGINACEAE		native	
Cryptantha racemosa (S. Watson) Greene	BORAGINACEAE		native	
Cryptantha recurvata Coville	BORAGINACEAE		native	
Cryptantha roosiorum Munz	BORAGINACEAE	BRISTLECONE CRYPTANTHA	native	
Cryptantha simulans Greene	BORAGINACEAE		native	
Cryptantha sobolifera Payson	BORAGINACEAE		native	
Cryptantha torreyana (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha traskiae I. M. Johnst.	BORAGINACEAE	TRASK'S CRYPTANTHA	native	
Cryptantha tumulosa (Payson) Payson	BORAGINACEAE	NEW YORK MOUNTAINS CRYPTANTHA	native	
Cryptantha utahensis (A. Gray) Greene	BORAGINACEAE		native	
Cryptantha virginensis (M. E. Jones) Payson	BORAGINACEAE		native	
Cryptantha watsonii (A. Gray) Greene	BORAGINACEAE		native	
Cryptogramma acrostichoides R. Br.	PTERIDACEAE	AMERICAN PARSLEY FERN	native	
Cryptogramma cascadensis E. R. Alverson	PTERIDACEAE	PARSLEY FERN; ROCK-BRAKE	native	
Cucumis melo L.	CUCURBITACEAE	CUCUMBER; MELON	naturalized	
Cucumis melo L. var. dudaim (L.) Naudin	CUCURBITACEAE	DUDAIM MELON	naturalized	
Cucumis myriocarpus Naudin	CUCURBITACEAE	PADDY MELON	naturalized	
Cucurbita digitata A. Gray	CUCURBITACEAE	FINGER-LEAVED GOURD	native	
Cucurbita foetidissima Kunth	CUCURBITACEAE	CALABAZILLA	native	
Cucurbita palmata S. Watson	CUCURBITACEAE	COYOTE MELON	native	
Cucurbita pepo L.	CUCURBITACEAE		naturalized	acceptance uncertain
Cucurbita pepo L. var. pepo	CUCURBITACEAE		naturalized	acceptance uncertain
Cuniculotinus gramineus (H. M. Hall) Urbatsch, R. P. Roberts & Neubig	ASTERACEAE		native	
Cupaniopsis anacardioides (A. Rich) Radlk.	SAPINDACEAE		naturalized	acceptance uncertain
Cuscuta approximata Bab.	CONVOLVULACEAE	DODDER	naturalized	
Cuscuta brachycalyx (Yunck.) Yunck.	CONVOLVULACEAE		native	
Cuscuta californica Hook. & Arn.	CONVOLVULACEAE	DODDER	native	
Cuscuta californica Hook. & Arn. var. apiculata Engelm.	CONVOLVULACEAE	DODDER	native	
Cuscuta californica Hook. & Arn. var. californica	CONVOLVULACEAE	DODDER	native	
Cuscuta californica Hook. & Arn. var. papillosa Yunck.	CONVOLVULACEAE	DODDER	native	
Cuscuta campestris Yunck.	CONVOLVULACEAE		native	
Cuscuta cephalanthi Engelm.	CONVOLVULACEAE	DODDER	native	
Cuscuta denticulata Engelm.	CONVOLVULACEAE	DODDER	native	
Cuscuta howelliana P. Rubtzoff	CONVOLVULACEAE	BOGGS LAKE DODDER	native	
Cuscuta indecora Choisy	CONVOLVULACEAE	DODDER	native	
Cuscuta indecora Choisy var. indecora	CONVOLVULACEAE	DODDER	native	
Cuscuta jepsonii Yunck.	CONVOLVULACEAE		native	
Cuscuta nevadensis I. M. Johnst.	CONVOLVULACEAE		native	
Cuscuta occidentalis Millsp.	CONVOLVULACEAE		native	
Cuscuta pacifica Costea & M. Wright	CONVOLVULACEAE		native	
Cuscuta pacifica Costea & M. Wright var. pacifica	CONVOLVULACEAE		native	
Cuscuta pacifica Costea & M. Wright var. papillata (Yunck.) Costea & M. Wright	CONVOLVULACEAE		native	
Cuscuta salina Engelm.	CONVOLVULACEAE	DODDER	native	
Cuscuta subinclusa Durand & Hilg.	CONVOLVULACEAE	DODDER	native	
Cuscuta suksdorfii Yunck.	CONVOLVULACEAE		native	
Cusickiella douglasii (A. Gray) Rollins	BRASSICACEAE		native	
Cusickiella quadricostata (Rollins) Rollins	BRASSICACEAE		native	
Cycladenia humilis Benth.	APOCYNACEAE		native	
Cycladenia humilis Benth. var. humilis	APOCYNACEAE		native	
Cycladenia humilis Benth. var. jonesii (Eastw.) S. L. Welsh & N. D. Atwood	APOCYNACEAE		native	
Cycladenia humilis Benth. var. venusta (Eastw.) Munz	APOCYNACEAE		native	
Cycloloma atriplicifolium (Spreng.) J. M. Coult.	CHENOPODIACEAE	WINGED PIGWEED	naturalized	
Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson	APIACEAE		naturalized	
Cydonia oblonga Mill.	ROSACEAE		naturalized	acceptance uncertain
Cylindropuntia acanthocarpa (Engelm. & J. M. Bigelow) F. M. Knuth	CACTACEAE		native	
Cylindropuntia acanthocarpa (Engelm. & J. M. Bigelow) F. M. Knuth var. coloradensis (L. D. Benson) Pinkava	CACTACEAE		native	
Cylindropuntia acanthocarpa (Engelm. & J. M. Bigelow) F. M. Knuth var. major (Engelm.) Pinkava	CACTACEAE		native	acceptance uncertain
Cylindropuntia bigelovii (Engelm.) F. M. Knuth	CACTACEAE		native	
Cylindropuntia californica (Torr. & A. Gray) F. M. Knuth	CACTACEAE		native	
Cylindropuntia californica (Torr. & A. Gray) F. M. Knuth var. californica	CACTACEAE		native	acceptance uncertain
Cylindropuntia californica (Torr. & A. Gray) F. M. Knuth var. parkeri (J.M. Coult.) Pinkava	CACTACEAE		native	
Cylindropuntia echinocarpa (Engelm. & J. M. Bigelow) F. M. Knuth	CACTACEAE		native	
Cylindropuntia ganderi (C. B. Wolf) Rebman & Pinkava	CACTACEAE		native	
Cylindropuntia prolifera (Engelm.) F. M. Knuth	CACTACEAE		native	
Cylindropuntia ramosissima (Engelm.) F. M. Knuth	CACTACEAE		native	
Cylindropuntia wolfii (L. D. Benson) M. A. Baker	CACTACEAE		native	
Cymbalaria muralis P. Gaertn., B. Mey., & Scherb.	PLANTAGINACEAE	KENILWORTH IVY	naturalized	
Cymopterus aboriginum M. E. Jones	APIACEAE		native	
Cymopterus cinerarius A. Gray	APIACEAE		native	
Cymopterus deserticola Brandegee	APIACEAE	DESERT CYMOPTERUS	native	
Cymopterus gilmanii C. V. Morton	APIACEAE	GILMAN'S CYMOPTERUS	native	
Cymopterus globosus (S. Watson) S. Watson	APIACEAE		native	
Cymopterus multinervatus (J. M. Coult. & Rose) Tidestr.	APIACEAE		native	
Cymopterus panamintensis J. M. Coult. & Rose	APIACEAE		native	
Cymopterus panamintensis J. M. Coult. & Rose var. acutifolius (J. M. Coult. & Rose) Munz	APIACEAE		native	
Cymopterus panamintensis J. M. Coult. & Rose var. panamintensis	APIACEAE		native	
Cymopterus purpurascens (A. Gray) M. E. Jones	APIACEAE		native	
Cymopterus ripleyi Barneby	APIACEAE	RIPLEY'S CYMOPTERUS	native	
Cymopterus terebinthinus (Hook.) Torr. & A. Gray	APIACEAE		native	
Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. californicus (J. M. Coult. & Rose) Jeps.	APIACEAE		native	
Cymopterus terebinthinus (Hook.) Torr. & A. Gray var. petraeus (M. E. Jones) Goodrich	APIACEAE		native	
Cynara cardunculus L.	ASTERACEAE	ARTICHOKE THISTLE; CARDOON	naturalized	
Cynara scolymus L.	ASTERACEAE	ARTICHOKE	naturalized	
Cynodon dactylon (L.) Pers.	POACEAE	BERMUDA GRASS	naturalized	
Cynodon plectostachyus (K. Schum.) Pilg.	POACEAE	STAR GRASS	naturalized	
Cynodon transvaalensis Burtt Davy	POACEAE	AFRICAN BERMUDA GRASS	naturalized	
Cynoglossum grande Lehm.	BORAGINACEAE	HOUND'S TONGUE	native	
Cynoglossum occidentale A. Gray	BORAGINACEAE	HOUND'S TONGUE	native	
Cynoglossum officinale L.	BORAGINACEAE	HOUND'S TONGUE	naturalized	
Cynosurus cristatus L.	POACEAE	CRESTED DOGTAIL	naturalized	
Cynosurus echinatus L.	POACEAE	HEDGEHOG DOGTAIL	naturalized	
Cyperus acuminatus Torr. & Hook.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus bipartitus Torr.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus difformis L.	CYPERACEAE	GALINGALE; NUTSEDGE	naturalized	
Cyperus eragrostis Lam.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus erythrorhizos Muhl.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus esculentus L.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus flavescens L.	CYPERACEAE		naturalized	
Cyperus flavicomus Michx.	CYPERACEAE		naturalized	
Cyperus fuscus L.	CYPERACEAE	GALINGALE; NUTSEDGE	naturalized	
Cyperus involucratus Rottb.	CYPERACEAE	GALINGALE; NUTSEDGE	naturalized	
Cyperus iria L.	CYPERACEAE		naturalized	
Cyperus laevigatus L.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus niger Ruiz & Pav.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus odoratus L.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus owanii Boeck.	CYPERACEAE		naturalized	
Cyperus papyrus L.	CYPERACEAE		naturalized	acceptance uncertain
Cyperus parishii Britton	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus prolifer Lam.	CYPERACEAE		naturalized	acceptance uncertain
Cyperus rotundus L.	CYPERACEAE	PURPLE NUTSEDGE	naturalized	
Cyperus squarrosus L.	CYPERACEAE	GALINGALE; NUTSEDGE	native	
Cyperus strigosus L.	CYPERACEAE	FALSE NUTSEDGE	native	
Cypripedium californicum A. Gray	ORCHIDACEAE	CALIFORNIA LADY'S-SLIPPER	native	
Cypripedium fasciculatum Kellogg	ORCHIDACEAE	CLUSTERED LADY'S-SLIPPER	native	
Cypripedium montanum Douglas ex Lindl.	ORCHIDACEAE	MOUNTAIN LADY'S SLIPPER	native	
Cypripedium parviflorum Salisb.	ORCHIDACEAE		native	
Cypripedium parviflorum Salisb. var. makasin (Farw.) Sheviak	ORCHIDACEAE		native	
Cypselea humifusa Turpin	AIZOACEAE		naturalized	
Cyrtomium falcatum (L. f.) C. Presl	DRYOPTERIDACEAE	HOLLY FERN	naturalized	
Cystopteris fragilis (L.) Bernh.	WOODSIACEAE	FRAGILE FERN	native	
Cytisus multiflorus (L'Hér.) Sweet	FABACEAE	PORTUGUESE BROOM; SPANISH BROOM	naturalized	
Cytisus proliferus L. f.	FABACEAE		naturalized	
Cytisus scoparius (L.) Link	FABACEAE	SCOTCH BROOM	naturalized	
Cytisus striatus (Hill) Rothm.	FABACEAE		naturalized	
Dactylis glomerata L.	POACEAE	ORCHARD GRASS	naturalized	
Dactyloctenium aegyptium (L.) Willd.	POACEAE	CROWFOOT GRASS	naturalized	
Dalea mollis Benth.	FABACEAE		native	
Dalea mollissima (Rydb.) Munz	FABACEAE		native	
Dalea ornata (Hook.) Eaton & J. Wright	FABACEAE	ORNATE DALEA	native	
Dalea searlsiae (A. Gray) Barneby	FABACEAE		native	
Damasonium californicum Torr. ex Benth.	ALISMATACEAE		native	
Danthonia californica Bol.	POACEAE	CALIFORNIA OATGRASS	native	
Danthonia californica Bol. var. americana (Scribn.) Hitchc.	POACEAE	OATGRASS	native	
Danthonia californica Bol. var. californica	POACEAE	OATGRASS	native	
Danthonia intermedia Vasey	POACEAE	INTERMEDIATE OATGRASS	native	
Danthonia unispicata (Thurb.) Munro ex Vasey	POACEAE	ONE-SPIKE OATGRASS	native	
Darlingtonia californica Torr.	SARRACENIACEAE	CALIFORNIA PITCHER PLANT; COBRA LILY	native	
Darmera peltata (Torr. ex Benth.) Voss	SAXIFRAGACEAE	INDIAN RHUBARB; UMBRELLA PLANT	native	
Datisca glomerata (C. Presl) Baill.	DATISCACEAE	DURANGO ROOT	native	
Datura discolor Bernh.	SOLANACEAE	JIMSON WEED; THORN-APPLE	native	
Datura ferox L.	SOLANACEAE	JIMSON WEED; THORN-APPLE	naturalized	
Datura stramonium L.	SOLANACEAE	JIMSON WEED	naturalized	
Datura wrightii Regel	SOLANACEAE	JIMSON WEED; THORN-APPLE	native	
Daucus carota L.	APIACEAE	CARROT; QUEEN ANNE'S LACE	naturalized	
Daucus pusillus Michx.	APIACEAE		native	
Dedeckera eurekensis Reveal & J. T. Howell	POLYGONACEAE	JULY GOLD	native	
Deinandra arida (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra bacigalupii B. G. Baldwin	ASTERACEAE		native	
Deinandra clementina (Brandegee) B. G. Baldwin	ASTERACEAE		native	
Deinandra conjugens (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra corymbosa (DC.) B. G. Baldwin	ASTERACEAE		native	
Deinandra corymbosa (DC.) B. G. Baldwin subsp. corymbosa	ASTERACEAE		native	
Deinandra corymbosa (DC.) B. G. Baldwin subsp. macrocephala (Nutt.) B. G. Baldwin	ASTERACEAE		native	
Deinandra fasciculata (DC.) Greene	ASTERACEAE		native	
Deinandra floribunda (A. Gray) Davidson & Moxley	ASTERACEAE		native	
Deinandra halliana (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra increscens (H. M. Hall ex D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra increscens (H. M. Hall ex D. D. Keck) B. G. Baldwin subsp. increscens	ASTERACEAE		native	
Deinandra increscens (H. M. Hall ex D. D. Keck) B. G. Baldwin subsp. villosa (Tanowitz) B. G. Baldwin	ASTERACEAE		native	
Deinandra kelloggii (Greene) Greene	ASTERACEAE		native	
Deinandra lobbii (Greene) Greene	ASTERACEAE		native	
Deinandra minthornii (Jeps.) B. G. Baldwin	ASTERACEAE		native	
Deinandra mohavensis (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra pallida (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Deinandra paniculata (A. Gray) Davidson & Moxley	ASTERACEAE		native	
Deinandra pentactis (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Delairea odorata Lem.	ASTERACEAE		naturalized	
Delosperma litorale (Kensit) L. Bolus	AIZOACEAE		naturalized	
Delphinium andersonii A. Gray	RANUNCULACEAE	LARKSPUR	native	
Delphinium antoninum Eastw.	RANUNCULACEAE	ANTHONY PEAK LARKSPUR	native	
Delphinium bakeri Ewan	RANUNCULACEAE	BAKER'S LARKSPUR	native	
Delphinium californicum Torr. & A. Gray	RANUNCULACEAE	LARKSPUR	native	
Delphinium californicum Torr. & A. Gray subsp. californicum	RANUNCULACEAE	CALIFORNIA LARKSPUR; COAST LARKSPUR	native	
Delphinium californicum Torr. & A. Gray subsp. interius (Eastw.) Ewan	RANUNCULACEAE	HOSPITAL CANYON LARKSPUR	native	
Delphinium cardinale Hook.	RANUNCULACEAE	CARDINAL LARKSPUR; SCARLET LARKSPUR	native	
Delphinium decorum Fisch. & C. A. Mey.	RANUNCULACEAE	YELLOWTINGE LARKSPUR	native	
Delphinium decorum Fisch. & C. A. Mey. subsp. decorum	RANUNCULACEAE	COAST LARKSPUR	native	
Delphinium decorum Fisch. & C. A. Mey. subsp. tracyi Ewan	RANUNCULACEAE	TRACY'S LARKSPUR	native	
Delphinium depauperatum Nutt.	RANUNCULACEAE	LARKSPUR	native	
Delphinium glaucum S. Watson	RANUNCULACEAE	MOUNTAIN LARKSPUR	native	
Delphinium gracilentum Greene	RANUNCULACEAE	LARKSPUR	native	
Delphinium gypsophilum Ewan	RANUNCULACEAE	LARKSPUR	native	
Delphinium gypsophilum Ewan subsp. gypsophilum	RANUNCULACEAE	GYPSUM-LOVING LARKSPUR	native	
Delphinium gypsophilum Ewan subsp. parviflorum H. Lewis & Epling	RANUNCULACEAE	SMALL-FLOWERED GYPSUM-LOVING LARKSPUR	native	
Delphinium hansenii (Greene) Greene	RANUNCULACEAE	HANSEN'S LARKSPUR	native	
Delphinium hansenii (Greene) Greene subsp. ewanianum M. J. Warnock	RANUNCULACEAE	EWAN'S LARKSPUR	native	
Delphinium hansenii (Greene) Greene subsp. hansenii	RANUNCULACEAE	LARKSPUR	native	
Delphinium hansenii (Greene) Greene subsp. kernense (Davidson) Ewan	RANUNCULACEAE	LARKSPUR	native	
Delphinium hesperium A. Gray	RANUNCULACEAE	COAST LARKSPUR; WESTERN LARKSPUR	native	
Delphinium hesperium A. Gray subsp. cuyamacae (Abrams) H. Lewis & Epling	RANUNCULACEAE	CUYAMACA LARKSPUR	native	
Delphinium hesperium A. Gray subsp. hesperium	RANUNCULACEAE	LARKSPUR	native	
Delphinium hesperium A. Gray subsp. pallescens (Ewan) H. Lewis & Epling	RANUNCULACEAE	LARKSPUR	native	
Delphinium hutchinsoniae Ewan	RANUNCULACEAE	HUTCHINSON'S LARKSPUR	native	
Delphinium inopinum (Jeps.) H. Lewis & Epling	RANUNCULACEAE	UNEXPECTED LARKSPUR	native	
Delphinium luteum A. Heller	RANUNCULACEAE	GOLDEN LARKSPUR; YELLOW LARKSPUR	native	
Delphinium nudicaule Torr. & A. Gray	RANUNCULACEAE	ORANGE LARKSPUR; RED LARKSPUR	native	
Delphinium nuttallianum Pritz.	RANUNCULACEAE	DWARF LARKSPUR; LARKSPUR; MEADOW LARKSPUR; SLIM; SONNE'S LARKSPUR	native	
Delphinium parishii A. Gray	RANUNCULACEAE	LARKSPUR	native	
Delphinium parishii A. Gray subsp. pallidum (Munz) M. J. Warnock	RANUNCULACEAE	PALE-FLOWERED LARKSPUR	native	
Delphinium parishii A. Gray subsp. parishii	RANUNCULACEAE	DESERT LARKSPUR; PARISH'S LARKSPUR	native	
Delphinium parishii A. Gray subsp. subglobosum (Wiggins) H. Lewis & Epling	RANUNCULACEAE	LARKSPUR	native	
Delphinium parryi A. Gray	RANUNCULACEAE	LARKSPUR	native	
Delphinium parryi A. Gray subsp. blochmaniae (Greene) H. Lewis & Epling	RANUNCULACEAE	BLOCHMAN'S LARKSPUR; DUNE LARKSPUR	native	
Delphinium parryi A. Gray subsp. eastwoodiae Ewan	RANUNCULACEAE	EASTWOOD'S LARKSPUR	native	
Delphinium parryi A. Gray subsp. maritimum (Davidson) M. J. Warnock	RANUNCULACEAE	LARKSPUR	native	
Delphinium parryi A. Gray subsp. parryi	RANUNCULACEAE	PARRY'S LARKSPUR	native	
Delphinium parryi A. Gray subsp. purpureum (H. Lewis & Epling) M. J. Warnock	RANUNCULACEAE	MOUNT PINOS LARKSPUR	native	
Delphinium patens Benth.	RANUNCULACEAE	SPREADING LARKSPUR	native	
Delphinium patens Benth. subsp. hepaticoideum Ewan	RANUNCULACEAE	LARKSPUR	native	
Delphinium patens Benth. subsp. montanum (Munz) Ewan	RANUNCULACEAE	LARKSPUR	native	
Delphinium patens Benth. subsp. patens	RANUNCULACEAE	LARKSPUR	native	
Delphinium polycladon Eastw.	RANUNCULACEAE	HIGH MOUNTAIN LARKSPUR	native	
Delphinium purpusii Brandegee	RANUNCULACEAE	KERN COUNTY LARKSPUR; LARKSPUR; PURPUS' LARKSPUR; ROSE-FLOWERED	native	
Delphinium recurvatum Greene	RANUNCULACEAE	RECURVED LARKSPUR; VALLEY LARKSPUR	native	
Delphinium scaposum Greene	RANUNCULACEAE		native	
Delphinium stachydeum (A. Gray) Tidestr.	RANUNCULACEAE	ROCKY MOUNTAIN LARKSPUR; SPIKED LARKSPUR	native	
Delphinium trolliifolium A. Gray	RANUNCULACEAE	COW POISON	native	
Delphinium uliginosum Curran	RANUNCULACEAE	BOG LARKSPUR; SWAMP LARKSPUR	native	
Delphinium umbraculorum H. Lewis & Epling	RANUNCULACEAE	UMBRELLA LARKSPUR	native	
Delphinium variegatum Torr. & A. Gray	RANUNCULACEAE	ROYAL LARKSPUR	native	
Delphinium variegatum Torr. & A. Gray subsp. kinkiense (Munz) M. J. Warnock	RANUNCULACEAE	SAN CLEMENTE ISLAND LARKSPUR	native	
Delphinium variegatum Torr. & A. Gray subsp. thornei Munz	RANUNCULACEAE	THORNE'S ROYAL LARKSPUR	native	
Delphinium variegatum Torr. & A. Gray subsp. variegatum	RANUNCULACEAE	LARKSPUR	native	
Dendromecon harfordii Kellogg	PAPAVERACEAE	CHANNEL ISLAND TREE POPPY	native	
Dendromecon rigida Benth.	PAPAVERACEAE	BUSH POPPY	native	
Deschampsia atropurpurea (Wahlenb.) Scheele	POACEAE	MOUNTAIN HAIRGRASS	native	
Deschampsia cespitosa (L.) P. Beauv.	POACEAE	TUFTED HAIRGRASS	native	
Deschampsia cespitosa (L.) P. Beauv. subsp. cespitosa	POACEAE	HAIRGRASS	native	
Deschampsia cespitosa (L.) P. Beauv. subsp. holciformis (J. Presl) W. E. Lawr.	POACEAE	HAIRGRASS	native	
Deschampsia danthonioides (Trin.) Munro	POACEAE	ANNUAL HAIRGRASS	native	
Deschampsia elongata (Hook.) Munro	POACEAE	SLENDER HAIRGRASS	native	
Descurainia californica (A. Gray) O. E. Schulz	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia incana (Fisch. & C. A. Mey.) Dorn	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia incisa (Engelm.) Britton	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia incisa (Engelm.) Britton subsp. filipes (A. Gray) Rollins	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia incisa (Engelm.) Britton subsp. incisa	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia obtusa (Greene) O. E. Schulz	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia obtusa (Greene) O. E. Schulz subsp. adenophora (Wooton & Standl.) Detling	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia paradisa (A. Nelson & P. B. Kenn.) O. E. Schulz	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia paradisa (A. Nelson & P. B. Kenn.) O. E. Schulz subsp. paradisa	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia pinnata (Walter) Britton	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia pinnata (Walter) Britton subsp. glabra (Wooton & Standl.) Detling	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia pinnata (Walter) Britton subsp. halictorum (Cockerell) Detling	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia pinnata (Walter) Britton subsp. intermedia (Rydb.) Detling	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia pinnata (Walter) Britton subsp. menziesii (DC.) Detling	BRASSICACEAE	TANSY MUSTARD	native	
Descurainia sophia (L.) Webb ex Prantl	BRASSICACEAE	TANSY MUSTARD	naturalized	
Desmazeria rigida (L.) Tutin	POACEAE		naturalized	
Dianthus armeria L.	CARYOPHYLLACEAE	CARNATION; PINK	naturalized	
Dianthus armeria L. subsp. armeria	CARYOPHYLLACEAE	DEPTFORD PINK; GRASS PINK	naturalized	
Dianthus barbatus L.	CARYOPHYLLACEAE	CARNATION; PINK	naturalized	
Dianthus barbatus L. subsp. barbatus	CARYOPHYLLACEAE	SWEET WILLIAM	naturalized	
Dianthus deltoides L.	CARYOPHYLLACEAE	CARNATION; PINK	naturalized	
Dianthus deltoides L. subsp. deltoides	CARYOPHYLLACEAE	MAIDEN PINK; MEADOW PINK	naturalized	
Dicentra formosa (Haw.) Walp.	PAPAVERACEAE	BLEEDING HEART	native	
Dicentra nevadensis Eastw.	PAPAVERACEAE	TULARE COUNTY BLEEDING HEART	native	
Dicentra pauciflora S. Watson	PAPAVERACEAE		native	
Dicentra uniflora Kellogg	PAPAVERACEAE	STEER'S HEAD	native	
Dichelostemma capitatum (Benth.) A. W. Wood	THEMIDACEAE	BLUE DICKS	native	
Dichelostemma capitatum (Benth.) A. W. Wood subsp. capitatum	THEMIDACEAE		native	
Dichelostemma capitatum (Benth.) A. W. Wood subsp. pauciflorum (Torr.) Keator	THEMIDACEAE		native	
Dichelostemma congestum (Sm.) Kunth	THEMIDACEAE	OOKOW	native	
Dichelostemma ida-maia (A. W. Wood) Greene	THEMIDACEAE	FIRECRACKER FLOWER	native	
Dichelostemma multiflorum (Benth.) A. Heller	THEMIDACEAE	WILD HYACINTH	native	
Dichelostemma volubile (Kellogg) A. Heller	THEMIDACEAE	SNAKE LILY; TWINING BRODIAEA	native	
Dichondra donelliana Tharp & M. C. Johnst.	CONVOLVULACEAE		native	
Dichondra micrantha Urb.	CONVOLVULACEAE		naturalized	
Dichondra occidentalis House	CONVOLVULACEAE	WESTERN DICHONDRA	native	
Dicoria canescens A. Gray	ASTERACEAE		native	
Dieteria asteroides Torr.	ASTERACEAE		native	
Dieteria asteroides Torr. var. asteroides	ASTERACEAE		native	
Dieteria asteroides Torr. var. lagunensis (D. D. Keck) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt.	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt. var. canescens	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt. var. incana (Lindl.) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt. var. leucanthemifolia (Greene) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt. var. shastensis (A. Gray) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Dieteria canescens (Pursh) Nutt. var. ziegleri (Munz) D. R. Morgan & R. L. Hartm.	ASTERACEAE		native	
Digitalis purpurea L.	PLANTAGINACEAE	FOXGLOVE	naturalized	
Digitaria californica (Benth.) Henrard	POACEAE		native	acceptance uncertain
Digitaria ischaemum (Schreb.) Muhl.	POACEAE		naturalized	
Digitaria sanguinalis (L.) Scop.	POACEAE		naturalized	
Dimeresia howellii A. Gray	ASTERACEAE	DOUBLET	native	
Dimorphotheca sinuata DC.	ASTERACEAE	AFRICAN DAISY; CAPE-MARIGOLD	naturalized	acceptance uncertain
Diodia teres Walter	RUBIACEAE	POOR JOE; ROUGH BUTTONWEED	native	
Diospyros virginiana L.	EBENACEAE		naturalized	
Diospyros virginiana L. var. virginiana	EBENACEAE		naturalized	
Diplotaxis muralis (L.) DC.	BRASSICACEAE	WALL ROCKET	naturalized	
Diplotaxis tenuifolia (L.) DC.	BRASSICACEAE	WALL ROCKET	naturalized	
Dipogon lignosus (L.) Verdc.	FABACEAE		naturalized	acceptance uncertain
Dipsacus fullonum L.	DIPSACACEAE	WILD TEASEL	naturalized	
Dipsacus sativus (L.) Honck.	DIPSACACEAE	FULLER'S TEASEL	naturalized	
Dirca occidentalis A. Gray	THYMELAEACEAE	WESTERN LEATHERWOOD	native	
Dissanthelium californicum (Nutt.) Benth.	POACEAE	CALIFORNIA DISSANTHELIUM	native	
Distichlis spicata (L.) Greene	POACEAE	SALTGRASS	native	
Ditaxis californica (Brandegee) Pax & K. Hoffm.	EUPHORBIACEAE	CALIFORNIA DITAXIS	native	
Ditaxis claryana (Jeps.) Webster	EUPHORBIACEAE	GLANDULAR DITAXIS	native	
Ditaxis lanceolata (Benth.) Pax & K. Hoffm.	EUPHORBIACEAE		native	
Ditaxis neomexicana (Muell. Arg.) A. Heller	EUPHORBIACEAE		native	
Ditaxis serrata (Torr.) A. Heller	EUPHORBIACEAE		native	
Dithyrea californica Harv.	BRASSICACEAE	SPECTACLE-POD	native	
Dithyrea maritima (Davidson) Davidson	BRASSICACEAE	BEACH SPECTACLE-POD	native	
Dittrichia graveolens (L.) Greuter	ASTERACEAE		naturalized	
Dodecahema leptoceras (A. Gray) Reveal & Hardham	POLYGONACEAE	SLENDER-HORNED SPINEFLOWER	native	
Dodecatheon alpinum (A. Gray) Greene	PRIMULACEAE	ALPINE SHOOTING STAR	native	
Dodecatheon clevelandii Greene	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon clevelandii Greene subsp. clevelandii	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon clevelandii Greene subsp. insulare H. J. Thomps.	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon clevelandii Greene subsp. patulum (Kuntze) H. J. Thomps.	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon clevelandii Greene subsp. sanctarum (Greene) Abrams	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon conjugens Greene	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon hendersonii A. Gray	PRIMULACEAE	MOSQUITO BILLS; SAILOR CAPS	native	
Dodecatheon jeffreyi Van Houtte	PRIMULACEAE	SIERRA SHOOTING STAR	native	
Dodecatheon pulchellum (Raf.) Merr.	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon redolens (H. M. Hall) H. J. Thomps.	PRIMULACEAE	SHOOTING STAR	native	
Dodecatheon subalpinum Eastw.	PRIMULACEAE	SHOOTING STAR	native	
Dolichos lignosus L.	FABACEAE		naturalized	acceptance uncertain
Dopatrium junceum (Roxb.) Buch.-Ham. ex Benth.	PLANTAGINACEAE		naturalized	
Downingia bacigalupii Weiler	CAMPANULACEAE		native	
Downingia bella Hoover	CAMPANULACEAE		native	
Downingia bicornuta A. Gray	CAMPANULACEAE		native	
Downingia bicornuta A. Gray var. bicornuta	CAMPANULACEAE		native	
Downingia bicornuta A. Gray var. picta Hoover	CAMPANULACEAE		native	
Downingia concolor Greene	CAMPANULACEAE		native	
Downingia concolor Greene var. brevior McVaugh	CAMPANULACEAE	CUYAMACA LAKE DOWNINGIA	native	
Downingia concolor Greene var. concolor	CAMPANULACEAE		native	
Downingia cuspidata (Greene) Rattan	CAMPANULACEAE		native	
Downingia elegans (Douglas ex Lindl.) Torr.	CAMPANULACEAE		native	
Downingia insignis Greene	CAMPANULACEAE		native	
Downingia laeta (Greene) Greene	CAMPANULACEAE		native	
Downingia montana Greene	CAMPANULACEAE		native	
Downingia ornatissima Greene	CAMPANULACEAE		native	
Downingia ornatissima Greene var. eximia (Hoover) McVaugh	CAMPANULACEAE		native	
Downingia ornatissima Greene var. ornatissima	CAMPANULACEAE		native	
Downingia pulchella (Lindl.) Torr.	CAMPANULACEAE		native	
Downingia pulcherrima M. Peck	CAMPANULACEAE		native	
Downingia pusilla (G. Don ex A. DC.) Torr.	CAMPANULACEAE		native	
Downingia willamettensis M. Peck	CAMPANULACEAE		native	
Draba albertina Greene	BRASSICACEAE		native	
Draba asterophora Payson	BRASSICACEAE		native	
Draba asterophora Payson var. asterophora	BRASSICACEAE	TAHOE DRABA	native	
Draba asterophora Payson var. macrocarpa C. L. Hitchc.	BRASSICACEAE	CUP LAKE DRABA	native	
Draba aureola S. Watson	BRASSICACEAE	GOLDEN DRABA	native	
Draba breweri S. Watson	BRASSICACEAE		native	
Draba breweri S. Watson var. breweri	BRASSICACEAE		native	
Draba breweri S. Watson var. cana (Rydb.) Rollins	BRASSICACEAE		native	
Draba californica (Jeps.) Rollins & R. A. Price	BRASSICACEAE	CALIFORNIA DRABA	native	
Draba carnosula O. E. Schulz	BRASSICACEAE	MOUNT EDDY DRABA	native	
Draba corrugata S. Watson	BRASSICACEAE		native	
Draba corrugata S. Watson var. corrugata	BRASSICACEAE		native	
Draba corrugata S. Watson var. saxosa (Davidson) Munz & I. M. Johnst.	BRASSICACEAE		native	
Draba cruciata Payson	BRASSICACEAE	MINERAL KING DRABA	native	
Draba cuneifolia Torr. & A. Gray	BRASSICACEAE		native	
Draba densifolia Nutt.	BRASSICACEAE		native	
Draba howellii S. Watson	BRASSICACEAE	HOWELL'S DRABA	native	
Draba incrassata (Rollins) Rollins & R. A. Price	BRASSICACEAE	SWEETWATER MOUNTAINS DRABA	native	
Draba lemmonii S. Watson	BRASSICACEAE		native	
Draba lemmonii S. Watson var. lemmonii	BRASSICACEAE		native	
Draba lonchocarpa Rydb.	BRASSICACEAE		native	
Draba lonchocarpa Rydb. var. lonchocarpa	BRASSICACEAE	SPEAR-FRUITED DRABA	native	
Draba monoensis Rollins & R. A. Price	BRASSICACEAE	WHITE MOUNTAINS DRABA	native	
Draba nemorosa L.	BRASSICACEAE		naturalized	
Draba oligosperma Hook.	BRASSICACEAE		native	
Draba oligosperma Hook. var. oligosperma	BRASSICACEAE		native	
Draba paysonii J. F. Macbr.	BRASSICACEAE		native	
Draba paysonii J. F. Macbr. var. treleasei (O. E. Schulz) C. L. Hitchc.	BRASSICACEAE		native	
Draba praealta Greene	BRASSICACEAE		native	
Draba pterosperma Payson	BRASSICACEAE	WINGED-SEED DRABA	native	
Draba reptans (Lam.) Fernald	BRASSICACEAE		naturalized	
Draba sharsmithii Rollins & R. A. Price	BRASSICACEAE	MOUNT WHITNEY DRABA	native	
Draba sierrae Sharsm.	BRASSICACEAE	SIERRA DRABA	native	
Draba subumbellata Rollins & R. A. Price	BRASSICACEAE	WHITE MOUNTAINS CUSHION DRABA	native	
Draba verna L.	BRASSICACEAE		native	
Draperia systyla (A. Gray) Torr. ex A. Gray	BORAGINACEAE		native	
Drosanthemum floribundum (Haw.) Schwantes	AIZOACEAE		naturalized	
Drosera anglica Huds.	DROSERACEAE	ENGLISH LONG-LEAVED SUNDEW	native	
Drosera rotundifolia L.	DROSERACEAE	ROUND-LEAVED SUNDEW	native	
Dryopteris arguta (Kaulf.) Maxon	DRYOPTERIDACEAE	WOOD FERN	native	
Dryopteris expansa (C. Presl) Fraser-Jenk. & Jermy	DRYOPTERIDACEAE	WOOD FERN	native	
Dryopteris filix-mas (L.) Schott	DRYOPTERIDACEAE	MALE FERN	native	
Duchesnea indica (Andrews) Focke	ROSACEAE	MOCK-STRAWBERRY	naturalized	
Dudleya abramsii Rose	CRASSULACEAE		native	
Dudleya abramsii Rose subsp. abramsii	CRASSULACEAE		native	
Dudleya abramsii Rose subsp. affinis K. M. Nakai	CRASSULACEAE	SAN BERNARDINO MOUNTAINS DUDLEYA	native	
Dudleya abramsii Rose subsp. bettinae (Hoover) Bartel	CRASSULACEAE	BETTY'S LIVEFOREVER; SAN LUIS OBISPO SERPENTINE DUDLEYA	native	
Dudleya abramsii Rose subsp. calcicola (Bartel & Shevock) K. M. Nakai	CRASSULACEAE		native	
Dudleya abramsii Rose subsp. murina (Eastw.) Moran	CRASSULACEAE	MOUSE-LEAVED DUDLEYA; SAN LUIS OBISPO DUDLEYA	native	
Dudleya abramsii Rose subsp. setchellii (Jeps.) Morin	CRASSULACEAE		native	
Dudleya arizonica Rose	CRASSULACEAE		native	
Dudleya attenuata (S. Watson) Moran	CRASSULACEAE		native	
Dudleya attenuata (S. Watson) Moran subsp. attenuata	CRASSULACEAE		native	
Dudleya blochmaniae (Eastw.) Moran	CRASSULACEAE		native	
Dudleya blochmaniae (Eastw.) Moran subsp. blochmaniae	CRASSULACEAE	BLOCHMAN'S DUDLEYA	native	
Dudleya blochmaniae (Eastw.) Moran subsp. insularis (Moran) Moran	CRASSULACEAE	SANTA ROSA ISLAND DUDLEYA	native	
Dudleya brevifolia (Moran) Moran	CRASSULACEAE		native	
Dudleya caespitosa (Haw.) Britton & Rose	CRASSULACEAE		native	
Dudleya candelabrum Rose	CRASSULACEAE	CANDLEHOLDER DUDLEYA	native	
Dudleya cymosa (Lem.) Britton & Rose	CRASSULACEAE		native	
Dudleya cymosa (Lem.) Britton & Rose subsp. agourensis K. M. Nakai	CRASSULACEAE		native	
Dudleya cymosa (Lem.) Britton & Rose subsp. costatifolia Bartel & Shevock	CRASSULACEAE		native	
Dudleya cymosa (Lem.) Britton & Rose subsp. crebrifolia K. M. Nakai & Verity	CRASSULACEAE	SAN GABRIEL RIVER DUDLEYA	native	
Dudleya cymosa (Lem.) Britton & Rose subsp. cymosa	CRASSULACEAE		native	
Dudleya cymosa (Lem.) Britton & Rose subsp. marcescens Moran	CRASSULACEAE	MARCESCENT DUDLEYA; SANTA MONICA MOUNTAINS DUDLEYA	native	
Dudleya cymosa (Lem.) Britton & Rose subsp. ovatifolia (Britton) Moran	CRASSULACEAE	SANTA MONICA MOUNTAINS DUDLEYA	native	
Dudleya cymosa (Lem.) Britton & Rose subsp. paniculata (Jeps.) K. M. Nakai	CRASSULACEAE		native	
Dudleya cymosa (Lem.) Britton & Rose subsp. pumila (Rose) K. M. Nakai	CRASSULACEAE		native	
Dudleya densiflora (Rose) Moran	CRASSULACEAE	SAN GABRIEL MOUNTAINS DUDLEYA	native	
Dudleya edulis (Nutt.) Moran	CRASSULACEAE		native	
Dudleya farinosa (Lindl.) Britton & Rose	CRASSULACEAE		native	
Dudleya gnoma S. W. McCabe	CRASSULACEAE		native	
Dudleya greenei Rose	CRASSULACEAE	GREENE'S DUDLEYA	native	
Dudleya lanceolata (Nutt.) Britton & Rose	CRASSULACEAE		native	
Dudleya multicaulis (Rose) Moran	CRASSULACEAE	MANY-STEMMED DUDLEYA	native	
Dudleya nesiotica (Moran) Moran	CRASSULACEAE	SANTA CRUZ ISLAND DUDLEYA	native	
Dudleya palmeri (S. Watson) Britton & Rose	CRASSULACEAE		native	
Dudleya parva Rose & Davidson	CRASSULACEAE		native	
Dudleya pulverulenta (Nutt.) Britton & Rose	CRASSULACEAE		native	
Dudleya saxosa (M. E. Jones) Britton & Rose	CRASSULACEAE		native	
Dudleya saxosa (M. E. Jones) Britton & Rose subsp. aloides (Rose) Moran	CRASSULACEAE		native	
Dudleya saxosa (M. E. Jones) Britton & Rose subsp. saxosa	CRASSULACEAE	PANAMINT DUDLEYA	native	
Dudleya stolonifera Moran	CRASSULACEAE	LAGUNA BEACH DUDLEYA	native	
Dudleya traskiae (Rose) Moran	CRASSULACEAE	SANTA BARBARA ISLAND DUDLEYA	native	
Dudleya variegata (S. Watson) Moran	CRASSULACEAE	VARIEGATED DUDLEYA	native	
Dudleya verityi K. M. Nakai	CRASSULACEAE	VERITY'S DUDLEYA	native	
Dudleya virens (Rose) Moran	CRASSULACEAE	BRIGHT GREEN DUDLEYA; GREEN LIVEFOREVER	native	
Dudleya virens (Rose) Moran subsp. hassei (Rose) Moran	CRASSULACEAE		native	
Dudleya virens (Rose) Moran subsp. insularis (Rose) Moran	CRASSULACEAE		native	
Dudleya virens (Rose) Moran subsp. virens	CRASSULACEAE		native	
Dudleya viscida (S. Watson) Moran	CRASSULACEAE	STICKY DUDLEYA; STICKY-LEAVED LIVEFOREVER	native	
Dulichium arundinaceum (L.) Britton	CYPERACEAE	THREE-WAY SEDGE	native	
Dysphania ambrosioides (L.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dysphania anthelmintica (L.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dysphania botrys (L.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dysphania chilensis (Schrad.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dysphania multifida (L.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dysphania pumilio (R. Br.) Mosyakin & Clemants	CHENOPODIACEAE		naturalized	
Dyssodia tenuiloba (DC.) B. L. Rob. var. tenuiloba	ASTERACEAE		naturalized	acceptance uncertain
Eastwoodia elegans Brandegee	ASTERACEAE	YELLOW MOCK ASTER	native	
Eatonella nivea (D.C. Eaton) A. Gray	ASTERACEAE		native	
Echinocactus polycephalus Engelm. & J. M. Bigelow	CACTACEAE	CLUSTERED BARREL CACTUS	native	
Echinocactus polycephalus Engelm. & J. M. Bigelow var. polycephalus	CACTACEAE	CLUSTERED BARREL CACTUS	native	
Echinocereus engelmannii (Parry ex Engelm.) Lem.	CACTACEAE	HEDGEHOG CACTUS	native	
Echinocereus mojavensis Engelm. & J. M. Bigelow	CACTACEAE		native	
Echinochloa colona (L.) Link	POACEAE		naturalized	
Echinochloa crus-galli (L.) P. Beauv.	POACEAE		naturalized	
Echinochloa crus-galli (L.) P. Beauv. subsp. spiralis (Vasinger) Tzvelev	POACEAE		naturalized	
Echinochloa crus-pavonis (Kunth) Schult.	POACEAE		naturalized	
Echinochloa esculenta (A. Braun) H. Scholz	POACEAE		naturalized	acceptance uncertain
Echinochloa muricata (P. Beauv.) Fernald	POACEAE		naturalized	
Echinochloa oryzicola Vasinger	POACEAE		naturalized	acceptance uncertain
Echinochloa oryzoides (Ard.) Fritsch	POACEAE		naturalized	
Echinodorus berteroi (Spreng.) Fassett	ALISMATACEAE	BURHEAD	native	
Echinomastus johnsonii (Parry ex Engelm.) E. M. Baxter	CACTACEAE		native	acceptance uncertain
Echinops sphaerocephalus L.	ASTERACEAE	GLOBE THISTLE	naturalized	
Echium candicans L. f.	BORAGINACEAE		naturalized	
Echium lusitanicum L.	BORAGINACEAE		naturalized	acceptance uncertain
Echium plantagineum L.	BORAGINACEAE		naturalized	
Eclipta prostrata (L.) L.	ASTERACEAE		native	
Egeria densa Planch.	HYDROCHARITACEAE	BRAZILIAN WATERWEED	naturalized	
Ehrendorferia chrysantha (Hook. & Arn.) Rylander	PAPAVERACEAE		native	
Ehrendorferia ochroleuca (Engelm.) Fukuhara	PAPAVERACEAE		native	
Ehrharta calycina Sm.	POACEAE	VELDT GRASS	naturalized	
Ehrharta erecta Lam.	POACEAE		naturalized	
Ehrharta longiflora Sm.	POACEAE		naturalized	
Eichhornia crassipes (Mart.) Solms	PONTEDERIACEAE	WATER HYACINTH	naturalized	
Elaeagnus angustifolia L.	ELAEAGNACEAE	OLEASTER; RUSSIAN OLIVE	naturalized	
Elatine ambigua Wight	ELATINACEAE	WATERWORT	naturalized	
Elatine brachysperma A. Gray	ELATINACEAE	WATERWORT	native	
Elatine californica A. Gray	ELATINACEAE	WATERWORT	native	
Elatine chilensis Gay	ELATINACEAE	WATERWORT	native	
Elatine heterandra H. Mason	ELATINACEAE	WATERWORT	native	
Elatine rubella Rydb.	ELATINACEAE	WATERWORT	native	
Eleocharis acicularis (L.) Roem. & Schult.	CYPERACEAE	SPIKERUSH	native	
Eleocharis acicularis (L.) Roem. & Schult. var. occidentalis Svenson	CYPERACEAE		native	acceptance uncertain
Eleocharis atropurpurea (Retz.) J. Presl & C. Presl	CYPERACEAE	SPIKERUSH	native	
Eleocharis bella (Piper) Svenson	CYPERACEAE		native	acceptance uncertain
Eleocharis bolanderi A. Gray	CYPERACEAE	SPIKERUSH	native	
Eleocharis coloradoensis (Britton) Gilly	CYPERACEAE		native	
Eleocharis decumbens C. B. Clarke	CYPERACEAE		native	acceptance uncertain
Eleocharis engelmannii Steud.	CYPERACEAE		native	
Eleocharis flavescens (Poir.) Urb.	CYPERACEAE		native	
Eleocharis flavescens (Poir.) Urb. var. flavescens	CYPERACEAE		native	
Eleocharis geniculata (L.) Roem. & Schult.	CYPERACEAE	SPIKERUSH	native	
Eleocharis macrostachya Britton	CYPERACEAE	SPIKERUSH	native	
Eleocharis montevidensis Kunth	CYPERACEAE	SPIKERUSH	native	
Eleocharis obtusa (Willd.) Schult.	CYPERACEAE	SPIKERUSH	native	
Eleocharis obtusa (Willd.) Schult. var. obtusa	CYPERACEAE	SPIKERUSH	native	
Eleocharis ovata (Roth) Roem. & Schult.	CYPERACEAE		native	acceptance uncertain
Eleocharis pachycarpa E. Desv.	CYPERACEAE	SPIKERUSH	naturalized	
Eleocharis parishii Britton	CYPERACEAE	SPIKERUSH	native	
Eleocharis parvula (Roem. & Schult.) Link ex Bluff, Nees & Schauer	CYPERACEAE	SMALL SPIKERUSH	native	
Eleocharis quadrangulata (Michx.) Roem. & Schult.	CYPERACEAE	FOUR-ANGLED SPIKERUSH	naturalized	
Eleocharis quinqueflora (Hartmann) O. Schwarz	CYPERACEAE	SPIKERUSH	native	
Eleocharis radicans (Poir.) Kunth	CYPERACEAE	SPIKERUSH	native	
Eleocharis rostellata (Torr.) Torr.	CYPERACEAE	SPIKERUSH	native	
Eleocharis thermalis Rydb.	CYPERACEAE	SPIKERUSH	native	
Eleocharis torticulmis S. G. Sm.	CYPERACEAE		native	
Eleusine indica (L.) Gaertn.	POACEAE	GOOSE GRASS	naturalized	
Eleusine tristachya (Lam.) Lam.	POACEAE		naturalized	
Elodea bifoliata H. St. John	HYDROCHARITACEAE		native	
Elodea canadensis Michx.	HYDROCHARITACEAE	COMMON WATERWEED	native	
Elodea nuttallii (Planch.) H. St. John	HYDROCHARITACEAE	NUTTALL'S WATERWEED	native	
Elymus arizonicus (Scribn. & J. G. Sm.) Gould	POACEAE	ARIZONA WHEATGRASS	naturalized	
Elymus californicus (Bol.) Gould	POACEAE	CALIFORNIA BOTTLEBRUSH GRASS	native	acceptance uncertain
Elymus canadensis L.	POACEAE	CANADIAN WILDRYE	naturalized	
Elymus elymoides (Raf.) Swezey	POACEAE	SQUIRRELTAIL	native	
Elymus elymoides (Raf.) Swezey subsp. brevifolius (J. G. Sm.) Barkworth	POACEAE		native	
Elymus elymoides (Raf.) Swezey subsp. californicus (J. G. Sm.) Barkworth	POACEAE		native	
Elymus elymoides (Raf.) Swezey subsp. elymoides	POACEAE		native	
Elymus elymoides (Raf.) Swezey subsp. hordeoides (Suksd.) Barkworth	POACEAE		native	
Elymus glaucus Buckley	POACEAE	BLUE WILDRYE	native	
Elymus glaucus Buckley subsp. glaucus	POACEAE		native	
Elymus glaucus Buckley subsp. jepsonii (Burtt Davy) Gould	POACEAE		native	
Elymus glaucus Buckley subsp. virescens (Piper) Gould	POACEAE		native	
Elymus lanceolatus (Scribn. & J. G. Sm.) Gould	POACEAE		native	
Elymus lanceolatus (Scribn. & J. G. Sm.) Gould subsp. lanceolatus	POACEAE	THICKSPIKE WHEATGRASS	native	
Elymus multisetus (J. G. Sm.) Burtt Davy	POACEAE	BIG SQUIRRELTAIL	native	
Elymus scribneri (Vasey) M. E. Jones	POACEAE	SCRIBNER'S WHEATGRASS	native	
Elymus sierrae Gould	POACEAE		native	
Elymus stebbinsii Gould	POACEAE		native	
Elymus stebbinsii Gould subsp. septentrionalis Barkworth	POACEAE		native	
Elymus stebbinsii Gould subsp. stebbinsii	POACEAE		native	
Elymus trachycaulus (Link) Shinners	POACEAE	SLENDER WHEATGRASS	native	
Elymus trachycaulus (Link) Shinners subsp. subsecundus (Link) Gould	POACEAE		native	
Elymus trachycaulus (Link) Shinners subsp. trachycaulus	POACEAE		native	
Elytrigia elongata (Host) Nevski	POACEAE	TALL WHEATGRASS	naturalized	
Elytrigia intermedia (Host) Nevski	POACEAE		naturalized	
Elytrigia intermedia (Host) Nevski subsp. intermedia	POACEAE	INTERMEDIATE WHEATGRASS	naturalized	
Elytrigia juncea (L.) Nevski	POACEAE		naturalized	
Elytrigia juncea (L.) Nevski subsp. boreo-atlantica (Simonet & Guin.) Hyl.	POACEAE		naturalized	
Elytrigia pontica (Podp.) Holub	POACEAE		naturalized	
Elytrigia pontica (Podp.) Holub subsp. pontica	POACEAE	TALL WHEATGRASS	naturalized	
Elytrigia repens (L.) Desv. ex Nevski	POACEAE	QUACKGRASS	naturalized	
Emex australis Steinh.	POLYGONACEAE	THREE-CORNERED JACK	naturalized	
Emex spinosa (L.) Campd.	POLYGONACEAE	DEVIL'S THORN	naturalized	
Emmenanthe penduliflora Benth.	BORAGINACEAE	WHISPERING BELLS	native	
Emmenanthe penduliflora Benth. var. penduliflora	BORAGINACEAE		native	
Emmenanthe penduliflora Benth. var. rosea Brand	BORAGINACEAE		native	
Empetrum nigrum L.	EMPETRACEAE	BLACK CROWBERRY	native	
Encelia actoni Elmer	ASTERACEAE		native	
Encelia californica Nutt.	ASTERACEAE		native	
Encelia farinosa A. Gray ex Torr.	ASTERACEAE	BRITTLEBUSH; INCIENSO	native	
Encelia frutescens (A. Gray) A. Gray	ASTERACEAE		native	
Encelia virginensis A. Nelson	ASTERACEAE		native	
Enceliopsis covillei (A. Nelson) S. F. Blake	ASTERACEAE	PANAMINT DAISY	native	
Enceliopsis nudicaulis (A. Gray) A. Nelson	ASTERACEAE	NAKED-STEMMED DAISY	native	
Enemion occidentale (Hook. & Arn.) J. R. Drumm. & Hutch.	RANUNCULACEAE		native	acceptance uncertain
Enemion stipitatum (A. Gray) J. R. Drumm. & Hutch.	RANUNCULACEAE		native	acceptance uncertain
Enneapogon desvauxii P. Beauv.	POACEAE	NINE-AWNED PAPPUS GRASS	native	
Ephedra aspera Engelm. ex S. Watson	EPHEDRACEAE	EPHEDRA; MORMON TEA	native	
Ephedra californica S. Watson	EPHEDRACEAE	DESERT TEA	native	
Ephedra foeminea Forssk.	EPHEDRACEAE		naturalized	
Ephedra funerea Coville & C. V. Morton	EPHEDRACEAE	DEATH VALLEY EPHEDRA	native	
Ephedra nevadensis S. Watson	EPHEDRACEAE	EPHEDRA; MORMON TEA	native	
Ephedra trifurca Torr. ex S. Watson	EPHEDRACEAE	EPHEDRA; MORMON TEA	native	
Ephedra viridis Coville	EPHEDRACEAE	GREEN EPHEDRA	native	
Epilobium anagallidifolium Lam.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium brachycarpum C. Presl	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium canum (Greene) P. H. Raven	ONAGRACEAE	CALIFORNIA FUCHSIA; ZAUSCHNERIA	native	
Epilobium canum (Greene) P. H. Raven subsp. canum	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium canum (Greene) P. H. Raven subsp. garrettii (A. Nelson) P. H. Raven	ONAGRACEAE		native	
Epilobium canum (Greene) P. H. Raven subsp. latifolium (Hook.) P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium ciliatum Raf.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium ciliatum Raf. subsp. ciliatum	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium ciliatum Raf. subsp. glandulosum (Lehm.) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium ciliatum Raf. subsp. watsonii (Barbey) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium clavatum Trel.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium cleistogamum (Curran) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium densiflorum (Lindl.) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium foliosum (Torr. & A. Gray) Suksd.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium glaberrimum Barbey	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium glaberrimum Barbey subsp. fastigiatum (Nutt.) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium glaberrimum Barbey subsp. glaberrimum	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium hallianum Hausskn.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium hornemannii Rchb.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium hornemannii Rchb. subsp. hornemannii	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium howellii Hoch	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium lactiflorum Hausskn.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium latifolium L.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium leptophyllum Raf.	ONAGRACEAE	FIREWEED; WILLOW HERB	naturalized	
Epilobium luteum Pursh	ONAGRACEAE	YELLOW WILLOWHERB	native	
Epilobium minutum Lindl.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium nivium Brandegee	ONAGRACEAE	SNOW MOUNTAIN WILLOWHERB	native	
Epilobium obcordatum A. Gray	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium oreganum Greene	ONAGRACEAE	OREGON FIREWEED	native	
Epilobium oregonense Hausskn.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium pallidum (Eastw.) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium palustre L.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium pygmaeum (Speg.) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium rigidum Hausskn.	ONAGRACEAE	SISKIYOU MOUNTAINS WILLOWHERB	native	
Epilobium saximontanum Hausskn.	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epilobium septentrionale (D. D. Keck) R. N. Bowman & Hoch	ONAGRACEAE	HUMBOLDT COUNTY FUCHSIA	native	
Epilobium siskiyouense (Munz) Hoch & P. H. Raven	ONAGRACEAE	SISKIYOU FIREWEED	native	
Epilobium torreyi (S. Watson) Hoch & P. H. Raven	ONAGRACEAE	FIREWEED; WILLOW HERB	native	
Epipactis gigantea Douglas	ORCHIDACEAE	STREAM ORCHID	native	
Epipactis helleborine (L.) Crantz	ORCHIDACEAE		naturalized	
Equisetum arvense L.	EQUISETACEAE	COMMON HORSETAIL	native	
Equisetum hyemale L.	EQUISETACEAE	HORSETAIL; SCOURING RUSH	native	
Equisetum hyemale L. subsp. affine (Engelm.) Calder & Roy L. Taylor	EQUISETACEAE	COMMON SCOURING RUSH	native	
Equisetum laevigatum A. Braun	EQUISETACEAE	SMOOTH SCOURING RUSH	native	
Equisetum palustre L.	EQUISETACEAE	MARSH HORSETAIL	native	
Equisetum telmateia Ehrh.	EQUISETACEAE	HORSETAIL; SCOURING RUSH	native	
Equisetum telmateia Ehrh. subsp. braunii (J. Milde) Hauke	EQUISETACEAE	GIANT HORSETAIL	native	
Eragrostis barrelieri Daveau	POACEAE	LOVEGRASS	naturalized	
Eragrostis cilianensis (All.) Vignolo ex Janch.	POACEAE	STINKGRASS	naturalized	
Eragrostis curvula (Schrad.) Nees	POACEAE	LOVEGRASS	naturalized	
Eragrostis curvula (Schrad.) Nees var. conferta Nees	POACEAE		naturalized	acceptance uncertain
Eragrostis curvula (Schrad.) Nees var. curvula	POACEAE	WEEPING LOVEGRASS	naturalized	acceptance uncertain
Eragrostis hypnoides (Lam.) Britton, Sterns & Poggenb.	POACEAE	LOVEGRASS	native	
Eragrostis lehmanniana Nees	POACEAE	LEHMANN LOVEGRASS	naturalized	
Eragrostis lutescens Scribn.	POACEAE	LOVEGRASS	native	
Eragrostis mexicana (Hornem.) Link	POACEAE	LOVEGRASS	native	
Eragrostis mexicana (Hornem.) Link subsp. mexicana	POACEAE	LOVEGRASS	native	
Eragrostis mexicana (Hornem.) Link subsp. virescens (J. Presl) S. D. Koch & Sánchez Vega	POACEAE	LOVEGRASS	native	
Eragrostis minor Host	POACEAE	LOVEGRASS	naturalized	
Eragrostis pectinacea (Michx.) Nees	POACEAE	LOVEGRASS	native	
Eragrostis pectinacea (Michx.) Nees var. miserrima (E. Fourn.) Reeder	POACEAE	LOVEGRASS	native	
Eragrostis pectinacea (Michx.) Nees var. pectinacea	POACEAE	LOVEGRASS	native	
Eragrostis pilosa (L.) P. Beauv.	POACEAE	LOVEGRASS	native	
Eragrostis pilosa (L.) P. Beauv. var. pilosa	POACEAE	LOVEGRASS	native	
Eremalche exilis (A. Gray) Greene	MALVACEAE		native	
Eremalche parryi (Greene) Greene	MALVACEAE		native	
Eremalche parryi (Greene) Greene subsp. kernensis (C. B. Wolf) D. M. Bates	MALVACEAE	KERN MALLOW	native	
Eremalche parryi (Greene) Greene subsp. parryi	MALVACEAE		native	
Eremalche rotundifolia (A. Gray) Greene	MALVACEAE	DESERT FIVE-SPOT	native	
Eremogone aculeata (S. Watson) Ikonn.	CARYOPHYLLACEAE		native	
Eremogone cliftonii Rabeler & R. L. Hartm.	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn.	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. charlestonensis (Maguire) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. congesta	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. crassula (Maguire) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. simulans (Maguire) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. subcongesta (S. Watson) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone congesta (Nutt.) Ikonn. var. suffrutescens (A. Gray) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone ferrisiae (Abrams) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone kingii (S. Watson) Ikonn.	CARYOPHYLLACEAE		native	
Eremogone kingii (S. Watson) Ikonn. var. glabrescens (S. Watson) Dorn	CARYOPHYLLACEAE		native	
Eremogone macradenia (S. Watson) Ikonn.	CARYOPHYLLACEAE		native	
Eremogone macradenia (S. Watson) Ikonn. var. arcuifolia (Maguire) R. L. Hartm. & Rabeler	CARYOPHYLLACEAE		native	
Eremogone macradenia (S. Watson) Ikonn. var. macradenia	CARYOPHYLLACEAE		native	
Eremogone ursina (B.L. Rob.) Ikonn.	CARYOPHYLLACEAE		native	
Eriastrum abramsii (Elmer) H. Mason	POLEMONIACEAE		native	
Eriastrum brandegeeae H. Mason	POLEMONIACEAE	BRANDEGEE'S ERIASTRUM	native	
Eriastrum densifolium (Benth.) H. Mason	POLEMONIACEAE		native	
Eriastrum densifolium (Benth.) H. Mason subsp. austromontanum (T. T. Craig) H. Mason	POLEMONIACEAE		native	
Eriastrum densifolium (Benth.) H. Mason subsp. densifolium	POLEMONIACEAE		native	
Eriastrum densifolium (Benth.) H. Mason subsp. elongatum (Benth.) H. Mason	POLEMONIACEAE		native	
Eriastrum densifolium (Benth.) H. Mason subsp. mohavense (T. T. Craig) H. Mason	POLEMONIACEAE		native	
Eriastrum densifolium (Benth.) H. Mason subsp. sanctorum (Milliken) H. Mason	POLEMONIACEAE	SANTA ANA RIVER WOOLLYSTAR	native	
Eriastrum diffusum (A. Gray) H. Mason	POLEMONIACEAE		native	
Eriastrum eremicum (Jeps.) H. Mason	POLEMONIACEAE		native	
Eriastrum eremicum (Jeps.) H. Mason subsp. eremicum	POLEMONIACEAE		native	
Eriastrum filifolium (Nutt.) Wooton & Standl.	POLEMONIACEAE		native	
Eriastrum hooveri (Jeps.) H. Mason	POLEMONIACEAE	HOOVER'S ERIASTRUM	native	
Eriastrum luteum (Benth.) H. Mason	POLEMONIACEAE	YELLOW-FLOWERED ERIASTRUM	native	
Eriastrum pluriflorum (A. Heller) H. Mason	POLEMONIACEAE	MANY-FLOWERED ERIASTRUM	native	
Eriastrum sapphirinum (Eastw.) H. Mason	POLEMONIACEAE		native	
Eriastrum sparsiflorum (Eastw.) H. Mason	POLEMONIACEAE		native	
Eriastrum virgatum (Benth.) H. Mason	POLEMONIACEAE	VIRGATE ERIASTRUM	native	
Eriastrum wilcoxii (A. Nelson) H. Mason	POLEMONIACEAE		native	
Erica lusitanica Rudolphi	ERICACEAE	HEATH	naturalized	
Ericameria albida (M. E. Jones ex A. Gray) L. C. Anderson	ASTERACEAE		native	
Ericameria arborescens (A. Gray) Greene	ASTERACEAE	GOLDEN-FLEECE	native	
Ericameria bloomeri (A. Gray) J. F. Macbr.	ASTERACEAE	GOLDENBUSH	native	
Ericameria brachylepis (A. Gray) H. M. Hall	ASTERACEAE	BOUNDARY GOLDENBUSH	native	
Ericameria cooperi (A. Gray) H. M. Hall	ASTERACEAE	GOLDENBUSH	native	
Ericameria cooperi (A. Gray) H. M. Hall var. cooperi	ASTERACEAE	GOLDENBUSH	native	
Ericameria cuneata (A. Gray) McClatchie	ASTERACEAE	GOLDENBUSH	native	
Ericameria cuneata (A. Gray) McClatchie var. cuneata	ASTERACEAE	GOLDENBUSH	native	
Ericameria cuneata (A. Gray) McClatchie var. macrocephala Urbatsch	ASTERACEAE	LAGUNA MOUNTAIN GOLDENBUSH	native	
Ericameria cuneata (A. Gray) McClatchie var. spathulata (A. Gray) H. M. Hall	ASTERACEAE	GOLDENBUSH	native	
Ericameria discoidea (Nutt.) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Ericameria discoidea (Nutt.) G. L. Nesom var. discoidea	ASTERACEAE		native	acceptance uncertain
Ericameria ericoides (Less.) Nutt. ex Jeps.	ASTERACEAE	GOLDENBUSH	native	
Ericameria fasciculata (Eastw.) J. F. Macbr.	ASTERACEAE	EASTWOOD'S GOLDENBUSH	native	
Ericameria gilmanii (S. F. Blake) G. L. Nesom	ASTERACEAE	GILMAN'S ERICAMERIA	native	
Ericameria greenei (A. Gray) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Ericameria laricifolia (A. Gray) Shinners	ASTERACEAE	TURPENTINE-BRUSH	native	
Ericameria linearifolia (DC.) Urbatsch & Wussow	ASTERACEAE	INTERIOR GOLDENBUSH	native	
Ericameria nana Nutt.	ASTERACEAE	GOLDENBUSH	native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. bernardina (H. M. Hall) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. ceruminosa (Durand & Hilg.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. hololeuca (A. Gray) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. leiosperma (A. Gray) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. oreophila (A. Nelson) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. speciosa (Nutt.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria nauseosa (Pall.) G. L. Nesom & G. I. Baird var. washoensis (L. C. Anderson) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria ophitidis (J. T. Howell) G. L. Nesom	ASTERACEAE	SERPENTINE GOLDENBUSH	native	
Ericameria palmeri (A. Gray) H. M. Hall	ASTERACEAE	GOLDENBUSH	native	
Ericameria palmeri (A. Gray) H. M. Hall var. pachylepis (H. M. Hall) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Ericameria palmeri (A. Gray) H. M. Hall var. palmeri	ASTERACEAE	PALMER'S GOLDENBUSH	native	
Ericameria paniculata (A. Gray) Rydb.	ASTERACEAE		native	
Ericameria parishii (Greene) H. M. Hall	ASTERACEAE	GOLDENBUSH	native	
Ericameria parishii (Greene) H. M. Hall var. parishii	ASTERACEAE	GOLDENBUSH	native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. aspera (Greene) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. imula (H. M. Hall & Clem.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. latior (H. M. Hall & Clem.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. monocephala (A. Nelson & P. B. Kenn.) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. nevadensis (A. Gray) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria parryi (A. Gray) G. L. Nesom & G. I. Baird var. vulcanica (Greene) G. L. Nesom & G. I. Baird	ASTERACEAE		native	
Ericameria pinifolia (A. Gray) H. M. Hall	ASTERACEAE	PINE-BUSH	native	
Ericameria suffruticosa (Nutt.) Nesom	ASTERACEAE	GOLDENBUSH	native	
Ericameria teretifolia (Durand & Hilg.) Jeps.	ASTERACEAE		native	
Erigeron acris L.	ASTERACEAE		native	
Erigeron acris L. var. kamtschaticus (DC.) Herder	ASTERACEAE		native	
Erigeron aequifolius H. M. Hall	ASTERACEAE	HALL'S DAISY	native	
Erigeron algidus Jeps.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron aliceae Howell	ASTERACEAE	FLEABANE DAISY	native	
Erigeron annuus (L.) Pers.	ASTERACEAE	FLEABANE DAISY	naturalized	
Erigeron aphanactis (A. Gray) Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron aphanactis (A. Gray) Greene var. aphanactis	ASTERACEAE	FLEABANE DAISY	native	
Erigeron aphanactis (A. Gray) Greene var. congestus (Greene) Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron argentatus A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron barbellulatus Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron biolettii Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron blochmaniae Greene	ASTERACEAE	BLOCHMAN'S LEAFY DAISY	native	
Erigeron bloomeri A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron bloomeri A. Gray var. bloomeri	ASTERACEAE	FLEABANE DAISY	native	
Erigeron bloomeri A. Gray var. nudatus (A. Gray) Cronquist	ASTERACEAE	WALDO DAISY	native	
Erigeron breweri A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron breweri A. Gray var. bisanctus G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron breweri A. Gray var. breweri	ASTERACEAE	FLEABANE DAISY	native	
Erigeron breweri A. Gray var. covillei (Greene) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron breweri A. Gray var. jacinteus (H. M. Hall) Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron breweri A. Gray var. porphyreticus (M. E. Jones) Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron calvus Coville	ASTERACEAE	BALD DAISY	native	
Erigeron cervinus Greene	ASTERACEAE	SISKIYOU DAISY	native	
Erigeron chrysopsidis A. Gray	ASTERACEAE		native	
Erigeron chrysopsidis A. Gray var. austiniae (Greene) G. L. Nesom	ASTERACEAE		native	
Erigeron clokeyi Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron clokeyi Cronquist var. pinzliae G. L. Nesom	ASTERACEAE		native	
Erigeron compactus S. F. Blake	ASTERACEAE	FLEABANE DAISY	native	
Erigeron compositus Pursh	ASTERACEAE	FLEABANE DAISY	native	
Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray var. concinnus	ASTERACEAE	FLEABANE DAISY	native	
Erigeron concinnus (Hook. & Arn.) Torr. & A. Gray var. condensatus D. C. Eaton	ASTERACEAE	FLEABANE DAISY	native	
Erigeron coulteri Porter	ASTERACEAE	FLEABANE DAISY	native	
Erigeron divergens Torr. & A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron eatonii A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron eatonii A. Gray var. nevadincola (S. F. Blake) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron eatonii A. Gray var. plantagineus (Greene) Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron eatonii A. Gray var. sonnei (Greene) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron elegantulus Greene	ASTERACEAE	VOLCANIC DAISY	native	
Erigeron elmeri (Greene) Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron filifolius Nutt.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt. var. confinis (Howell) Jeps.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt. var. foliosus	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt. var. franciscensis G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt. var. hartwegii (Greene) Jeps.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron foliosus Nutt. var. mendocinus (Greene) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron glacialis (Nutt.) A. Nelson	ASTERACEAE		native	
Erigeron glacialis (Nutt.) A. Nelson var. glacialis	ASTERACEAE		native	
Erigeron glacialis (Nutt.) A. Nelson var. hirsutus (Cronquist) G. L. Nesom	ASTERACEAE		native	
Erigeron glaucus Ker Gawl.	ASTERACEAE	SEASIDE DAISY	native	
Erigeron greenei G. L. Nesom	ASTERACEAE		native	
Erigeron inornatus (A. Gray) A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron inornatus (A. Gray) A. Gray var. calidipetris G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron inornatus (A. Gray) A. Gray var. inornatus	ASTERACEAE	FLEABANE DAISY	native	
Erigeron inornatus (A. Gray) A. Gray var. keilii G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron karvinskianus DC.	ASTERACEAE	FLEABANE DAISY	naturalized	
Erigeron klamathensis (G. L. Nesom) G. L. Nesom	ASTERACEAE		native	
Erigeron lassenianus Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron lassenianus Greene var. deficiens Cronquist	ASTERACEAE	FLEABANE DAISY	native	
Erigeron lassenianus Greene var. lassenianus	ASTERACEAE	FLEABANE DAISY	native	
Erigeron linearis (Hook.) Piper	ASTERACEAE	FLEABANE DAISY	native	
Erigeron lobatus A. Nelson	ASTERACEAE	FLEABANE DAISY	native	
Erigeron lonchophyllus Hook.	ASTERACEAE		native	
Erigeron maniopotamicus G. L. Nesom & T. W. Nelson	ASTERACEAE		native	
Erigeron mariposanus Congdon	ASTERACEAE	FLEABANE DAISY	native	
Erigeron miser A. Gray	ASTERACEAE	STARVED DAISY	native	
Erigeron multiceps Greene	ASTERACEAE	KERN RIVER DAISY	native	
Erigeron nivalis Nutt.	ASTERACEAE		native	
Erigeron parishii A. Gray	ASTERACEAE	PARISH'S DAISY	native	
Erigeron petrophilus Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron petrophilus Greene var. petrophilus	ASTERACEAE	FLEABANE DAISY	native	
Erigeron petrophilus Greene var. sierrensis G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron petrophilus Greene var. viscidulus (A. Gray) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron philadelphicus L.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron philadelphicus L. var. philadelphicus	ASTERACEAE		native	
Erigeron pumilus Nutt.	ASTERACEAE	FLEABANE DAISY	native	
Erigeron pumilus Nutt. var. gracilior Cronquist	ASTERACEAE		native	
Erigeron pumilus Nutt. var. intermedius (Cronquist) S. L. Welsh	ASTERACEAE	FLEABANE DAISY	native	
Erigeron pygmaeus (A. Gray) Greene	ASTERACEAE	FLEABANE DAISY	native	
Erigeron reductus (Cronquist) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron reductus (Cronquist) G. L. Nesom var. angustatus (A. Gray) G. L. Nesom	ASTERACEAE	FLEABANE DAISY	native	
Erigeron reductus (Cronquist) G. L. Nesom var. reductus	ASTERACEAE	CALIFORNIA RAYLESS DAISY	native	
Erigeron robustior (Cronquist) G. L. Nesom	ASTERACEAE		native	
Erigeron sanctarum S. Watson	ASTERACEAE	SAINTS' DAISY	native	
Erigeron serpentinus G. L. Nesom	ASTERACEAE	SERPENTINE DAISY	native	
Erigeron strigosus Willd.	ASTERACEAE	FLEABANE DAISY	naturalized	
Erigeron supplex A. Gray	ASTERACEAE	SUPPLE DAISY	native	
Erigeron tener (A. Gray) A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron uncialis S. F. Blake	ASTERACEAE	FLEABANE DAISY	native	
Erigeron uncialis S. F. Blake var. uncialis	ASTERACEAE	LIMESTONE DAISY	native	
Erigeron utahensis A. Gray	ASTERACEAE	FLEABANE DAISY	native	
Erigeron vagus Payson	ASTERACEAE	FLEABANE DAISY	native	
Eriobotrya japonica (Thunb.) Lindl.	ROSACEAE		naturalized	acceptance uncertain
Eriochloa acuminata (C. Presl) Hitchc. var. acuminata	POACEAE		native	
Eriochloa acuminata (J. Presl) Kunth	POACEAE		native	
Eriochloa aristata Vasey	POACEAE		native	
Eriochloa aristata Vasey var. aristata	POACEAE	AWNED CUP GRASS	native	acceptance uncertain
Eriochloa contracta Hitchc.	POACEAE		naturalized	
Eriodictyon altissimum P. V. Wells	BORAGINACEAE	INDIAN KNOB MOUNTAINBALM	native	
Eriodictyon angustifolium Nutt.	BORAGINACEAE	NARROW-LEAVED YERBA SANTA	native	
Eriodictyon californicum (Hook. & Arn.) Torr.	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon capitatum Eastw.	BORAGINACEAE	LOMPOC YERBA SANTA	native	
Eriodictyon crassifolium Benth.	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon crassifolium Benth. var. crassifolium	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon crassifolium Benth. var. nigrescens Brand	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon tomentosum Benth.	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon traskiae Eastw.	BORAGINACEAE	TRASK'S YERBA SANTA	native	
Eriodictyon trichocalyx A. Heller	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon trichocalyx A. Heller var. lanatum (Brand) Jeps.	BORAGINACEAE	YERBA SANTA	native	
Eriodictyon trichocalyx A. Heller var. trichocalyx	BORAGINACEAE	YERBA SANTA	native	
Eriogonum alpinum Engelm.	POLYGONACEAE	TRINITY BUCKWHEAT	native	
Eriogonum ampullaceum J. T. Howell	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum angulosum Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum apiculatum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum apiculatum S. Watson var. apiculatum	POLYGONACEAE		native	
Eriogonum apricum J. T. Howell	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum apricum J. T. Howell var. apricum	POLYGONACEAE	IONE BUCKWHEAT	native	
Eriogonum apricum J. T. Howell var. prostratum Myatt	POLYGONACEAE	IRISH HILL BUCKWHEAT	native	
Eriogonum arborescens Greene	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum argillosum J. T. Howell	POLYGONACEAE	CLAY-LOVING BUCKWHEAT	native	
Eriogonum baileyi S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum baileyi S. Watson var. baileyi	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum baileyi S. Watson var. praebens (Gand.) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum bifurcatum Reveal	POLYGONACEAE	FORKED BUCKWHEAT	native	
Eriogonum brachyanthum Coville	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum brachypodum Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum breedlovei (J. T. Howell) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum breedlovei (J. T. Howell) Reveal var. breedlovei	POLYGONACEAE	BREEDLOVE'S BUCKWHEAT	native	
Eriogonum breedlovei (J. T. Howell) Reveal var. shevockii J. T. Howell	POLYGONACEAE	THE NEEDLES BUCKWHEAT	native	
Eriogonum butterworthianum J. T. Howell	POLYGONACEAE	BUTTERWORTH'S BUCKWHEAT	native	
Eriogonum caespitosum Nutt.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum callistum Reveal	POLYGONACEAE		native	
Eriogonum cedrorum Reveal & Raiche	POLYGONACEAE		native	
Eriogonum cernuum Nutt.	POLYGONACEAE	NODDING BUCKWHEAT	native	
Eriogonum cinereum Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum cithariforme S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum cithariforme S. Watson var. agninum (Greene) Reveal	POLYGONACEAE		native	
Eriogonum cithariforme S. Watson var. cithariforme	POLYGONACEAE		native	
Eriogonum clavatum Small	POLYGONACEAE		native	
Eriogonum collinum S. Stokes ex M. E. Jones	POLYGONACEAE		native	
Eriogonum compositum Douglas ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum compositum Douglas ex Benth. var. compositum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum congdonii (S. Stokes) Reveal	POLYGONACEAE	CONGDON'S BUCKWHEAT	native	
Eriogonum contiguum (Reveal) Reveal	POLYGONACEAE	ANNUAL DESERT TRUMPET	native	
Eriogonum covilleanum Eastw.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum crocatum Davidson	POLYGONACEAE	CONEJO BUCKWHEAT	native	
Eriogonum crosbyae Reveal	POLYGONACEAE		native	
Eriogonum dasyanthemum Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum davidsonii Greene	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum deflexum Torr.	POLYGONACEAE	FLAT-TOPPED BUCKWHEAT	native	
Eriogonum deflexum Torr. var. baratum (Elmer) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum deflexum Torr. var. deflexum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum deflexum Torr. var. nevadense Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum deserticola S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum diclinum Reveal	POLYGONACEAE	JAYNE'S CANYON BUCKWHEAT	native	
Eriogonum douglasii Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum douglasii Benth. var. meridionale Reveal	POLYGONACEAE		native	
Eriogonum eastwoodianum J. T. Howell	POLYGONACEAE	EASTWOOD'S BUCKWHEAT	native	
Eriogonum elatum Douglas ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum elatum Douglas ex Benth. var. elatum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum elatum Douglas ex Benth. var. villosum Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum elegans Greene	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum elongatum Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum elongatum Benth. var. elongatum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum eremicola J. T. Howell & Reveal	POLYGONACEAE	WILD ROSE CANYON BUCKWHEAT	native	
Eriogonum esmeraldense S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum esmeraldense S. Watson var. esmeraldense	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum evanidum Reveal	POLYGONACEAE		native	
Eriogonum exaltatum M. E. Jones	POLYGONACEAE		native	
Eriogonum fasciculatum Benth.	POLYGONACEAE	CALIFORNIA BUCKWHEAT	native	
Eriogonum fasciculatum Benth. var. fasciculatum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum fasciculatum Benth. var. flavoviride Munz & I. M. Johnst.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum fasciculatum Benth. var. foliolosum (Nutt.) S. Stokes ex Abrams	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum fasciculatum Benth. var. polifolium (Benth.) Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum giganteum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum giganteum S. Watson var. compactum Dunkle	POLYGONACEAE	SANTA BARBARA ISLAND BUCKWHEAT	native	
Eriogonum giganteum S. Watson var. formosum K. Brandegee	POLYGONACEAE	SAN CLEMENTE ISLAND BUCKWHEAT	native	
Eriogonum giganteum S. Watson var. giganteum	POLYGONACEAE	SANTA CATALINA ISLAND BUCKWHEAT	native	
Eriogonum gilmanii S. Stokes	POLYGONACEAE	GILMAN'S BUCKWHEAT	native	
Eriogonum glandulosum (Nutt.) Nutt. ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum gossypinum Curran	POLYGONACEAE	COTTONY BUCKWHEAT	native	
Eriogonum gracile Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum gracile Benth. var. gracile	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum gracile Benth. var. incultum Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum gracilipes S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum gracillimum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum grande Greene	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum grande Greene var. grande	POLYGONACEAE	ISLAND BUCKWHEAT	native	
Eriogonum grande Greene var. rubescens (Greene) Munz	POLYGONACEAE	SAN MIGUEL ISLAND BUCKWHEAT	native	
Eriogonum grande Greene var. timorum Reveal	POLYGONACEAE	SAN NICOLAS ISLAND BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. argense (M. E. Jones) Munz	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. floccosum Munz	POLYGONACEAE	CLARK MOUNTAIN BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. heermannii	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. humilius (S. Stokes) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. occidentale S. Stokes	POLYGONACEAE	WESTERN HEERMANN'S BUCKWHEAT	native	
Eriogonum heermannii Durand & Hilg. var. sulcatum (S. Watson) Munz & Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heracleoides Nutt.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum heracleoides Nutt. var. heracleoides	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum hirtellum J. T. Howell & Bacig.	POLYGONACEAE	KLAMATH MOUNTAIN BUCKWHEAT	native	
Eriogonum hirtiflorum A. Gray ex S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum hoffmannii S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum hoffmannii S. Stokes var. hoffmannii	POLYGONACEAE	HOFFMANN'S BUCKWHEAT	native	
Eriogonum hoffmannii S. Stokes var. robustius S. Stokes	POLYGONACEAE	ROBUST HOFFMANN'S BUCKWHEAT	native	
Eriogonum hookeri S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum incanum Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum inerme (S. Watson) Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum inerme (S. Watson) Jeps. var. hispidulum Goodman	POLYGONACEAE		native	
Eriogonum inerme (S. Watson) Jeps. var. inerme	POLYGONACEAE		native	
Eriogonum inflatum Torr. & Frém.	POLYGONACEAE	DESERT TRUMPET	native	
Eriogonum intrafractum Coville & C. V. Morton	POLYGONACEAE	JOINTED BUCKWHEAT	native	
Eriogonum kelloggii A. Gray	POLYGONACEAE	KELLOGG'S BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson var. alpigenum (Munz & I. M. Johnst.) Munz & I. M. Johnst.	POLYGONACEAE	SOUTHERN ALPINE BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson var. austromontanum Munz & I. M. Johnst.	POLYGONACEAE	SOUTHERN MOUNTAIN BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson var. kennedyi	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson var. pinicola Reveal	POLYGONACEAE	KERN BUCKWHEAT	native	
Eriogonum kennedyi Porter ex S. Watson var. purpusii (Brandegee) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum latens Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum latifolium Sm.	POLYGONACEAE	COAST BUCKWHEAT	native	
Eriogonum libertini Reveal	POLYGONACEAE	DUBAKELLA MOUNTAIN BUCKWHEAT	native	
Eriogonum lobbii Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum luteolum Greene	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum luteolum Greene var. caninum (Greene) Reveal	POLYGONACEAE	TIBURON BUCKWHEAT	native	
Eriogonum luteolum Greene var. luteolum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum luteolum Greene var. pedunculatum (S. Stokes) Reveal	POLYGONACEAE		native	
Eriogonum luteolum Greene var. saltuarium Reveal	POLYGONACEAE		native	
Eriogonum maculatum A. Heller	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum marifolium Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum marifolium Torr. & A. Gray var. cupulatum (S. Stokes) Reveal	POLYGONACEAE		native	
Eriogonum marifolium Torr. & A. Gray var. marifolium	POLYGONACEAE		native	
Eriogonum mensicola S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum microthecum Nutt.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. alpinum Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. ambiguum (M. E. Jones) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. corymbosoides Reveal	POLYGONACEAE	SAN BERNARDINO BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. johnstonii Reveal	POLYGONACEAE	JOHNSTON'S BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. lacus-ursi Reveal & A. Sanders	POLYGONACEAE		native	
Eriogonum microthecum Nutt. var. lapidicola Reveal	POLYGONACEAE	INYO MOUNTAINS BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. laxiflorum Hook.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. panamintense S. Stokes	POLYGONACEAE	PANAMINT MOUNTAINS BUCKWHEAT	native	
Eriogonum microthecum Nutt. var. schoolcraftii Reveal	POLYGONACEAE		native	
Eriogonum microthecum Nutt. var. simpsonii (Benth.) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum mohavense S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum molestum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nervulosum (S. Stokes) Reveal	POLYGONACEAE	SNOW MOUNTAIN BUCKWHEAT	native	
Eriogonum nidularium Coville	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nortonii Greene	POLYGONACEAE	PINNACLES BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. auriculatum (Benth.) J. P. Tracy ex Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. decurrens (S. Stokes) M. L. Bowerman	POLYGONACEAE	BEN LOMOND BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. deductum (Greene) Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. indictum (Jeps.) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. murinum Reveal	POLYGONACEAE	MOUSE BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. nudum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. oblongifolium S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. paralinum Reveal	POLYGONACEAE	DEL NORTE BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. pauciflorum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. psychicola Reveal [see Correspondence 3]	POLYGONACEAE		native	
Eriogonum nudum Douglas ex Benth. var. pubiflorum Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. regirivum Reveal & J. C. Stebbins	POLYGONACEAE	KINGS RIVER BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. scapigerum (Eastw.) Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nudum Douglas ex Benth. var. westonii (S. Stokes) J. T. Howell	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nummulare M. E. Jones	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum nutans Torr. & A. Gray	POLYGONACEAE	NODDING BUCKWHEAT	native	
Eriogonum nutans Torr. & A. Gray var. nutans	POLYGONACEAE		native	
Eriogonum ochrocephalum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ochrocephalum S. Watson var. ochrocephalum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ordii S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ovalifolium Nutt.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ovalifolium Nutt. var. caelestinum Reveal	POLYGONACEAE		native	
Eriogonum ovalifolium Nutt. var. depressum Blank.	POLYGONACEAE		native	
Eriogonum ovalifolium Nutt. var. eximium (Tidestr.) J. T. Howell	POLYGONACEAE	BROWN-MARGINED BUCKWHEAT	native	
Eriogonum ovalifolium Nutt. var. monarchense D. A. York	POLYGONACEAE		native	
Eriogonum ovalifolium Nutt. var. nivale (Canby ex Coville) M. E. Jones	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ovalifolium Nutt. var. ovalifolium	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ovalifolium Nutt. var. purpureum (Nutt.) Durand	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ovalifolium Nutt. var. vineum (Small) A. Nelson	POLYGONACEAE	CUSHENBURY BUCKWHEAT	native	
Eriogonum palmerianum Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum panamintense C. V. Morton	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum parishii S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum parvifolium Sm.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum pendulum S. Watson	POLYGONACEAE	WALDO BUCKWHEAT	native	
Eriogonum plumatella Durand & Hilg.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum polypodum Small	POLYGONACEAE	TULARE COUNTY BUCKWHEAT	native	
Eriogonum prattenianum Durand	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum prattenianum Durand var. avium Reveal & Shevock	POLYGONACEAE	KETTLE DOME BUCKWHEAT	native	
Eriogonum prattenianum Durand var. prattenianum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum prociduum Reveal	POLYGONACEAE	PROSTRATE BUCKWHEAT	native	
Eriogonum prociduum Reveal var. prociduum	POLYGONACEAE		native	
Eriogonum pusillum Torr. & A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum pyrolifolium Hook.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum pyrolifolium Hook. var. coryphaeum Torr. & A. Gray	POLYGONACEAE		native	
Eriogonum pyrolifolium Hook. var. pyrolifolium	POLYGONACEAE		native	
Eriogonum reniforme Torr. & Frém.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum rixfordii S. Stokes	POLYGONACEAE	RIXFORD'S BUCKWHEAT	native	
Eriogonum rosense A. Nelson & P. B. Kenn.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum rosense A. Nelson & P. B. Kenn. var. rosense	POLYGONACEAE		native	
Eriogonum roseum Durand & Hilg.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum rupinum Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum saxatile S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum shockleyi S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum siskiyouense Small	POLYGONACEAE	SISKIYOU BUCKWHEAT	native	
Eriogonum spectabile B. L. Corbin, Reveal, & R. Barron	POLYGONACEAE		native	
Eriogonum spergulinum A. Gray	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum spergulinum A. Gray var. pratense (S. Stokes) J. T. Howell	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum spergulinum A. Gray var. reddingianum (M. E. Jones) J. T. Howell	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum spergulinum A. Gray var. spergulinum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum sphaerocephalum Douglas ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum sphaerocephalum Douglas ex Benth. var. halimioides (Gand.) S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum sphaerocephalum Douglas ex Benth. var. sphaerocephalum	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum strictum Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum strictum Benth. var. anserinum (Greene) S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum strictum Benth. var. greenei (A. Gray) Reveal	POLYGONACEAE	GREENE'S BUCKWHEAT	native	
Eriogonum strictum Benth. var. proliferum (Torr. & A. Gray) C. L. Hitchc.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum temblorense J. T. Howell & Twisselm.	POLYGONACEAE	TEMBLOR BUCKWHEAT	native	
Eriogonum ternatum Howell	POLYGONACEAE	TERNATE BUCKWHEAT	native	
Eriogonum thomasii Torr.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum thornei (Reveal & Henr.) L. M. Shultz	POLYGONACEAE		native	
Eriogonum thurberi Torr.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum trichopes Torr.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum tripodum Greene	POLYGONACEAE	TRIPOD BUCKWHEAT	native	
Eriogonum truncatum Torr. & A. Gray	POLYGONACEAE	MOUNT DIABLO BUCKWHEAT	native	
Eriogonum twisselmannii (J. T. Howell) Reveal	POLYGONACEAE	TWISSELMANN'S BUCKWHEAT	native	
Eriogonum umbellatum Torr.	POLYGONACEAE	SULFUR FLOWER	native	
Eriogonum umbellatum Torr. var. ahartii Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. argus Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. bahiiforme (Torr. & A. Gray) Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. canifolium Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. chlorothamnus Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. covillei (Small) Munz & Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. dichrocephalum Gand.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. dumosum (Greene) Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. furcosum Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. glaberrimum (Gand.) Reveal	POLYGONACEAE	GREEN BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. goodmanii Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. humistratum Reveal	POLYGONACEAE	MOUNT EDDY BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. juniporinum Reveal	POLYGONACEAE	JUNIPER BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. lautum Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. minus I. M. Johnst.	POLYGONACEAE	ALPINE SULFUR-FLOWERED BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. modocense (Greene) S. Stokes	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. munzii Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. nelsoniorum Reveal	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. nevadense Gand.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. smallianum (A. Heller) S. Stokes	POLYGONACEAE		native	
Eriogonum umbellatum Torr. var. speciosum (Drew) S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. subaridum S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. torreyanum (A. Gray) M. E. Jones	POLYGONACEAE	DONNER PASS BUCKWHEAT	native	
Eriogonum umbellatum Torr. var. versicolor S. Stokes	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ursinum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum ursinum S. Watson var. erubescens Reveal & J. Knorr	POLYGONACEAE		native	
Eriogonum ursinum S. Watson var. ursinum	POLYGONACEAE		native	
Eriogonum vestitum J. T. Howell	POLYGONACEAE	IDRIA BUCKWHEAT	native	
Eriogonum vimineum Douglas ex Benth.	POLYGONACEAE	WICKER BUCKWHEAT	native	
Eriogonum viridescens A. Heller	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. membranaceum S. Stokes ex Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. nodosum (Small) Reveal	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. olanchense (J. T. Howell) Reveal	POLYGONACEAE	OLANCHA PEAK BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. subscaposum S. Watson	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. trachygonum (Torr. ex Benth.) Jeps.	POLYGONACEAE	WILD BUCKWHEAT	native	
Eriogonum wrightii Torr. ex Benth. var. wrightii	POLYGONACEAE	WILD BUCKWHEAT	native	
Erioneuron pilosum (Buckley) Nash	POACEAE	HAIRY ERIONEURON	native	
Erioneuron pulchellum (Kunth) Tateoka	POACEAE	FLUFF GRASS	native	
Eriophorum crinigerum (A. Gray) Beetle	CYPERACEAE		native	
Eriophorum gracile W. D. J. Koch	CYPERACEAE	COTTON GRASS	native	
Eriophyllum ambiguum (A. Gray) A. Gray	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum ambiguum (A. Gray) A. Gray var. ambiguum	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum ambiguum (A. Gray) A. Gray var. paleaceum (Brandegee) Ferris	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum confertiflorum (DC.) A. Gray	ASTERACEAE	GOLDEN-YARROW	native	
Eriophyllum confertiflorum (DC.) A. Gray var. confertiflorum	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum confertiflorum (DC.) A. Gray var. tanacetiflorum (Greene) Jeps.	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum congdonii Brandegee	ASTERACEAE	CONGDON'S WOOLLY SUNFLOWER	native	
Eriophyllum jepsonii Greene	ASTERACEAE	JEPSON'S WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. achilleoides (DC.) Jeps.	ASTERACEAE		native	
Eriophyllum lanatum (Pursh) J. Forbes var. arachnoideum (Fisch. & Avé-Lall.) Jeps.	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. croceum (Greene) Jeps.	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. grandiflorum (A. Gray) Jeps.	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. hallii Constance	ASTERACEAE	FORT TEJON WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. integrifolium (Hook.) Smiley	ASTERACEAE	OREGON SUNSHINE	native	
Eriophyllum lanatum (Pursh) J. Forbes var. lanceolatum (Howell) Jeps.	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanatum (Pursh) J. Forbes var. obovatum (Greene) H. M. Hall	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum lanosum (A. Gray) A. Gray	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum latilobum Rydb.	ASTERACEAE	SAN MATEO WOOLLY SUNFLOWER	native	
Eriophyllum mohavense (I. M. Johnst.) Jeps.	ASTERACEAE	BARSTOW WOOLLY SUNFLOWER	native	
Eriophyllum multicaule (DC.) A. Gray	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum nubigenum Greene ex A. Gray	ASTERACEAE	YOSEMITE WOOLLY SUNFLOWER	native	
Eriophyllum pringlei A. Gray	ASTERACEAE	WOOLLY SUNFLOWER	native	
Eriophyllum staechadifolium Lag.	ASTERACEAE	SEASIDE WOOLLY SUNFLOWER	native	
Eriophyllum wallacei (A. Gray) A. Gray	ASTERACEAE	WOOLLY SUNFLOWER	native	
Erodium botrys (Cav.) Bertol.	GERANIACEAE	FILAREE; STORKSBILL	naturalized	
Erodium brachycarpum (Godr.) Thell.	GERANIACEAE	FILAREE; STORKSBILL	naturalized	
Erodium cicutarium (L.) L'Hér. ex Aiton	GERANIACEAE	FILAREE; STORKSBILL	naturalized	
Erodium malacoides (L.) L'Hér. ex Aiton	GERANIACEAE	FILAREE; STORKSBILL	naturalized	
Erodium moschatum (L.) L'Hér. ex Aiton	GERANIACEAE	FILAREE; STORKSBILL	naturalized	
Erodium texanum A. Gray	GERANIACEAE	FILAREE; STORKSBILL	native	
Eruca vesicaria (L.) Cav.	BRASSICACEAE	GARDEN-ROCKET; SALAD-ROCKET	naturalized	
Eruca vesicaria (L.) Cav. subsp. sativa (Mill.) Thell.	BRASSICACEAE	GARDEN-ROCKET; SALAD-ROCKET	naturalized	
Erucastrum gallicum (Willd.) O. E. Schulz	BRASSICACEAE		naturalized	
Eryngium alismifolium Greene	APIACEAE		native	
Eryngium aristulatum Jeps.	APIACEAE		native	
Eryngium aristulatum Jeps. var. aristulatum	APIACEAE		native	
Eryngium aristulatum Jeps. var. hooveri M. Y. Sheikh	APIACEAE	HOOVER'S BUTTON-CELERY	native	
Eryngium aristulatum Jeps. var. parishii (J. M. Coult. & Rose) Mathias & Constance	APIACEAE	SAN DIEGO BUTTON-CELERY	native	
Eryngium armatum (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Eryngium articulatum Hook.	APIACEAE		native	
Eryngium castrense Jeps.	APIACEAE		native	
Eryngium constancei M. Y. Sheikh	APIACEAE	LOCH LOMOND BUTTON-CELERY	native	
Eryngium mathiasiae M. Y. Sheikh	APIACEAE	MATHIAS' BUTTON-CELERY	native	
Eryngium pendletonense K. L. Marsden & M. G. Simpson	APIACEAE		native	acceptance uncertain
Eryngium pinnatisectum Jeps.	APIACEAE	TUOLUMNE BUTTON-CELERY	native	
Eryngium racemosum Jeps.	APIACEAE	DELTA BUTTON-CELERY	native	
Eryngium spinosepalum Mathias	APIACEAE	SPINY-SEPALED BUTTON-CELERY	native	
Eryngium vaseyi J. M. Coult. & Rose	APIACEAE		native	
Erysimum ammophilum A. Heller	BRASSICACEAE	COAST WALLFLOWER	native	
Erysimum capitatum (Hook.) Greene	BRASSICACEAE	WESTERN WALLFLOWER	native	
Erysimum capitatum (Hook.) Greene var. angustatum (Greene) Rossbach	BRASSICACEAE	CONTRA COSTA WALLFLOWER	native	
Erysimum capitatum (Hook.) Greene var. capitatum	BRASSICACEAE	WALLFLOWER	native	
Erysimum capitatum (Hook.) Greene var. lompocense (Rossbach) Kartesz	BRASSICACEAE	SAN LUIS OBISPO WALLFLOWER	native	
Erysimum capitatum (Hook.) Greene var. perenne (Coville) R. J. Davis	BRASSICACEAE	WALLFLOWER	native	
Erysimum cheiranthoides L.	BRASSICACEAE	WORMSEED MUSTARD	naturalized	
Erysimum cheiri (L.) Crantz	BRASSICACEAE	WALLFLOWER	naturalized	
Erysimum franciscanum Rossbach	BRASSICACEAE	SAN FRANCISCO WALLFLOWER	native	
Erysimum insulare Greene	BRASSICACEAE	WALLFLOWER	native	
Erysimum insulare Greene subsp. insulare	BRASSICACEAE	ISLAND WALLFLOWER	native	
Erysimum menziesii (Hook.) Wettst.	BRASSICACEAE	WALLFLOWER	native	
Erysimum repandum L.	BRASSICACEAE	WALLFLOWER	naturalized	
Erysimum teretifolium Eastw.	BRASSICACEAE	SANTA CRUZ WALLFLOWER	native	
Erythronium californicum Purdy	LILIACEAE	FAWN LILY	native	
Erythronium citrinum S. Watson	LILIACEAE	LEMON-COLORED FAWN LILY	native	
Erythronium citrinum S. Watson var. citrinum	LILIACEAE		native	
Erythronium citrinum S. Watson var. roderickii Shevock & G. A. Allen	LILIACEAE		native	
Erythronium grandiflorum Pursh	LILIACEAE	GLACIER LILY	native	
Erythronium helenae Applegate	LILIACEAE	FAWN LILY	native	
Erythronium hendersonii S. Watson	LILIACEAE	HENDERSON'S FAWN LILY	native	
Erythronium klamathense Applegate	LILIACEAE	KLAMATH FAWN LILY	native	
Erythronium multiscapideum (Kellogg) A. Nelson & P. B. Kenn.	LILIACEAE	FAWN LILY	native	
Erythronium oregonum Applegate	LILIACEAE	FAWN LILY	native	
Erythronium pluriflorum Shevock, Bartel & G. A. Allen	LILIACEAE	FAWN LILY	native	
Erythronium purpurascens S. Watson	LILIACEAE	FAWN LILY	native	
Erythronium pusaterii (Munz & J. T. Howell) Shevock, Bartel & G. A. Allen	LILIACEAE	KAWEAH LAKES FAWN LILY	native	
Erythronium revolutum Sm.	LILIACEAE	FAWN LILY	native	
Erythronium taylorii Shevock & G. A. Allen	LILIACEAE		native	acceptance uncertain
Erythronium tuolumnense Applegate	LILIACEAE	TUOLUMNE FAWN LILY	native	
Eschscholzia caespitosa Benth.	PAPAVERACEAE		native	
Eschscholzia californica Cham.	PAPAVERACEAE	CALIFORNIA POPPY	native	
Eschscholzia glyptosperma Greene	PAPAVERACEAE		native	
Eschscholzia hypecoides Benth.	PAPAVERACEAE	SAN BENITO POPPY	native	
Eschscholzia lemmonii Greene	PAPAVERACEAE		native	
Eschscholzia lemmonii Greene subsp. kernensis (Munz) C. Clark	PAPAVERACEAE	TEJON POPPY	native	
Eschscholzia lemmonii Greene subsp. lemmonii	PAPAVERACEAE		native	
Eschscholzia lobbii Greene	PAPAVERACEAE	FRYING PANS	native	
Eschscholzia minutiflora S. Watson	PAPAVERACEAE		native	
Eschscholzia parishii Greene	PAPAVERACEAE		native	
Eschscholzia ramosa (Greene) Greene	PAPAVERACEAE	ISLAND POPPY	native	
Eschscholzia rhombipetala Greene	PAPAVERACEAE	DIAMOND-PETALED CALIFORNIA POPPY	native	
Eucalyptus camaldulensis Dehnh.	MYRTACEAE	RED GUM; RIVER RED GUM	naturalized	
Eucalyptus citriodora Hook.	MYRTACEAE	LEMON-SCENTED GUM	naturalized	
Eucalyptus cladocalyx F. Muell.	MYRTACEAE	SUGAR GUM	naturalized	
Eucalyptus conferruminata D. J. Carr & S. G. M. Carr	MYRTACEAE		naturalized	
Eucalyptus globulus Labill.	MYRTACEAE	BLUE GUM	naturalized	
Eucalyptus polyanthemos Schauer	MYRTACEAE	RED BOX; SILVER DOLLAR GUM	naturalized	
Eucalyptus pulchella Desf.	MYRTACEAE		naturalized	
Eucalyptus sideroxylon A. Cunn. ex Woolls	MYRTACEAE	RED IRON BARK	naturalized	
Eucalyptus tereticornis Sm.	MYRTACEAE	FOREST RED GUM	naturalized	
Eucalyptus viminalis Labill.	MYRTACEAE	MANNA GUM	naturalized	
Eucephalus breweri (A. Gray) G. L. Nesom	ASTERACEAE		native	
Eucephalus engelmannii (D. C. Eaton) Greene	ASTERACEAE		native	
Eucephalus glabratus (Greene) Greene	ASTERACEAE		native	
Eucephalus ledophyllus (A. Gray) Greene	ASTERACEAE		native	
Eucephalus ledophyllus (A. Gray) Greene var. covillei (Greene) G.L. Nesom	ASTERACEAE		native	
Eucephalus tomentellus (Greene) Greene	ASTERACEAE		native	
Eucephalus vialis Bradshaw	ASTERACEAE		native	
Euchiton gymnocephalus (DC.) Holub	ASTERACEAE		naturalized	acceptance uncertain
Euchiton involucratus (G. Forst.) Holub	ASTERACEAE		naturalized	acceptance uncertain
Euchiton sphaericus (Willd.) Holub	ASTERACEAE		naturalized	acceptance uncertain
Euclidium syriacum (L.) W. T. Aiton	BRASSICACEAE		naturalized	
Eucnide rupestris (Baill.) H. J. Thomps. & W. R. Ernst	LOASACEAE	ROCK NETTLE	native	
Eucnide urens (A. Gray) Parry	LOASACEAE	ROCK NETTLE	native	
Eucrypta chrysanthemifolia (Benth.) Greene	BORAGINACEAE		native	
Eucrypta chrysanthemifolia (Benth.) Greene var. bipinnatifida (Torr.) Constance	BORAGINACEAE		native	
Eucrypta chrysanthemifolia (Benth.) Greene var. chrysanthemifolia	BORAGINACEAE		native	
Eucrypta micrantha (Torr.) A. Heller	BORAGINACEAE		native	
Euonymus occidentalis Nutt. ex Torr.	CELASTRACEAE	WESTERN BURNING BUSH	native	
Euonymus occidentalis Nutt. ex Torr. var. occidentalis	CELASTRACEAE	BURNING BUSH	native	
Euonymus occidentalis Nutt. ex Torr. var. parishii (Trel.) Jeps.	CELASTRACEAE	BURNING BUSH	native	
Euphorbia crenulata Engelm.	EUPHORBIACEAE	CHINESE CAPS	native	
Euphorbia davidii Subils	EUPHORBIACEAE		naturalized	acceptance uncertain
Euphorbia dendroides L.	EUPHORBIACEAE		naturalized	
Euphorbia eriantha Benth.	EUPHORBIACEAE	BEETLE SPURGE	native	
Euphorbia esula L.	EUPHORBIACEAE	LEAFY SPURGE	naturalized	
Euphorbia exigua L.	EUPHORBIACEAE		naturalized	acceptance uncertain
Euphorbia exstipulata Engelm.	EUPHORBIACEAE	SPURGE	native	
Euphorbia exstipulata Engelm. var. exstipulata	EUPHORBIACEAE	CLARK MOUNTAIN SPURGE	native	
Euphorbia graminea Jacq.	EUPHORBIACEAE		naturalized	acceptance uncertain
Euphorbia helioscopia L.	EUPHORBIACEAE	WARTWEED	naturalized	
Euphorbia hirta L.	EUPHORBIACEAE		naturalized	
Euphorbia incisa Engelm.	EUPHORBIACEAE	MOJAVE SPURGE	native	
Euphorbia lathyris L.	EUPHORBIACEAE	CAPER SPURGE; GOPHER PLANT	naturalized	
Euphorbia misera Benth.	EUPHORBIACEAE	CLIFF SPURGE	native	
Euphorbia myrsinites L.	EUPHORBIACEAE		naturalized	acceptance uncertain
Euphorbia oblongata Griseb.	EUPHORBIACEAE	SPURGE	naturalized	
Euphorbia palmeri S. Watson	EUPHORBIACEAE	SPURGE	native	
Euphorbia peplus L.	EUPHORBIACEAE	PETTY SPURGE	naturalized	
Euphorbia rigida M. Bieb.	EUPHORBIACEAE		naturalized	acceptance uncertain
Euphorbia serrata L.	EUPHORBIACEAE	SAW-TOOTHED SPURGE	naturalized	
Euphorbia spathulata Lam.	EUPHORBIACEAE	SPURGE	native	
Euphorbia terracina L.	EUPHORBIACEAE		naturalized	
Eurybia integrifolia (Nutt.) G. L. Nesom	ASTERACEAE		native	
Eurybia merita (A. Nelson) G. L. Nesom	ASTERACEAE		native	
Eurybia radulina (A. Gray) G. L. Nesom	ASTERACEAE		native	
Eustoma exaltatum (L.) Salisb. ex G. Don	GENTIANACEAE	CATCHFLY GENTIAN	native	
Eustoma exaltatum (L.) Salisb. ex G. Don subsp. exaltatum	GENTIANACEAE		native	
Euthamia occidentalis Nutt.	ASTERACEAE	WESTERN GOLDENROD	native	
Fagonia laevis Standl.	ZYGOPHYLLACEAE		native	
Fagonia pachyacantha Rydb.	ZYGOPHYLLACEAE		native	
Fallopia baldschuanica (Regel) Holub	POLYGONACEAE		naturalized	
Fallopia convolvulus (L.) A. Löve	POLYGONACEAE		naturalized	
Fallopia japonica (Houtt.) Ronse Decr.	POLYGONACEAE		naturalized	
Fallopia sachalinensis (F. Schmidt) Ronse Decr.	POLYGONACEAE		naturalized	
Fallugia paradoxa (D. Don) Endl. ex Torr.	ROSACEAE	APACHE PLUME	native	
Fendlerella utahensis (S. Watson) A. Heller	PHILADELPHACEAE	YERBA DESIERTO	native	
Ferocactus cylindraceus (Engelm.) Orcutt	CACTACEAE	CALIFORNIA BARREL CACTUS	native	
Ferocactus cylindraceus (Engelm.) Orcutt var. lecontei (Engelm.) Bravo	CACTACEAE	BARREL CACTUS; VISNAGA	native	
Ferocactus viridescens (Torr. & A. Gray) Britton & Rose	CACTACEAE	COAST BARREL CACTUS	native	
Ferocactus viridescens (Torr. & A. Gray) Britton & Rose var. viridescens	CACTACEAE		native	
Festuca arundinacea Schreb.	POACEAE	TALL FESCUE	naturalized	acceptance uncertain
Festuca brachyphylla Schult. & Schult. f.	POACEAE	FESCUE	native	
Festuca brachyphylla Schult. & Schult. f. subsp. coloradensis Fred.	POACEAE	FESCUE	native	
Festuca californica Vasey	POACEAE	CALIFORNIA FESCUE	native	
Festuca californica Vasey subsp. californica	POACEAE		native	
Festuca californica Vasey subsp. hitchcockiana (E. B. Alexeev) Darbysh.	POACEAE		native	
Festuca californica Vasey subsp. parishii (Piper) Darbysh.	POACEAE		native	
Festuca elmeri Scribn. & Merr.	POACEAE	FESCUE	native	acceptance uncertain
Festuca idahoensis Elmer	POACEAE	BLUE BUNCHGRASS; IDAHO FESCUE	native	
Festuca kingii (S. Watson) Cassidy	POACEAE	FESCUE	native	
Festuca minutiflora Rydb.	POACEAE	FESCUE	native	
Festuca occidentalis Hook.	POACEAE	WESTERN FESCUE	native	
Festuca pratensis Huds.	POACEAE	MEADOW FESCUE	naturalized	acceptance uncertain
Festuca roemeri (Pavlick) E. B. Alexeev var. klamathensis B.L. Wilson	POACEAE		native	acceptance uncertain
Festuca roemeri (Pavlick) E. B. Alexeev var. roemeri	POACEAE		native	acceptance uncertain
Festuca rubra L.	POACEAE	RED FESCUE	native	
Festuca saximontana Rydb.	POACEAE	FESCUE	native	
Festuca saximontana Rydb. var. purpusiana (St.-Yves) Fred. & Pavlick	POACEAE	FESCUE	native	
Festuca sororia Piper	POACEAE		native	acceptance uncertain
Festuca subulata Trin.	POACEAE	BEARDED FESCUE	native	
Festuca subuliflora Scribn.	POACEAE	CRINKLE-AWN FESCUE	native	
Festuca trachyphylla (Hack.) Krajina	POACEAE	HARD FESCUE; SHEEP FESCUE	naturalized	
Festuca viridula Vasey	POACEAE	GREEN FESCUE; MOUNTAIN BUNCHGRASS	native	
Ficus palmata Forssk.	MORACEAE		naturalized	acceptance uncertain
Filago pyramidata L.	ASTERACEAE	COTTONROSE; FILZKRAUT	naturalized	
Filago pyramidata L. var. pyramidata	ASTERACEAE	COTTONROSE; FILZKRAUT	naturalized	
Fimbristylis autumnalis (L.) Roem. & Schult.	CYPERACEAE		naturalized	
Fimbristylis thermalis S. Watson	CYPERACEAE	HOT-SPRINGS FIMBRISTYLIS	native	
Fimbristylis vahlii (Lam.) Link	CYPERACEAE		native	
Flaveria trinervia (Spreng.) C. Mohr	ASTERACEAE		naturalized	
Floerkea proserpinacoides Willd.	LIMNANTHACEAE	FALSE MERMAID	native	
Foeniculum vulgare Mill.	APIACEAE	FENNEL	naturalized	
Forestiera pubescens Nutt.	OLEACEAE	DESERT OLIVE	native	
Fouquieria splendens Engelm.	FOUQUIERIACEAE	BOOJUM; CANDLEWOOD; OCOTILLO	native	
Fouquieria splendens Engelm. subsp. splendens	FOUQUIERIACEAE	OCOTILLO	native	
Fragaria chiloensis (L.) Mill.	ROSACEAE	BEACH STRAWBERRY	native	
Fragaria vesca L.	ROSACEAE	WOOD STRAWBERRY	native	
Fragaria virginiana Mill.	ROSACEAE	MOUNTAIN STRAWBERRY	native	
Frangula californica (Eschsch.) A. Gray	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. californica	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. crassifolia (Jeps.) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. cuspidata (Greene) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. occidentalis (Howell ex Greene) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. tomentella (Benth.) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula californica (Eschsch.) A. Gray subsp. ursina (Greene) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula purshiana (DC.) J. G. Cooper	RHAMNACEAE		native	
Frangula purshiana (DC.) J. G. Cooper subsp. annonifolia (Greene) Sawyer & S.W. Edwards	RHAMNACEAE		native	
Frangula purshiana (DC.) J. G. Cooper subsp. purshiana	RHAMNACEAE		native	
Frangula purshiana Cooper subsp. ultramafica Sawyer & S. W. Edwards	RHAMNACEAE		native	
Frangula rubra (Greene) Grubov	RHAMNACEAE		native	
Frangula rubra (Greene) Grubov subsp. modocensis (C. B. Wolf) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula rubra (Greene) Grubov subsp. obtusissima (Greene) Kartesz & Gandhi	RHAMNACEAE		native	
Frangula rubra (Greene) Grubov subsp. rubra	RHAMNACEAE		native	
Frangula rubra (Greene) Grubov subsp. yosemitana (C. B. Wolf) Kartesz & Gandhi	RHAMNACEAE		native	
Frankenia palmeri S. Watson	FRANKENIACEAE	PALMER'S FRANKENIA	native	
Frankenia salina (Molina) I. M. Johnst.	FRANKENIACEAE	ALKALI HEATH	native	
Fraxinus anomala S. Watson	OLEACEAE	SINGLE-LEAF ASH	native	
Fraxinus dipetala Hook. & Arn.	OLEACEAE	CALIFORNIA ASH	native	
Fraxinus jonesii Lingelsh.	OLEACEAE		native	acceptance uncertain
Fraxinus latifolia Benth.	OLEACEAE	OREGON ASH	native	
Fraxinus parryi Moran	OLEACEAE		native	acceptance uncertain
Fraxinus uhdei (Wenz.) Lingelsh.	OLEACEAE		naturalized	
Fraxinus velutina Torr.	OLEACEAE	VELVET ASH	native	
Fremontodendron californicum (Torr.) Coville	STERCULIACEAE	FLANNELBUSH; FREMONTIA	native	
Fremontodendron californicum (Torr.) Coville subsp. californicum	STERCULIACEAE	FLANNELBUSH; FREMONTIA	native	
Fremontodendron californicum (Torr.) Coville subsp. decumbens (R. M. Lloyd) Munz	STERCULIACEAE	PINE HILL FLANNELBUSH	native	
Fremontodendron mexicanum Davidson	STERCULIACEAE	MEXICAN FLANNELBUSH	native	
Fritillaria affinis (Schult. & Schult. f.) Sealy	LILIACEAE	CHECKER LILY	native	
Fritillaria agrestis Greene	LILIACEAE	STINKBELLS	native	
Fritillaria atropurpurea Nutt.	LILIACEAE	FRITILLARY	native	
Fritillaria biflora Lindl.	LILIACEAE	CHOCOLATE LILY; MISSION BELLS	native	
Fritillaria biflora Lindl. var. biflora	LILIACEAE	FRITILLARY	native	
Fritillaria biflora Lindl. var. ineziana Jeps.	LILIACEAE	FRITILLARY	native	
Fritillaria brandegeei Eastw.	LILIACEAE	GREENHORN FRITILLARY	native	
Fritillaria eastwoodiae MacFarl.	LILIACEAE	BUTTE COUNTY FRITILLARY	native	
Fritillaria falcata (Jeps.) D. E. Beetle	LILIACEAE	TALUS FRITILLARY	native	
Fritillaria gentneri Gilkey	LILIACEAE		native	acceptance uncertain
Fritillaria glauca Greene	LILIACEAE	FRITILLARY	native	
Fritillaria liliacea Lindl.	LILIACEAE	FRAGRANT FRITILLARY	native	
Fritillaria micrantha A. Heller	LILIACEAE	BROWN BELLS	native	
Fritillaria ojaiensis Davidson	LILIACEAE	OJAI FRITILLARY	native	
Fritillaria pinetorum Davidson	LILIACEAE	FRITILLARY	native	
Fritillaria pluriflora Benth.	LILIACEAE	ADOBE-LILY	native	
Fritillaria pudica (Pursh) Spreng.	LILIACEAE	YELLOW FRITILLARY	native	
Fritillaria purdyi Eastw.	LILIACEAE	PURDY'S FRITILLARY	native	
Fritillaria recurva Benth.	LILIACEAE	SCARLET FRITILLARY	native	
Fritillaria striata Eastw.	LILIACEAE	STRIPED ADOBE-LILY	native	
Fritillaria viridea Kellogg	LILIACEAE	SAN BENITO FRITILLARY	native	
Fuchsia hybrida Voss.	ONAGRACEAE		naturalized	acceptance uncertain
Fuchsia magellanica Lam.	ONAGRACEAE		naturalized	
Fumaria capreolata L.	PAPAVERACEAE		naturalized	
Fumaria officinalis L.	PAPAVERACEAE	FUMITORY	naturalized	
Fumaria parviflora Lam.	PAPAVERACEAE		naturalized	
Funastrum crispum (Benth.) Schltr.	APOCYNACEAE		native	
Funastrum cynanchoides (Decne.) Schltr.	APOCYNACEAE		native	
Funastrum cynanchoides (Decne.) Schltr. var. hartwegii (Vail) Krings	APOCYNACEAE		native	
Funastrum hirtellum (A. Gray) Schltr.	APOCYNACEAE		native	
Funastrum utahense (Engelm.) Liede & Meve	APOCYNACEAE		native	
Gaillardia aristata Pursh	ASTERACEAE	INDIAN-BLANKET	naturalized	
Gaillardia pulchella Foug.	ASTERACEAE	INDIAN-BLANKET	naturalized	
Galeopsis tetrahit L.	LAMIACEAE		naturalized	acceptance uncertain
Galinsoga parviflora Cav.	ASTERACEAE		naturalized	
Galinsoga parviflora Cav. var. parviflora	ASTERACEAE		naturalized	
Galium ambiguum W. Wight	RUBIACEAE	YOLLA BOLLY BEDSTRAW	native	
Galium ambiguum Wight var. ambiguum	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium ambiguum Wight var. siskiyouense Ferris	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium andrewsii A. Gray	RUBIACEAE	PHLOX-LEAVED BEDSTRAW	native	
Galium andrewsii A. Gray subsp. andrewsii	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium andrewsii A. Gray subsp. gatense (Dempster) Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium andrewsii A. Gray subsp. intermedium Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. angustifolium	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. borregoense Dempster & Stebbins	RUBIACEAE	BORREGO BEDSTRAW	native	
Galium angustifolium A. Gray subsp. foliosum (Hilend & J. T. Howell) Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. gabrielense (Munz & I. M. Johnst.) Dempster & Stebbins	RUBIACEAE	SAN ANTONIO CANYON BEDSTRAW	native	
Galium angustifolium A. Gray subsp. gracillimum Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. jacinticum Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. nudicaule Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium angustifolium A. Gray subsp. onycense (Dempster) Dempster & Stebbins	RUBIACEAE	ONYX PEAK BEDSTRAW	native	
Galium angustifolium Nutt. ex A. Gray	RUBIACEAE	NARROW-LEAVED BEDSTRAW	native	
Galium aparine L.	RUBIACEAE	GOOSE GRASS	native	
Galium argense Dempster & Ehrend.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium bifolium S. Watson	RUBIACEAE	LOW MOUNTAIN BEDSTRAW	native	
Galium bolanderi A. Gray	RUBIACEAE	BOLANDER'S BEDSTRAW	native	
Galium boreale L.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium boreale L. subsp. septentrionale (Roem. & Schult.) H. Hara	RUBIACEAE	NORTHERN BEDSTRAW	native	
Galium buxifolium Greene	RUBIACEAE	BOX BEDSTRAW	native	
Galium californicum Hook. & Arn.	RUBIACEAE	CALIFORNIA BEDSTRAW	native	
Galium californicum Hook. & Arn. subsp. californicum	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium californicum Hook. & Arn. subsp. flaccidum (Greene) Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium californicum Hook. & Arn. subsp. luciense Dempster & Stebbins	RUBIACEAE	CONE PEAK BEDSTRAW	native	
Galium californicum Hook. & Arn. subsp. maritimum Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium californicum Hook. & Arn. subsp. miguelense (Greene) Dempster & Stebbins	RUBIACEAE	SAN MIGUEL ISLAND BEDSTRAW	native	
Galium californicum Hook. & Arn. subsp. primum Dempster & Stebbins	RUBIACEAE	CALIFORNIA BEDSTRAW	native	
Galium californicum Hook. & Arn. subsp. sierrae Dempster & Stebbins	RUBIACEAE	ELDORADO BEDSTRAW	native	
Galium catalinense A. Gray	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium catalinense A. Gray subsp. acrispum Dempster	RUBIACEAE	SAN CLEMENTE ISLAND BEDSTRAW	native	
Galium catalinense A. Gray subsp. catalinense	RUBIACEAE	SANTA CATALINA BEDSTRAW	native	
Galium clementis Eastw.	RUBIACEAE	SANTA LUCIA BEDSTRAW	native	
Galium cliftonsmithii (Dempster) Dempster & Stebbins	RUBIACEAE	SANTA BARBARA BEDSTRAW	native	
Galium divaricatum Lam.	RUBIACEAE	LAMARCK'S BEDSTRAW	naturalized	
Galium glabrescens (Ehrend.) Dempster & Ehrend.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium glabrescens (Ehrend.) Dempster & Ehrend. subsp. glabrescens	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium glabrescens (Ehrend.) Dempster & Ehrend. subsp. modocense Dempster & Ehrend.	RUBIACEAE	MODOC BEDSTRAW	native	
Galium grande McClatchie	RUBIACEAE	SAN GABRIEL BEDSTRAW	native	
Galium grayanum Ehrend.	RUBIACEAE	GRAY'S BEDSTRAW	native	
Galium grayanum Ehrend. var. grayanum	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium grayanum Ehrend. var. nanum Dempster & Ehrend.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium hallii Munz & I. M. Johnst.	RUBIACEAE	NODDING BEDSTRAW	native	
Galium hardhamiae Dempster	RUBIACEAE	HARDHAM'S BEDSTRAW	native	
Galium hilendiae Dempster & Ehrend.	RUBIACEAE	HILEND'S BEDSTRAW	native	
Galium hilendiae Dempster & Ehrend. subsp. carneum (Hilend & J. T. Howell) Dempster & Ehrend.	RUBIACEAE	PANAMINT MOUNTAINS BEDSTRAW	native	
Galium hilendiae Dempster & Ehrend. subsp. hilendiae	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium hilendiae Dempster & Ehrend. subsp. kingstonense (Dempster) Dempster & Ehrend.	RUBIACEAE	KINGSTON MOUNTAIN BEDSTRAW	native	
Galium hypotrichium A. Gray	RUBIACEAE	ALPINE BEDSTRAW	native	
Galium hypotrichium A. Gray subsp. hypotrichium	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium hypotrichium A. Gray subsp. inyoense Dempster & Ehrend.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium hypotrichium A. Gray subsp. subalpinum (Hilend & J. T. Howell) Ehrend.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium hypotrichium A. Gray subsp. tomentellum Ehrend.	RUBIACEAE	TELESCOPE PEAK BEDSTRAW	native	
Galium jepsonii Hilend & J. T. Howell	RUBIACEAE	JEPSON'S BEDSTRAW	native	
Galium johnstonii Dempster & Stebbins	RUBIACEAE	JOHNSTON'S BEDSTRAW	native	
Galium magnifolium (Dempster) Dempster	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium matthewsii A. Gray	RUBIACEAE	MATTHEWS' BEDSTRAW	native	
Galium mexicanum Kunth	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium mexicanum Kunth var. asperulum (A. Gray) Dempster	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium mollugo L.	RUBIACEAE	HEDGE BEDSTRAW	naturalized	
Galium multiflorum Kellogg	RUBIACEAE	KELLOGG'S BEDSTRAW	native	
Galium munzii Hilend & J. T. Howell	RUBIACEAE	MUNZ'S BEDSTRAW	native	
Galium murale (L.) All.	RUBIACEAE	TINY BEDSTRAW	naturalized	
Galium muricatum W. Wight	RUBIACEAE	HUMBOLDT BEDSTRAW	native	
Galium nuttallii A. Gray	RUBIACEAE	SAN DIEGO BEDSTRAW	native	
Galium nuttallii A. Gray subsp. insulare Ferris	RUBIACEAE	NUTTALL'S ISLAND BEDSTRAW	native	
Galium nuttallii A. Gray subsp. nuttallii	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium oreganum Britton	RUBIACEAE	OREGON BEDSTRAW	native	
Galium parishii Hilend & J. T. Howell	RUBIACEAE	PARISH'S BEDSTRAW	native	
Galium parisiense L.	RUBIACEAE	WALL BEDSTRAW	naturalized	
Galium porrigens Dempster	RUBIACEAE	CLIMBING BEDSTRAW	native	
Galium porrigens Dempster var. porrigens	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium porrigens Dempster var. tenue (Dempster) Dempster	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium proliferum A. Gray	RUBIACEAE	DESERT BEDSTRAW	native	
Galium saxatile L.	RUBIACEAE	BEDSTRAW; CLEAVERS	naturalized	
Galium schultesii Vest	RUBIACEAE	BEDSTRAW; CLEAVERS	naturalized	
Galium serpenticum Dempster	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium serpenticum Dempster subsp. scotticum Dempster & Ehrend.	RUBIACEAE	SCOTT MOUNTAIN BEDSTRAW	native	
Galium serpenticum Dempster subsp. warnerense Dempster & Ehrend.	RUBIACEAE	WARNER MOUNTAINS BEDSTRAW	native	
Galium sparsiflorum W. Wight	RUBIACEAE	SEQUOIA BEDSTRAW	native	
Galium sparsiflorum W. Wight subsp. glabrius Dempster & Stebbins	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium sparsiflorum W. Wight subsp. sparsiflorum	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium stellatum Kellogg	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium stellatum Kellogg var. eremicum Hilend & J. T. Howell	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium tricornutum Dandy	RUBIACEAE	ROUGH CORN BEDSTRAW	native	
Galium trifidum L.	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium trifidum L. var. pacificum Wiegand	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium trifidum L. var. pusillum A. Gray	RUBIACEAE	BEDSTRAW; CLEAVERS	native	
Galium triflorum Michx.	RUBIACEAE	SWEET-SCENTED BEDSTRAW	native	
Galium verum L.	RUBIACEAE	LADIES' BEDSTRAW; YELLOW BEDSTRAW	naturalized	
Galium wrightii A. Gray	RUBIACEAE	WRIGHT'S BEDSTRAW	native	
Galvezia speciosa (Nutt.) A. Gray	SCROPHULARIACEAE	SHOWY ISLAND SNAPDRAGON	native	
Gamochaeta calviceps (Fernald) Cabrera	ASTERACEAE		naturalized	
Gamochaeta coarctata (Willd.) Kerg.	ASTERACEAE		naturalized	
Gamochaeta pensylvanica (Willd.) Cabrera	ASTERACEAE		naturalized	
Gamochaeta stachydifolia (Lam.) Cabrera	ASTERACEAE		naturalized	acceptance uncertain
Gamochaeta ustulata (Nutt.) G. L. Nesom	ASTERACEAE		native	
Garrya buxifolia A. Gray	GARRYACEAE	SILK TASSEL BUSH	native	
Garrya congdonii Eastw.	GARRYACEAE	SILK TASSEL BUSH	native	
Garrya elliptica Lindl.	GARRYACEAE	SILK TASSEL BUSH	native	
Garrya flavescens S. Watson	GARRYACEAE	SILK TASSEL BUSH	native	
Garrya fremontii Torr.	GARRYACEAE	SILK TASSEL BUSH	native	
Garrya veatchii Kellogg	GARRYACEAE	SILK TASSEL BUSH	native	
Gastridium ventricosum (Gouan) Schinz & Thell.	POACEAE	NIT GRASS	naturalized	
Gaudinia fragilis (L.) P. Beauv.	POACEAE		naturalized	
Gaultheria humifusa (Graham) Rydb.	ERICACEAE	ALPINE WINTERGREEN	native	
Gaultheria ovatifolia A. Gray	ERICACEAE		native	
Gaultheria shallon Pursh	ERICACEAE	SALAL	native	
Gaura coccinea Pursh	ONAGRACEAE	LINDA TARDE; WILD HONEYSUCKLE	native	
Gaura drummondii (Spach) Torr. & A. Gray	ONAGRACEAE		naturalized	
Gaura parviflora Douglas ex Lehm.	ONAGRACEAE	LIZARD-TAIL; VELVET WEED	naturalized	acceptance uncertain
Gaura sinuata Nutt. ex Ser.	ONAGRACEAE	WAVY-LEAVED GAURA	naturalized	
Gayophytum decipiens H. Lewis & Szweyk.	ONAGRACEAE		native	
Gayophytum diffusum Torr. & A. Gray	ONAGRACEAE		native	
Gayophytum diffusum Torr. & A. Gray subsp. diffusum	ONAGRACEAE		native	
Gayophytum diffusum Torr. & A. Gray subsp. parviflorum H. Lewis & Szweyk.	ONAGRACEAE		native	
Gayophytum eriospermum Coville	ONAGRACEAE		native	
Gayophytum heterozygum H. Lewis & Szweyk.	ONAGRACEAE		native	
Gayophytum humile A. Juss.	ONAGRACEAE		native	
Gayophytum oligospermum H. Lewis & Szweyk.	ONAGRACEAE		native	
Gayophytum racemosum Torr. & A. Gray	ONAGRACEAE		native	
Gayophytum ramosissimum Torr. & A. Gray	ONAGRACEAE		native	
Gazania linearis (Thunb.) Druce	ASTERACEAE		naturalized	
Genista canariensis L.	FABACEAE	BROOM	naturalized	
Genista linifolia L.	FABACEAE	BROOM	naturalized	
Genista monosperma (L.) Lam.	FABACEAE		naturalized	
Genista monspessulana (L.) L. A. S. Johnson	FABACEAE	BROOM	naturalized	
Gentiana affinis Griseb.	GENTIANACEAE	GENTIAN	native	
Gentiana affinis Griseb. var. ovata A. Gray	GENTIANACEAE	GENTIAN	native	
Gentiana calycosa Griseb.	GENTIANACEAE	GENTIAN	native	
Gentiana fremontii Torr.	GENTIANACEAE	MOSS GENTIAN	native	
Gentiana newberryi A. Gray	GENTIANACEAE	GENTIAN	native	
Gentiana newberryi A. Gray var. newberryi	GENTIANACEAE	GENTIAN	native	
Gentiana newberryi A. Gray var. tiogana (A. Heller) J. S. Pringle	GENTIANACEAE	GENTIAN	native	
Gentiana plurisetosa C. T. Mason	GENTIANACEAE	KLAMATH GENTIAN	native	
Gentiana prostrata Haenke	GENTIANACEAE	PIGMY GENTIAN	native	
Gentiana sceptrum Griseb.	GENTIANACEAE	GENTIAN	native	
Gentiana setigera A. Gray	GENTIANACEAE	MENDOCINO GENTIAN	native	
Gentianella amarella (L.) Börner	GENTIANACEAE		native	
Gentianella amarella (L.) Börner subsp. acuta (Michx.) J. M. Gillett	GENTIANACEAE		native	
Gentianopsis holopetala (A. Gray) H. H. Iltis	GENTIANACEAE	FRINGED GENTIAN	native	
Gentianopsis simplex (A. Gray) H. H. Iltis	GENTIANACEAE	FRINGED GENTIAN	native	
Geraea canescens Torr. & A. Gray	ASTERACEAE	DESERT-SUNFLOWER	native	
Geraea viscida (A. Gray) S. F. Blake	ASTERACEAE	STICKY GERAEA	native	
Geranium aequale (Bab.) Aedo	GERANIACEAE		naturalized	
Geranium bicknellii Britton	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geranium californicum G. N. Jones & F. L. Jones	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geranium carolinianum L.	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geranium columbinum L.	GERANIACEAE		naturalized	
Geranium core-core Steud.	GERANIACEAE		naturalized	
Geranium dissectum L.	GERANIACEAE	CRANESBILL; GERANIUM	naturalized	
Geranium lucidum L.	GERANIACEAE		naturalized	
Geranium molle L.	GERANIACEAE	CRANESBILL; GERANIUM	naturalized	
Geranium oreganum Howell	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geranium potentilloides L'Hér. ex DC.	GERANIACEAE	CRANESBILL; GERANIUM	naturalized	
Geranium purpureum Vill.	GERANIACEAE		naturalized	
Geranium pusillum L.	GERANIACEAE	CRANESBILL; GERANIUM	naturalized	
Geranium richardsonii Fisch. & Trautv.	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geranium robertianum L.	GERANIACEAE	CRANESBILL; GERANIUM	naturalized	
Geranium rotundifolium L.	GERANIACEAE		naturalized	
Geranium solanderi Carolin	GERANIACEAE		naturalized	
Geranium viscosissimum Fisch. & C. A. Mey.	GERANIACEAE	CRANESBILL; GERANIUM	native	
Geum aleppicum Jacq.	ROSACEAE		native	
Geum macrophyllum Willd.	ROSACEAE	BIGLEAF AVENS	native	
Geum triflorum Pursh	ROSACEAE	OLD MAN'S WHISKERS	native	
Gilia achilleifolia Benth.	POLEMONIACEAE		native	
Gilia achilleifolia Benth. subsp. achilleifolia	POLEMONIACEAE		native	
Gilia achilleifolia Benth. subsp. multicaulis (Benth.) V. E. Grant & A. D. Grant	POLEMONIACEAE		native	
Gilia aliquanta A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia aliquanta A. D. Grant & V. E. Grant subsp. aliquanta	POLEMONIACEAE		native	
Gilia aliquanta A. D. Grant & V. E. Grant subsp. breviloba A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia angelensis V. E. Grant	POLEMONIACEAE		native	
Gilia austro-occidentalis (A. D. Grant & V. E. Grant) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia brecciarum M. E. Jones	POLEMONIACEAE		native	
Gilia brecciarum M. E. Jones subsp. brecciarum	POLEMONIACEAE		native	
Gilia brecciarum M. E. Jones subsp. jacens (A. D. Grant & V. E. Grant) A. G. Day	POLEMONIACEAE		native	
Gilia brecciarum M. E. Jones subsp. neglecta A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller subsp. bernardina A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller subsp. cana	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller subsp. speciformis A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller subsp. speciosa (Jeps.) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia cana (M. E. Jones) A. Heller subsp. triceps (Brand) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims	POLEMONIACEAE		native	
Gilia capitata Sims subsp. abrotanifolia (Greene) V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims subsp. capitata	POLEMONIACEAE		native	
Gilia capitata Sims subsp. chamissonis (Greene) V. E. Grant	POLEMONIACEAE	DUNE GILIA	native	
Gilia capitata Sims subsp. mediomontana V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims subsp. pacifica V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims subsp. pedemontana V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims subsp. staminea (Greene) V. E. Grant	POLEMONIACEAE		native	
Gilia capitata Sims subsp. tomentosa (Brand) V. E. Grant	POLEMONIACEAE		native	
Gilia clivorum (Jeps.) V. E. Grant	POLEMONIACEAE		native	
Gilia clokeyi H. Mason	POLEMONIACEAE		native	
Gilia diegensis (Munz) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia inconspicua (Sm.) Sweet	POLEMONIACEAE		native	
Gilia interior (H. Mason & A. D. Grant) A. D. Grant	POLEMONIACEAE		native	
Gilia latiflora (A. Gray) A. Gray	POLEMONIACEAE	BROAD-FLOWERED GILIA	native	
Gilia latiflora (A. Gray) A. Gray subsp. cuyamensis A. D. Grant & V. E. Grant	POLEMONIACEAE	CUYAMA GILIA	native	
Gilia latiflora (A. Gray) A. Gray subsp. davyi (Milliken) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia latiflora (A. Gray) A. Gray subsp. elongata A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia latiflora (A. Gray) A. Gray subsp. latiflora	POLEMONIACEAE		native	
Gilia leptantha Parish	POLEMONIACEAE		native	
Gilia leptantha Parish subsp. leptantha	POLEMONIACEAE		native	
Gilia leptantha Parish subsp. pinetorum A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia leptantha Parish subsp. purpusii (Milliken) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia leptantha Parish subsp. transversa A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia malior A. G. Day & V. E. Grant	POLEMONIACEAE		native	
Gilia millefoliata Fisch. & C. A. Mey.	POLEMONIACEAE		native	
Gilia minor A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia modocensis Eastw.	POLEMONIACEAE		native	
Gilia nevinii A. Gray	POLEMONIACEAE	NEVIN'S GILIA	native	
Gilia ochroleuca M. E. Jones	POLEMONIACEAE		native	
Gilia ochroleuca M. E. Jones subsp. bizonata A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia ochroleuca M. E. Jones subsp. exilis (A. Gray) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia ochroleuca M. E. Jones subsp. ochroleuca	POLEMONIACEAE		native	
Gilia ochroleuca M. E. Jones subsp. vivida (A. D. Grant & V. E. Grant) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia ophthalmoides Brand	POLEMONIACEAE		native	
Gilia salticola Eastw.	POLEMONIACEAE		native	
Gilia scopulorum M. E. Jones	POLEMONIACEAE		native	
Gilia sinuata Benth.	POLEMONIACEAE		native	
Gilia stellata A. Heller	POLEMONIACEAE	STAR GILIA	native	
Gilia tenuiflora Benth.	POLEMONIACEAE		native	
Gilia tenuiflora Benth. subsp. amplifaucalis A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia tenuiflora Benth. subsp. arenaria (Benth.) A. D. Grant & V. E. Grant	POLEMONIACEAE	SAND GILIA	native	
Gilia tenuiflora Benth. subsp. hoffmannii (Eastw.) A. D. Grant & V. E. Grant	POLEMONIACEAE	HOFFMANN'S SLENDER-FLOWERED GILIA	native	
Gilia tenuiflora Benth. subsp. tenuiflora	POLEMONIACEAE		native	
Gilia transmontana (H. Mason & A. D. Grant) A. D. Grant & V. E. Grant	POLEMONIACEAE		native	
Gilia tricolor Benth.	POLEMONIACEAE	BIRD'S EYES	native	
Gilia tricolor Benth. subsp. diffusa (Congdon) H. Mason & A. D. Grant	POLEMONIACEAE		native	
Gilia tricolor Benth. subsp. tricolor	POLEMONIACEAE		native	
Gilia yorkii Shevock & A. G. Day	POLEMONIACEAE		native	acceptance uncertain
Gilmania luteola (Coville) Coville	POLYGONACEAE	GOLDEN CARPET	native	
Githopsis diffusa A. Gray	CAMPANULACEAE	BLUECUP	native	
Githopsis diffusa A. Gray subsp. candida (Ewan) Morin	CAMPANULACEAE	BLUECUP	native	
Githopsis diffusa A. Gray subsp. diffusa	CAMPANULACEAE	BLUECUP	native	
Githopsis diffusa A. Gray subsp. filicaulis (Ewan) Morin	CAMPANULACEAE	MISSION CANYON BLUECUP	native	
Githopsis diffusa A. Gray subsp. robusta Morin	CAMPANULACEAE	BLUECUP	native	
Githopsis pulchella Vatke	CAMPANULACEAE	BLUECUP	native	
Githopsis pulchella Vatke subsp. campestris Morin	CAMPANULACEAE	BLUECUP	native	
Githopsis pulchella Vatke subsp. pulchella	CAMPANULACEAE	BLUECUP	native	
Githopsis pulchella Vatke subsp. serpentinicola Morin	CAMPANULACEAE	BLUECUP	native	
Githopsis pulchella Vatke var. glabra (Jeps.) Morin	CAMPANULACEAE		native	
Githopsis pulchella Vatke var. pulchella	CAMPANULACEAE		native	
Githopsis specularioides Nutt.	CAMPANULACEAE	BLUECUP	native	
Githopsis tenella Morin	CAMPANULACEAE	BLUECUP	native	
Glaucium flavum Crantz	PAPAVERACEAE	SEA POPPY	naturalized	
Glaux maritima L.	MYRSINACEAE	SEA-MILKWORT	native	
Glebionis coronaria (L.) Spach	ASTERACEAE		naturalized	
Glebionis segetum (L.) Fourr.	ASTERACEAE		naturalized	
Glechoma hederacea L.	LAMIACEAE	GROUND IVY	naturalized	
Gleditsia triacanthos L.	FABACEAE		naturalized	
Glehnia littoralis F. Schmidt ex Miq.	APIACEAE		native	
Glehnia littoralis F. Schmidt ex Miq. subsp. leiocarpa (Mathias) Hultén	APIACEAE		native	
Glinus lotoides L.	MOLLUGINACEAE		naturalized	
Glinus radiatus (Ruiz & Pav.) Rohrb.	MOLLUGINACEAE		naturalized	
Glossopetalon pungens Brandegee	CROSSOSOMATACEAE	PUNGENT FORSELLESIA	native	
Glossopetalon spinescens A. Gray	CROSSOSOMATACEAE	NEVADA GREASEWOOD	native	
Glossopetalon spinescens A. Gray var. aridum M. E. Jones	CROSSOSOMATACEAE		native	
Glyceria borealis (Nash) Batch.	POACEAE	MANNAGRASS	native	
Glyceria davyi (Merr.) Tzvelev	POACEAE		native	acceptance uncertain
Glyceria elata (Nash ex Rydb.) M. E. Jones	POACEAE	FOWL MANNAGRASS	native	
Glyceria fluitans (L.) R. Br.	POACEAE		naturalized	
Glyceria grandis S. Watson	POACEAE	AMERICAN MANNAGRASS	native	
Glyceria leptostachya Buckley	POACEAE	MANNAGRASS	native	
Glyceria occidentalis (Piper) J. C. Nelson	POACEAE	MANNAGRASS	native	
Glyceria striata (Lam.) Hitchc.	POACEAE	MANNAGRASS	native	
Glycyrrhiza glabra L.	FABACEAE	LICORICE	naturalized	
Glycyrrhiza lepidota Pursh	FABACEAE	WILD LICORICE	native	
Glyptopleura marginata D. C. Eaton	ASTERACEAE		native	
Gnaphalium californicum DC.	ASTERACEAE	CUDWEED; EVERLASTING	native	
Gnaphalium leucocephalum A. Gray	ASTERACEAE	CUDWEED; EVERLASTING	native	
Gnaphalium luteoalbum L.	ASTERACEAE		naturalized	
Gnaphalium macounii Greene	ASTERACEAE		native	acceptance uncertain
Gnaphalium palustre Nutt.	ASTERACEAE	CUDWEED; EVERLASTING	native	
Gnaphalium ramosissimum Nutt.	ASTERACEAE	CUDWEED; EVERLASTING	native	
Gnaphalium stramineum Kunth	ASTERACEAE	CUDWEED; EVERLASTING	native	
Goodmania luteola (Parry) Reveal & Ertter	POLYGONACEAE		native	
Goodyera oblongifolia Raf.	ORCHIDACEAE	RATTLESNAKE PLANTAIN	native	
Gossypium hirsutum L.	MALVACEAE		naturalized	acceptance uncertain
Gratiola ebracteata Benth. ex A.DC.	PLANTAGINACEAE	HEDGE-HYSSOP	native	
Gratiola heterosepala H. Mason & Bacig.	PLANTAGINACEAE	BOGGS LAKE HEDGE-HYSSOP	native	
Gratiola neglecta Torr.	PLANTAGINACEAE	HEDGE-HYSSOP	native	
Grayia spinosa (Hook.) Moq.	CHENOPODIACEAE	HOP-SAGE	native	
Grevillea robusta A. Cunn. ex R. Br.	PROTEACEAE		naturalized	
Grindelia camporum Greene	ASTERACEAE	GUMPLANT	native	
Grindelia camporum Greene var. bracteosa (J. T. Howell) M. A. Lane	ASTERACEAE	GUMPLANT	native	
Grindelia camporum Greene var. camporum	ASTERACEAE	GUMPLANT	native	
Grindelia fraxinipratensis Reveal & Beatley	ASTERACEAE		native	
Grindelia hirsutula Hook. & Arn.	ASTERACEAE	GUMPLANT	native	
Grindelia hirsutula Hook. & Arn. var. davyi (Jeps.) M. A. Lane	ASTERACEAE	GUMPLANT	native	
Grindelia hirsutula Hook. & Arn. var. hallii (Steyerm.) M. A. Lane	ASTERACEAE	SAN DIEGO GUMPLANT	native	
Grindelia hirsutula Hook. & Arn. var. hirsutula	ASTERACEAE	GUMPLANT	native	
Grindelia hirsutula Hook. & Arn. var. maritima (Greene) M. A. Lane	ASTERACEAE	SAN FRANCISCO GUMPLANT	native	
Grindelia nana Nutt.	ASTERACEAE	GUMPLANT	native	
Grindelia squarrosa (Pursh) Dunal	ASTERACEAE	GUMPLANT	naturalized	
Grindelia squarrosa (Pursh) Dunal var. serrulata (Rydb.) Steyerm.	ASTERACEAE	GUMPLANT	naturalized	
Grindelia stricta DC.	ASTERACEAE	GUMPLANT	native	
Grindelia stricta DC. var. angustifolia (A. Gray) M. A. Lane	ASTERACEAE	MARSH GUMPLANT	native	
Grindelia stricta DC. var. platyphylla (Greene) M. A. Lane	ASTERACEAE	GUMPLANT	native	
Grindelia stricta DC. var. stricta	ASTERACEAE	GUMPLANT	native	
Grusonia parishii (Orcutt) Pinkava	CACTACEAE		native	
Grusonia pulchella (Engelm.) H. Rob.	CACTACEAE		native	
Guilleminea densa (Willd.) Moq.	AMARANTHACEAE		naturalized	
Guillenia flavescens (Hook.) Greene	BRASSICACEAE		native	
Guillenia lasiophylla (Hook. & Arn.) Greene	BRASSICACEAE	CALIFORNIA MUSTARD	native	
Guizotia abyssinica (L. f.) Cass.	ASTERACEAE	RAMTILLA	naturalized	
Gunnera tinctoria (Molina) Mirb.	GUNNERACEAE		naturalized	
Gutierrezia californica (DC.) Torr. & A. Gray	ASTERACEAE	CALIFORNIA MATCHWEED	native	
Gutierrezia microcephala (DC.) A. Gray	ASTERACEAE	STICKY SNAKEWEED	native	
Gutierrezia sarothrae (Pursh) Britton & Rusby	ASTERACEAE	BROOM SNAKEWEED; MATCHWEED	native	
Gymnosteris parvula A. Heller	POLEMONIACEAE		native	
Gypsophila elegans M. Bieb.	CARYOPHYLLACEAE	BABY'S-BREATH	naturalized	
Gypsophila paniculata L.	CARYOPHYLLACEAE	BABY'S-BREATH	naturalized	
Hackelia amethystina J. T. Howell ex Eastw.	BORAGINACEAE	AMETHYST STICKSEED	native	
Hackelia bella (J. F. Macbr.) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hackelia brevicula (Jeps.) J. L. Gentry	BORAGINACEAE	POISON CANYON STICK-SEED	native	
Hackelia californica (A. Gray) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hackelia cusickii (Piper) Brand	BORAGINACEAE	CUSICK'S STICKSEED	native	
Hackelia floribunda (Lehm.) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hackelia micrantha (Eastw.) J. L. Gentry	BORAGINACEAE	STICKSEED	native	
Hackelia mundula (Jeps.) Ferris	BORAGINACEAE	STICKSEED	native	
Hackelia nervosa (Kellogg) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hackelia setosa (Piper) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hackelia sharsmithii I. M. Johnst.	BORAGINACEAE	SHARSMITH'S STICKSEED	native	
Hackelia velutina (Piper) I. M. Johnst.	BORAGINACEAE	STICKSEED	native	
Hainardia cylindrica (Willd.) Greuter	POACEAE		naturalized	
Halimolobos jaegeri (Munz) Rollins	BRASSICACEAE		native	
Halimolobos virgata (Nutt.) O. E. Schulz	BRASSICACEAE	VIRGATE HALIMOLOBOS	native	
Halogeton glomeratus (M. Bieb.) C. A. Mey.	CHENOPODIACEAE		naturalized	
Haloragis erecta (Murray) Eichler	HALORAGACEAE		naturalized	
Harmonia doris-nilesiae (T. W. Nelson & J. P. Nelson) B. G. Baldwin	ASTERACEAE		native	
Harmonia guggolziorum B. G. Baldwin	ASTERACEAE		native	
Harmonia hallii (D. D. Keck) B. G. Baldwin	ASTERACEAE		native	
Harmonia nutans (Greene) B. G. Baldwin	ASTERACEAE		native	
Harmonia stebbinsii (T. W. Nelson & J. P. Nelson) B. G. Baldwin	ASTERACEAE		native	
Harpagonella palmeri A. Gray	BORAGINACEAE	PALMER'S GRAPPLING HOOK	native	
Hastingsia alba (Durand) S. Watson	AGAVACEAE		native	
Hastingsia serpentinicola Becking	AGAVACEAE		native	
Hazardia brickellioides (S. F. Blake) W. D. Clark	ASTERACEAE		native	
Hazardia cana (A. Gray) Greene	ASTERACEAE	SAN CLEMENTE ISLAND HAZARDIA	native	
Hazardia detonsa (Greene) Greene	ASTERACEAE	ISLAND HAZARDIA	native	
Hazardia orcuttii (A. Gray) Greene	ASTERACEAE	ORCUTT'S HAZARDIA	native	
Hazardia squarrosa (Hook. & Arn.) Greene	ASTERACEAE	SAW-TOOTHED GOLDENBUSH	native	
Hazardia squarrosa (Hook. & Arn.) Greene var. grindelioides (DC.) W. D. Clark	ASTERACEAE		native	
Hazardia squarrosa (Hook. & Arn.) Greene var. obtusa (Greene) Jeps.	ASTERACEAE		native	
Hazardia squarrosa (Hook. & Arn.) Greene var. squarrosa	ASTERACEAE		native	
Hazardia stenolepis (H. M. Hall) Hoover	ASTERACEAE		native	
Hazardia whitneyi (A. Gray) Greene	ASTERACEAE		native	
Hazardia whitneyi (A. Gray) Greene var. discoidea (J. T. Howell) W. D. Clark	ASTERACEAE		native	
Hazardia whitneyi (A. Gray) Greene var. whitneyi	ASTERACEAE		native	
Hecastocleis shockleyi A. Gray	ASTERACEAE		native	
Hedeoma drummondii Benth.	LAMIACEAE	MOCK PENNYROYAL	native	
Hedeoma nana (Torr.) Briq.	LAMIACEAE	MOCK PENNYROYAL	native	
Hedeoma nana (Torr.) Briq. subsp. californica W. S. Stewart	LAMIACEAE	MOCK PENNYROYAL	native	
Hedera canariensis Willd.	ARALIACEAE		naturalized	
Hedera helix L.	ARALIACEAE	ENGLISH IVY	naturalized	
Hedypnois cretica (L.) Dum.Cours.	ASTERACEAE	CRETE WEED	naturalized	
Helenium amarum (Raf.) H. Rock	ASTERACEAE	SNEEZEWEED	naturalized	
Helenium autumnale L.	ASTERACEAE	SNEEZEWEED	native	
Helenium autumnale L. var. grandiflorum (Nutt.) Torr. & A. Gray	ASTERACEAE	SNEEZEWEED	native	
Helenium autumnale L. var. montanum (Nutt.) Fernald	ASTERACEAE	SNEEZEWEED	native	
Helenium bigelovii A. Gray	ASTERACEAE	SNEEZEWEED	native	
Helenium bolanderi A. Gray	ASTERACEAE	SNEEZEWEED	native	
Helenium puberulum DC.	ASTERACEAE	SNEEZEWEED	native	
Helianthella californica A. Gray	ASTERACEAE		native	
Helianthella californica A. Gray var. californica	ASTERACEAE		native	
Helianthella californica A. Gray var. nevadensis (Greene) Jeps.	ASTERACEAE		native	
Helianthella californica A. Gray var. shastensis W. A. Weber	ASTERACEAE		native	
Helianthella castanea Greene	ASTERACEAE	DIABLO HELIANTHELLA	native	
Helianthemum greenei B. L. Rob.	CISTACEAE	ISLAND RUSH-ROSE	native	
Helianthemum scoparium Nutt.	CISTACEAE	PEAK RUSH-ROSE	native	
Helianthus annuus L.	ASTERACEAE	SUNFLOWER	native	
Helianthus bolanderi A. Gray	ASTERACEAE	SUNFLOWER	native	
Helianthus californicus DC.	ASTERACEAE	SUNFLOWER	native	
Helianthus ciliaris DC.	ASTERACEAE	BLUEWEED	naturalized	
Helianthus cusickii A. Gray	ASTERACEAE	SUNFLOWER	native	
Helianthus exilis A. Gray	ASTERACEAE		native	
Helianthus gracilentus A. Gray	ASTERACEAE	SUNFLOWER	native	
Helianthus maximilianii Schrad.	ASTERACEAE	SUNFLOWER	naturalized	
Helianthus niveus (Benth.) Brandegee	ASTERACEAE	SUNFLOWER	native	
Helianthus niveus (Benth.) Brandegee subsp. canescens (A. Gray) Heiser	ASTERACEAE	SUNFLOWER	native	
Helianthus niveus (Benth.) Brandegee subsp. tephrodes (A. Gray) Heiser	ASTERACEAE	ALGODONES DUNES SUNFLOWER	native	
Helianthus nuttallii Torr. & A. Gray	ASTERACEAE	SUNFLOWER	native	
Helianthus nuttallii Torr. & A. Gray subsp. nuttallii	ASTERACEAE	SUNFLOWER	native	
Helianthus petiolaris Nutt.	ASTERACEAE	SUNFLOWER	naturalized	
Helianthus petiolaris Nutt. subsp. petiolaris	ASTERACEAE	SUNFLOWER	naturalized	
Helichrysum petiolare Hilliard & B. L. Burtt	ASTERACEAE		naturalized	
Heliomeris multiflora Nutt.	ASTERACEAE	GOLDEN-EYE	native	
Heliomeris multiflora Nutt. var. nevadensis (A. Nelson) W. F. Yates	ASTERACEAE	GOLDEN-EYE	native	
Heliotropium amplexicaule Vahl	BORAGINACEAE	HELIOTROPE	naturalized	
Heliotropium convolvulaceum (Nutt.) A. Gray	BORAGINACEAE	HELIOTROPE	native	
Heliotropium convolvulaceum (Nutt.) A. Gray var. californicum (Greene) I. M. Johnst.	BORAGINACEAE	HELIOTROPE	native	
Heliotropium curassavicum L.	BORAGINACEAE	HELIOTROPE	native	
Heliotropium europaeum L.	BORAGINACEAE	HELIOTROPE	naturalized	
Helipterum roseum (Hook.) Benth.	ASTERACEAE		naturalized	acceptance uncertain
Helminthotheca echioides (L.) Holub	ASTERACEAE		naturalized	
Hemitomes congestum A. Gray	ERICACEAE	GNOME PLANT	native	
Hemizonella minima (A. Gray) A. Gray	ASTERACEAE		native	
Hemizonia congesta DC.	ASTERACEAE	HAYFIELD TARWEED	native	
Hemizonia congesta DC. subsp. calyculata Babc. & H. M. Hall	ASTERACEAE	MENDOCINO TARPLANT	native	
Hemizonia congesta DC. subsp. clevelandii (Greene) Babc. & H. M. Hall	ASTERACEAE	TARPLANT; TARWEED	native	
Hemizonia congesta DC. subsp. congesta	ASTERACEAE	TARPLANT; TARWEED	native	
Hemizonia congesta DC. subsp. lutescens (Greene) Babc. & H. M. Hall	ASTERACEAE		native	
Hemizonia congesta DC. subsp. luzulifolia (DC.) Babc. & H. M. Hall	ASTERACEAE	TARPLANT; TARWEED	native	
Hemizonia congesta DC. subsp. tracyi Babc. & H. M. Hall	ASTERACEAE	TRACY'S TARPLANT	native	
Heracleum maximum W. Bartram	APIACEAE		native	
Herissantia crispa (L.) Brizicky	MALVACEAE	CURLY ABUTILON	native	
Herniaria hirsuta L.	CARYOPHYLLACEAE		naturalized	
Herniaria hirsuta L. var. cinerea (DC.) Loret & Barrandon	CARYOPHYLLACEAE		naturalized	
Herniaria hirsuta L. var. hirsuta	CARYOPHYLLACEAE		naturalized	
Hesperevax acaulis (Kellogg) Greene	ASTERACEAE		native	
Hesperevax acaulis (Kellogg) Greene var. acaulis	ASTERACEAE	DWARF EVAX	native	
Hesperevax acaulis (Kellogg) Greene var. ambusticola Morefield	ASTERACEAE	FIRE EVAX	native	
Hesperevax acaulis (Kellogg) Greene var. robustior Morefield	ASTERACEAE		native	
Hesperevax caulescens (Benth.) A. Gray	ASTERACEAE	HOGWALLOW STARFISH	native	
Hesperevax sparsiflora (A. Gray) Greene	ASTERACEAE		native	
Hesperevax sparsiflora (A. Gray) Greene var. brevifolia (A. Gray) Morefield	ASTERACEAE	SHORT-LEAVED EVAX	native	
Hesperevax sparsiflora (A. Gray) Greene var. sparsiflora	ASTERACEAE		native	
Hesperis matronalis L.	BRASSICACEAE	DAME'S ROCKET	naturalized	
Hesperocallis undulata A. Gray	AGAVACEAE	DESERT LILY	native	
Hesperochiron californicus (Benth.) S. Watson	BORAGINACEAE		native	
Hesperochiron pumilus (Griseb.) Porter	BORAGINACEAE		native	
Hesperocnide tenella Torr.	URTICACEAE	WESTERN NETTLE	native	
Hesperocyparis abramsiana (C. B. Wolf) Bartel	CUPRESSACEAE		native	
Hesperocyparis abramsiana (C. B. Wolf) Bartel var. abramsiana	CUPRESSACEAE		native	
Hesperocyparis abramsiana (C. B. Wolf) Bartel var. butanoensis (Silba) Bartel & R.P. Adams	CUPRESSACEAE		native	
Hesperocyparis bakeri (Jeps.) Bartel	CUPRESSACEAE		native	
Hesperocyparis forbesii (Jeps.) Bartel	CUPRESSACEAE		native	
Hesperocyparis goveniana (Gordon) Bartel	CUPRESSACEAE		native	
Hesperocyparis macnabiana (A. Murray bis) Bartel	CUPRESSACEAE		native	
Hesperocyparis macrocarpa (Hartw.) Bartel	CUPRESSACEAE		native	
Hesperocyparis nevadensis (Abrams) Bartel	CUPRESSACEAE		native	
Hesperocyparis pygmaea (Lemmon) Bartel	CUPRESSACEAE		native	
Hesperocyparis sargentii (Jeps.) Bartel	CUPRESSACEAE		native	
Hesperocyparis stephensonii (C. B. Wolf) Bartel	CUPRESSACEAE		native	
Hesperolinon adenophyllum (A. Gray) Small	LINACEAE	GLANDULAR DWARF FLAX	native	
Hesperolinon bicarpellatum (H. Sharsm.) H. Sharsm.	LINACEAE	TWO-CARPELLATE DWARF FLAX	native	
Hesperolinon breweri (A. Gray) Small	LINACEAE	BREWER'S DWARF FLAX	native	
Hesperolinon californicum (Benth.) Small	LINACEAE	DWARF FLAX	native	
Hesperolinon clevelandii Small	LINACEAE	DWARF FLAX	native	
Hesperolinon congestum (A. Gray) Small	LINACEAE	MARIN DWARF FLAX	native	
Hesperolinon didymocarpum H. Sharsm.	LINACEAE	LAKE COUNTY DWARF FLAX	native	
Hesperolinon disjunctum H. Sharsm.	LINACEAE	DWARF FLAX	native	
Hesperolinon drymarioides (Curran) Small	LINACEAE	DRYMARIA-LIKE DWARF FLAX	native	
Hesperolinon micranthum (A. Gray) Small	LINACEAE	DWARF FLAX	native	
Hesperolinon sharsmithiae R. O'Donnell	LINACEAE		native	acceptance uncertain
Hesperolinon spergulinum (A. Gray) Small	LINACEAE	DWARF FLAX	native	
Hesperolinon tehamense H. Sharsm.	LINACEAE	DWARF FLAX	native	
Hesperomecon linearis (Benth.) Greene	PAPAVERACEAE		native	
Hesperostipa comata (Trin. & Rupr.) Barkworth	POACEAE	NEEDLE-AND-THREAD	native	
Hesperostipa comata (Trin. & Rupr.) Barkworth subsp. comata	POACEAE		native	
Hesperostipa comata (Trin. & Rupr.) Barkworth subsp. intermedia (Scribn. & Tweedy) Barkworth	POACEAE		native	
Heteranthemis viscidihirta Schott	ASTERACEAE		naturalized	
Heteranthera dubia (Jacq.) MacMill.	PONTEDERIACEAE	WATER STAR-GRASS	native	
Heteranthera limosa (Sw.) Willd.	PONTEDERIACEAE	MUD PLANTAIN	naturalized	
Heterocodon rariflorum Nutt.	CAMPANULACEAE		native	
Heterodraba unilateralis (M. E. Jones) Greene	BRASSICACEAE		native	
Heteromeles arbutifolia (Lindl.) M. Roem.	ROSACEAE	CHRISTMAS BERRY; TOYON	native	
Heteropogon contortus (L.) P. Beauv. ex Roem. & Schult.	POACEAE		native	
Heterotheca grandiflora Nutt.	ASTERACEAE	TELEGRAPH WEED	native	
Heterotheca monarchensis D. A. York, Shevock, & Semple	ASTERACEAE		native	
Heterotheca oregona (Nutt.) Shinners	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca oregona (Nutt.) Shinners var. compacta (D. D. Keck) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca oregona (Nutt.) Shinners var. oregona	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca oregona (Nutt.) Shinners var. rudis (Greene) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca oregona (Nutt.) Shinners var. scaberrima (A. Gray) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca sessiliflora (Nutt.) Shinners	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca sessiliflora (Nutt.) Shinners subsp. bolanderi (A. Gray) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	acceptance uncertain
Heterotheca sessiliflora (Nutt.) Shinners subsp. echioides (Benth.) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	acceptance uncertain
Heterotheca sessiliflora (Nutt.) Shinners subsp. fastigiata (Greene) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca sessiliflora (Nutt.) Shinners subsp. sessiliflora	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca shevockii (Semple) Semple	ASTERACEAE		native	
Heterotheca subaxillaris (Lam.) Britton & Rusby	ASTERACEAE		native	
Heterotheca subaxillaris (Lam.) Britton & Rusby subsp. latifolia (Buckley) Semple	ASTERACEAE		native	
Heterotheca villosa (Pursh) Shinners	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heterotheca villosa (Pursh) Shinners var. minor (Hook.) Semple	ASTERACEAE		native	
Heterotheca villosa (Pursh) Shinners var. scabra (Eastw.) Semple	ASTERACEAE	GOLDENASTER; TELEGRAPH WEED	native	
Heuchera abramsii Rydb.	SAXIFRAGACEAE	ABRAMS' ALUMROOT	native	
Heuchera brevistaminea Wiggins	SAXIFRAGACEAE	MOUNT LAGUNA ALUMROOT	native	
Heuchera cespitosa Eastw.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera cylindrica Douglas ex Hook.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera cylindrica Douglas ex Hook. var. alpina S. Watson	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera elegans Abrams	SAXIFRAGACEAE	URN-FLOWERED ALUMROOT	native	
Heuchera hirsutissima Rosend., Butters & Lakela	SAXIFRAGACEAE	SHAGGY-HAIRED ALUMROOT	native	
Heuchera maxima Greene	SAXIFRAGACEAE	ISLAND ALUMROOT	native	
Heuchera merriamii Eastw.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera micrantha Lindl.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera micrantha Lindl. var. macropetala Shipes & E. F. Wells	SAXIFRAGACEAE		native	acceptance uncertain
Heuchera parishii Rydb.	SAXIFRAGACEAE	PARISH'S ALUMROOT	native	
Heuchera parvifolia Nutt. ex Torr. & A. Gray	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera pilosissima Fisch. & C. A. Mey.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera rubescens Torr.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera rubescens Torr. var. alpicola Jeps.	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera rubescens Torr. var. glandulosa Kellogg	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera rubescens Torr. var. rydbergiana Rosend., Butters & Lakela	SAXIFRAGACEAE	ALUMROOT	native	
Heuchera rubescens Torr. var. versicolor (Greene) M. G. Stewart	SAXIFRAGACEAE	SAN DIEGO COUNTY ALUMROOT	native	
Hibiscus denudatus Benth.	MALVACEAE	PALE FACE	native	
Hibiscus lasiocarpos Cav.	MALVACEAE		native	
Hibiscus trionum L.	MALVACEAE	FLOWER-OF-AN-HOUR	naturalized	
Hieracium albiflorum Hook.	ASTERACEAE	HAWKWEED	native	
Hieracium argutum Nutt.	ASTERACEAE	HAWKWEED	native	
Hieracium aurantiacum L.	ASTERACEAE	HAWKWEED	naturalized	
Hieracium bolanderi A. Gray	ASTERACEAE	HAWKWEED	native	
Hieracium greenei A. Gray	ASTERACEAE	HAWKWEED	native	
Hieracium horridum Fr.	ASTERACEAE	HAWKWEED	native	
Hieracium nudicaule (A. Gray) A. Heller	ASTERACEAE		native	
Hieracium parryi Zahn	ASTERACEAE		native	
Hieracium scouleri Hook.	ASTERACEAE	HAWKWEED	native	
Hieracium triste Willd. ex Spreng.	ASTERACEAE		native	
Hierochloe occidentalis Buckley	POACEAE	SWEETGRASS	native	
Hierochloe odorata (L.) P. Beauv.	POACEAE	VANILLA GRASS	native	
Hippuris vulgaris L.	HIPPURIDACEAE	MARE'S-TAIL	native	
Hirschfeldia incana (L.) Lagr.-Fossat	BRASSICACEAE		naturalized	
Hoffmannseggia glauca (Ortega) Eifert	FABACEAE	HOG POTATO; PIG-NUT	native	
Hoffmannseggia microphylla Torr.	FABACEAE		native	
Hoita macrostachya (DC.) Rydb.	FABACEAE		native	
Hoita orbicularis (Lindl.) Rydb.	FABACEAE		native	
Hoita strobilina (Hook. & Arn.) Rydb.	FABACEAE		native	
Holcus lanatus L.	POACEAE	COMMON VELVET GRASS	naturalized	
Holcus mollis L.	POACEAE	CREEPING VELVET GRASS	naturalized	
Hollisteria lanata S. Watson	POLYGONACEAE		native	
Holmgrenanthe petrophila (Coville & C. V. Morton) Elisens	PLANTAGINACEAE		native	
Holocarpha heermannii (Greene) D. D. Keck	ASTERACEAE		native	
Holocarpha macradenia (DC.) Greene	ASTERACEAE	SANTA CRUZ TARPLANT	native	
Holocarpha obconica (J. C. Clausen & D. D. Keck) D. D. Keck	ASTERACEAE		native	
Holocarpha virgata (A. Gray) D. D. Keck	ASTERACEAE		native	
Holocarpha virgata (A. Gray) D. D. Keck subsp. elongata D. D. Keck	ASTERACEAE	GRACEFUL TARPLANT	native	
Holocarpha virgata (A. Gray) D. D. Keck subsp. virgata	ASTERACEAE		native	
Holodiscus discolor (Pursh) Maxim.	ROSACEAE	OCEANSPRAY	native	
Holodiscus microphyllus Rydb.	ROSACEAE		native	
Holodiscus microphyllus Rydb. var. glabrescens (Greenm.) F. A. Ley	ROSACEAE		native	
Holodiscus microphyllus Rydb. var. microphyllus	ROSACEAE	ROCK SPIRAEA	native	
Holosteum umbellatum L.	CARYOPHYLLACEAE	JAGGED CHICKWEED	naturalized	
Holosteum umbellatum L. subsp. umbellatum	CARYOPHYLLACEAE	JAGGED CHICKWEED	naturalized	
Holozonia filipes (Hook. & Arn.) Greene	ASTERACEAE		native	
Hordeum arizonicum Covas	POACEAE	BARLEY	native	
Hordeum brachyantherum Nevski	POACEAE	BARLEY	native	
Hordeum brachyantherum Nevski subsp. brachyantherum	POACEAE	BARLEY	native	
Hordeum brachyantherum Nevski subsp. californicum (Covas & Stebbins) Bothmer, N. Jacobsen & Seberg	POACEAE	BARLEY	native	
Hordeum depressum (Scribn. & J. G. Sm.) Rydb.	POACEAE	LOW BARLEY	native	
Hordeum intercedens Nevski	POACEAE	BARLEY	native	
Hordeum jubatum L.	POACEAE	FOXTAIL BARLEY	native	
Hordeum marinum Huds.	POACEAE	BARLEY	naturalized	
Hordeum marinum Huds. subsp. gussoneanum (Parl.) Thell.	POACEAE	MEDITERRANEAN BARLEY	naturalized	
Hordeum murinum L.	POACEAE	BARLEY	naturalized	
Hordeum murinum L. subsp. glaucum (Steud.) Tzvelev	POACEAE	BARLEY	naturalized	
Hordeum murinum L. subsp. leporinum (Link) Arcang.	POACEAE	BARLEY	naturalized	
Hordeum murinum L. subsp. murinum	POACEAE	BARLEY	naturalized	
Horkelia bolanderi A. Gray	ROSACEAE	BOLANDER'S HORKELIA	native	
Horkelia californica Cham. & Schltdl.	ROSACEAE		native	
Horkelia californica Cham. & Schltdl. subsp. californica	ROSACEAE		native	
Horkelia californica Cham. & Schltdl. subsp. dissita (Crum) Ertter	ROSACEAE		native	
Horkelia californica Cham. & Schltdl. subsp. frondosa (Greene) Ertter	ROSACEAE		native	
Horkelia clevelandii (Greene) Rydb.	ROSACEAE		native	
Horkelia congesta Hook.	ROSACEAE		native	
Horkelia congesta Hook. subsp. nemorosa D. D. Keck	ROSACEAE	JOSEPHINE HORKELIA	native	
Horkelia cuneata Lindl.	ROSACEAE		native	
Horkelia cuneata Lindl. subsp. cuneata	ROSACEAE		native	
Horkelia cuneata Lindl. subsp. puberula (Rydb.) D. D. Keck	ROSACEAE		native	
Horkelia cuneata Lindl. subsp. sericea (A. Gray) D. D. Keck	ROSACEAE	KELLOGG'S HORKELIA	native	
Horkelia daucifolia (Greene) Rydb.	ROSACEAE		native	
Horkelia fusca Lindl.	ROSACEAE		native	
Horkelia fusca Lindl. subsp. capitata (Lindl.) D. D. Keck	ROSACEAE		native	
Horkelia fusca Lindl. subsp. parviflora (Nutt. ex Hook. & Arn.) D. D. Keck	ROSACEAE		native	
Horkelia fusca Lindl. subsp. tenella (S. Watson) D. D. Keck	ROSACEAE		native	
Horkelia hendersonii Howell	ROSACEAE	HENDERSON'S HORKELIA	native	
Horkelia hispidula Rydb.	ROSACEAE	WHITE MOUNTAINS HORKELIA	native	
Horkelia marinensis (Elmer) Crum in D.D. Keck	ROSACEAE	POINT REYES HORKELIA	native	
Horkelia parryi Greene	ROSACEAE	PARRY'S HORKELIA	native	
Horkelia rydbergii Elmer	ROSACEAE		native	
Horkelia sericata S. Watson	ROSACEAE	HOWELL'S HORKELIA	native	
Horkelia tenuiloba (Torr.) A. Gray	ROSACEAE	THIN-LOBED HORKELIA	native	
Horkelia tridentata Torr.	ROSACEAE		native	
Horkelia tridentata Torr. subsp. flavescens (Rydb.) D. D. Keck	ROSACEAE		native	
Horkelia tridentata Torr. subsp. tridentata	ROSACEAE		native	
Horkelia truncata Rydb.	ROSACEAE	RAMONA HORKELIA	native	
Horkelia tularensis (J. T. Howell) Munz	ROSACEAE	KERN PLATEAU HORKELIA	native	
Horkelia wilderae Parish	ROSACEAE	BARTON FLATS HORKELIA	native	
Horkelia yadonii Ertter	ROSACEAE	SANTA LUCIA HORKELIA	native	
Horkeliella congdonis (Rydb.) Rydb.	ROSACEAE		native	
Horkeliella purpurascens (S. Watson) Rydb.	ROSACEAE		native	
Horsfordia alata (S. Watson) A. Gray	MALVACEAE		native	
Horsfordia newberryi (S. Watson) A. Gray	MALVACEAE		native	
Howellia aquatilis A. Gray	CAMPANULACEAE		native	
Hulsea algida A. Gray	ASTERACEAE		native	
Hulsea brevifolia A. Gray	ASTERACEAE	SHORT-LEAVED HULSEA	native	
Hulsea californica Torr. & A. Gray	ASTERACEAE	SAN DIEGO SUNFLOWER	native	
Hulsea heterochroma A. Gray	ASTERACEAE		native	
Hulsea mexicana Rydb.	ASTERACEAE	MEXICAN HULSEA	native	
Hulsea nana A. Gray	ASTERACEAE		native	
Hulsea vestita A. Gray	ASTERACEAE		native	
Hulsea vestita A. Gray subsp. callicarpha (H. M. Hall) Wilken	ASTERACEAE		native	
Hulsea vestita A. Gray subsp. gabrielensis Wilken	ASTERACEAE		native	
Hulsea vestita A. Gray subsp. inyoensis (D. D. Keck) Wilken	ASTERACEAE	INYO HULSEA	native	
Hulsea vestita A. Gray subsp. parryi (A. Gray) Wilken	ASTERACEAE		native	
Hulsea vestita A. Gray subsp. pygmaea (A. Gray) Wilken	ASTERACEAE		native	
Hulsea vestita A. Gray subsp. vestita	ASTERACEAE		native	
Humulus americanus Nutt.	CANNABACEAE		naturalized	acceptance uncertain
Humulus lupulus L.	CANNABACEAE	EUROPEAN HOP	naturalized	
Hutchinsia procumbens (L.) Desv.	BRASSICACEAE		native	
Hydrilla verticillata (L. f.) Royle	HYDROCHARITACEAE		naturalized	
Hydrocotyle ranunculoides L. f.	APIACEAE		native	
Hydrocotyle sibthorpioides Lam.	APIACEAE		naturalized	
Hydrocotyle umbellata L.	APIACEAE		native	
Hydrocotyle verticillata Thunb.	APIACEAE		native	
Hydrophyllum capitatum Douglas ex Benth.	BORAGINACEAE		native	
Hydrophyllum capitatum Douglas ex Benth. var. alpinum S. Watson	BORAGINACEAE	WOOLEN-BREECHES	native	
Hydrophyllum fendleri (A. Gray) A. Heller	BORAGINACEAE		native	
Hydrophyllum fendleri (A. Gray) A. Heller var. albifrons (A. Heller) J. F. Macbr.	BORAGINACEAE		native	
Hydrophyllum occidentale (S. Watson) A. Gray	BORAGINACEAE		native	
Hydrophyllum tenuipes A. Heller	BORAGINACEAE		native	
Hymenopappus filifolius Hook.	ASTERACEAE		native	
Hymenopappus filifolius Hook. var. eriopodus (A. Nelson) B. L. Turner	ASTERACEAE		native	
Hymenopappus filifolius Hook. var. lugens (Greene) Jeps.	ASTERACEAE		native	
Hymenopappus filifolius Hook. var. megacephalus B. L. Turner	ASTERACEAE		native	
Hymenopappus filifolius Hook. var. nanus (Rydb.) B. L. Turner	ASTERACEAE		native	
Hymenothrix loomisii S. F. Blake	ASTERACEAE		naturalized	
Hymenothrix wrightii A. Gray	ASTERACEAE		native	
Hymenoxys cooperi (A. Gray) Cockerell	ASTERACEAE		native	
Hymenoxys hoopesii (A. Gray) Bierner	ASTERACEAE		native	
Hymenoxys lemmonii (Greene) Cockerell	ASTERACEAE		native	
Hymenoxys odorata DC.	ASTERACEAE		native	
Hyparrhenia hirta (L.) Stapf	POACEAE		naturalized	
Hypericum anagalloides Cham. & Schltdl.	HYPERICACEAE	TINKER'S PENNY	native	
Hypericum androsaemum L.	HYPERICACEAE		naturalized	
Hypericum calycinum L.	HYPERICACEAE		naturalized	acceptance uncertain
Hypericum canariense L.	HYPERICACEAE		naturalized	
Hypericum concinnum Benth.	HYPERICACEAE	GOLD-WIRE	native	
Hypericum formosum Kunth	HYPERICACEAE		native	
Hypericum formosum Kunth var. scouleri (Hook.) J. M. Coult.	HYPERICACEAE		native	
Hypericum hookerianum Wight & Arn.	HYPERICACEAE		naturalized	acceptance uncertain
Hypericum mutilum L.	HYPERICACEAE		naturalized	
Hypericum perforatum L.	HYPERICACEAE	KLAMATHWEED	naturalized	
Hypochaeris glabra L.	ASTERACEAE	SMOOTH CAT'S-EAR	naturalized	
Hypochaeris radicata L.	ASTERACEAE	ROUGH CAT'S-EAR	naturalized	
Hyptis emoryi Torr.	LAMIACEAE	DESERT-LAVENDER	native	
Idahoa scapigera (Hook.) A. Nelson & J. F. Macbr.	BRASSICACEAE	FLAT-POD	native	
Iliamna bakeri (Jeps.) Wiggins	MALVACEAE	BAKER'S GLOBE MALLOW	native	
Iliamna latibracteata Wiggins	MALVACEAE	CALIFORNIA GLOBE MALLOW	native	
Impatiens balfourii Hook. f.	BALSAMINACEAE	JEWELWEED; TOUCH-ME-NOT	naturalized	
Impatiens glandulifera Royle	BALSAMINACEAE		naturalized	
Imperata brevifolia Vasey	POACEAE	SATINTAIL	native	
Inula helenium L.	ASTERACEAE		naturalized	acceptance uncertain
Ionactis alpina (Nutt.) Greene	ASTERACEAE		native	
Ipheion uniflorum (Graham) Raf.	ALLIACEAE	STAR FLOWER	naturalized	
Ipomopsis aggregata (Pursh) V. E. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis aggregata (Pursh) V. E. Grant subsp. bridgesii (A. Gray) V. E. Grant & A. D. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis aggregata (Pursh) V. E. Grant subsp. formosissima (Greene) Wherry	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis arizonica (Greene) Wherry	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis congesta (Hook.) V. E. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis congesta (Hook.) V. E. Grant subsp. congesta	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis congesta (Hook.) V. E. Grant subsp. montana (A. Nelson & P. B. Kenn.) V. E. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis congesta (Hook.) V. E. Grant subsp. palmifrons (Brand) A. G. Day	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis polycladon (Torr.) V. E. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Ipomopsis tenuifolia (A. Gray) V. E. Grant	POLEMONIACEAE	SLENDER-LEAVED IPOMOPSIS	native	
Ipomopsis tenuituba (Rydb.) V. E. Grant	POLEMONIACEAE	SCARLET GILIA	native	
Iris bracteata S. Watson	IRIDACEAE	SISKIYOU IRIS	native	
Iris chrysophylla Howell	IRIDACEAE	YELLOW-FLOWERED IRIS	native	
Iris douglasiana Herb.	IRIDACEAE	IRIS	native	
Iris fernaldii R. C. Foster	IRIDACEAE	IRIS	native	
Iris foetidissima L.	IRIDACEAE		naturalized	
Iris germanica L.	IRIDACEAE		naturalized	
Iris hartwegii Baker	IRIDACEAE	IRIS	native	
Iris hartwegii Baker subsp. australis (Parish) L. W. Lenz	IRIDACEAE	IRIS	native	
Iris hartwegii Baker subsp. columbiana L. W. Lenz	IRIDACEAE	TUOLUMNE IRIS	native	
Iris hartwegii Baker subsp. hartwegii	IRIDACEAE	IRIS	native	
Iris hartwegii Baker subsp. pinetorum (Eastw.) L. W. Lenz	IRIDACEAE	IRIS	native	
Iris innominata L. F. Hend.	IRIDACEAE	DEL NORTE COUNTY IRIS	native	
Iris longipetala Herb.	IRIDACEAE	IRIS	native	
Iris macrosiphon Torr.	IRIDACEAE	IRIS	native	
Iris missouriensis Nutt.	IRIDACEAE	WESTERN BLUE FLAG	native	
Iris munzii R. C. Foster	IRIDACEAE	MUNZ'S IRIS	native	
Iris orientalis Mill.	IRIDACEAE		naturalized	acceptance uncertain
Iris pseudacorus L.	IRIDACEAE	IRIS	naturalized	
Iris purdyi Eastw.	IRIDACEAE	IRIS	native	
Iris tenax Douglas ex Lindl.	IRIDACEAE	IRIS	native	
Iris tenax Douglas ex Lindl. subsp. klamathensis L. W. Lenz	IRIDACEAE	ORLEANS IRIS	native	
Iris tenuissima Dykes	IRIDACEAE	IRIS	native	
Iris tenuissima Dykes subsp. purdyiformis (R. C. Foster) L. W. Lenz	IRIDACEAE	IRIS	native	
Iris tenuissima Dykes subsp. tenuissima	IRIDACEAE	IRIS	native	
Isatis tinctoria L.	BRASSICACEAE	WOAD	naturalized	
Ismelia carinata (Schousb.) Sch. Bip.	ASTERACEAE		naturalized	
Isocoma acradenia (Greene) Greene	ASTERACEAE	GOLDENBUSH	native	
Isocoma acradenia (Greene) Greene var. acradenia	ASTERACEAE	GOLDENBUSH	native	
Isocoma acradenia (Greene) Greene var. bracteosa (Greene) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Isocoma acradenia (Greene) Greene var. eremophila (Greene) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Isocoma arguta Greene	ASTERACEAE	CARQUINEZ GOLDENBUSH	native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom var. decumbens (Greene) G. L. Nesom	ASTERACEAE		native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom var. diabolica G. L. Nesom	ASTERACEAE		native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom var. menziesii	ASTERACEAE	GOLDENBUSH	native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom var. sedoides (Greene) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Isocoma menziesii (Hook. & Arn.) G. L. Nesom var. vernonioides (Nutt.) G. L. Nesom	ASTERACEAE	GOLDENBUSH	native	
Isoetes bolanderi Engelm.	ISOETACEAE	QUILLWORT	native	
Isoetes echinospora Durieu	ISOETACEAE	QUILLWORT	native	
Isoetes howellii Engelm.	ISOETACEAE	QUILLWORT	native	
Isoetes nuttallii A. Braun ex Engelm.	ISOETACEAE	QUILLWORT	native	
Isoetes occidentalis L. F. Hend.	ISOETACEAE	QUILLWORT	native	
Isoetes orcuttii A. A. Eaton	ISOETACEAE	QUILLWORT	native	
Isolepis carinata Hook. & Arn. ex Torr.	CYPERACEAE		native	
Isolepis cernua (Vahl) Roem. & Schult.	CYPERACEAE		native	
Isolepis setacea (L.) R. Br.	CYPERACEAE		naturalized	
Isomeris arborea Nutt.	BRASSICACEAE	BLADDERPOD	native	
Iva axillaris Pursh	ASTERACEAE	WORMWOOD	native	
Iva axillaris Pursh subsp. robustior (Hook.) Bassett	ASTERACEAE	POVERTY WEED	native	
Iva hayesiana A. Gray	ASTERACEAE	SAN DIEGO MARSH-ELDER	native	
Iva nevadensis M. E. Jones	ASTERACEAE	WORMWOOD	native	acceptance uncertain
Ivesia aperta (J. T. Howell) Munz	ROSACEAE		native	
Ivesia aperta (J. T. Howell) Munz var. aperta	ROSACEAE	SIERRA VALLEY IVESIA	native	
Ivesia aperta (J. T. Howell) Munz var. canina Ertter	ROSACEAE	DOG VALLEY IVESIA	native	
Ivesia argyrocoma (Rydb.) Rydb.	ROSACEAE	SILVER-HAIRED IVESIA	native	
Ivesia arizonica (J. T. Howell) Ertter	ROSACEAE		native	
Ivesia arizonica (J. T. Howell) Ertter var. arizonica	ROSACEAE	YELLOW PURPUSIA	native	
Ivesia baileyi S. Watson	ROSACEAE		native	
Ivesia baileyi S. Watson var. baileyi	ROSACEAE	BAILEY'S IVESIA	native	
Ivesia baileyi S. Watson var. beneolens (A. Nelson & J. F. Macbr.) Ertter	ROSACEAE	OWYHEE IVESIA	native	
Ivesia callida (H. M. Hall) Rydb.	ROSACEAE	TAHQUITZ IVESIA	native	
Ivesia campestris (M. E. Jones) Rydb.	ROSACEAE	FIELD IVESIA	native	
Ivesia gordonii (Hook.) Torr. & A. Gray	ROSACEAE		native	
Ivesia jaegeri Munz & I. M. Johnst.	ROSACEAE	JAEGER'S IVESIA	native	
Ivesia kingii S. Watson	ROSACEAE		native	
Ivesia kingii S. Watson var. kingii	ROSACEAE	ALKALI IVESIA	native	
Ivesia longibracteata Ertter	ROSACEAE	CASTLE CRAGS IVESIA	native	
Ivesia lycopodioides A. Gray	ROSACEAE	CLUB-MOSS IVESIA	native	
Ivesia lycopodioides A. Gray subsp. lycopodioides	ROSACEAE		native	
Ivesia lycopodioides A. Gray subsp. megalopetala (Rydb.) D. D. Keck	ROSACEAE		native	
Ivesia lycopodioides A. Gray subsp. scandularis (Rydb.) D. D. Keck	ROSACEAE		native	
Ivesia muirii A. Gray	ROSACEAE		native	
Ivesia paniculata T. W. Nelson & J. P. Nelson	ROSACEAE	ASH CREEK IVESIA	native	
Ivesia patellifera (J. T. Howell) Ertter	ROSACEAE	KINGSTON MOUNTAINS IVESIA	native	
Ivesia pickeringii A. Gray	ROSACEAE	PICKERING'S IVESIA	native	
Ivesia pygmaea A. Gray	ROSACEAE		native	
Ivesia santolinoides A. Gray	ROSACEAE	MOUSETAIL IVESIA	native	
Ivesia saxosa (Greene) Ertter	ROSACEAE		native	
Ivesia sericoleuca (Rydb.) Rydb.	ROSACEAE	PLUMAS IVESIA	native	
Ivesia shockleyi S. Watson	ROSACEAE		native	
Ivesia shockleyi S. Watson var. shockleyi	ROSACEAE		native	
Ivesia unguiculata A. Gray	ROSACEAE	YOSEMITE IVESIA	native	
Ivesia webberi A. Gray	ROSACEAE	WEBBER'S IVESIA	native	
Jamesia americana Torr. & A. Gray	PHILADELPHACEAE	CLIFFBUSH	native	
Jamesia americana Torr. & A. Gray var. rosea C. K. Schneid.	PHILADELPHACEAE	CLIFFBUSH	native	
Jaumea carnosa (Less.) A. Gray	ASTERACEAE		native	
Jensia rammii (Greene) B. G. Baldwin	ASTERACEAE		native	
Jensia yosemitana (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Jepsonia heterandra Eastw.	SAXIFRAGACEAE		native	
Jepsonia malvifolia (Greene) Small	SAXIFRAGACEAE	ISLAND JEPSONIA	native	
Jepsonia parryi (Torr.) Small	SAXIFRAGACEAE		native	
Johanneshowellia puberula (S. Watson) Reveal	POLYGONACEAE		native	
Juglans californica S. Watson	JUGLANDACEAE	CALIFORNIA BLACK WALNUT	native	
Juglans hindsii Jeps. ex R. E. Sm.	JUGLANDACEAE		native	
Juncus acuminatus Michx.	JUNCACEAE	RUSH	native	
Juncus acutus L.	JUNCACEAE	RUSH	native	
Juncus acutus L. subsp. leopoldii (Parl.) Snogerup	JUNCACEAE	RUSH	native	
Juncus ambiguus Guss.	JUNCACEAE	RUSH	native	
Juncus articulatus L.	JUNCACEAE	RUSH	native	
Juncus balticus Willd.	JUNCACEAE	RUSH	native	
Juncus bolanderi Engelm.	JUNCACEAE	RUSH	native	
Juncus brachyphyllus Wiegand	JUNCACEAE	RUSH	native	
Juncus breweri Engelm.	JUNCACEAE	RUSH	native	
Juncus bryoides F. J. Herm.	JUNCACEAE	RUSH	native	
Juncus bufonius L.	JUNCACEAE	TOAD RUSH	native	
Juncus bufonius L. var. bufonius	JUNCACEAE	RUSH	native	
Juncus bufonius L. var. congestus Wahlb.	JUNCACEAE	RUSH	native	
Juncus bufonius L. var. occidentalis F. J. Herm.	JUNCACEAE	RUSH	native	
Juncus capillaris F. J. Herm.	JUNCACEAE	RUSH	native	
Juncus capitatus Weigel	JUNCACEAE	RUSH	naturalized	
Juncus chlorocephalus Engelm.	JUNCACEAE	RUSH	native	
Juncus confusus Coville	JUNCACEAE	RUSH	native	
Juncus cooperi Engelm.	JUNCACEAE	RUSH	native	
Juncus covillei Piper	JUNCACEAE	RUSH	native	
Juncus covillei Piper var. covillei	JUNCACEAE	RUSH	native	
Juncus covillei Piper var. obtusatus (Engelm.) C. L. Hitchc.	JUNCACEAE	RUSH	native	
Juncus cyperoides Laharpe	JUNCACEAE	RUSH	naturalized	
Juncus diffusissimus Buckley	JUNCACEAE	RUSH	naturalized	
Juncus digitatus C. W. Witham & Zika	JUNCACEAE		native	
Juncus drummondii E. Mey.	JUNCACEAE	RUSH	native	
Juncus dubius Engelm.	JUNCACEAE	RUSH	native	
Juncus dudleyi Wiegand	JUNCACEAE	DUDLEY'S RUSH	native	
Juncus duranii Ewan	JUNCACEAE	DURAN'S RUSH	native	
Juncus effusus L.	JUNCACEAE	RUSH	native	
Juncus effusus L. subsp. austrocalifornicus Lint ex Zika	JUNCACEAE		native	acceptance uncertain
Juncus effusus L. var. brunneus Engelm.	JUNCACEAE	RUSH	native	acceptance uncertain
Juncus effusus L. var. exiguus Fernald & Wiegand	JUNCACEAE	RUSH	native	acceptance uncertain
Juncus effusus L. var. gracilis Hook.	JUNCACEAE	RUSH	native	acceptance uncertain
Juncus effusus L. var. pacificus Fernald & Wiegand	JUNCACEAE	RUSH	native	acceptance uncertain
Juncus ensifolius Wikstr.	JUNCACEAE	RUSH	native	
Juncus falcatus E. Mey.	JUNCACEAE	RUSH	native	
Juncus falcatus E. Mey. var. falcatus	JUNCACEAE	RUSH	native	
Juncus gerardii Loisel.	JUNCACEAE		naturalized	acceptance uncertain
Juncus hemiendytus F. J. Herm.	JUNCACEAE	RUSH	native	
Juncus hemiendytus F. J. Herm. var. abjectus (F. J. Herm.) Ertter	JUNCACEAE	CENTER BASIN RUSH	native	
Juncus hemiendytus F. J. Herm. var. hemiendytus	JUNCACEAE	RUSH	native	
Juncus howellii F. J. Herm.	JUNCACEAE	RUSH	native	
Juncus kelloggii Engelm.	JUNCACEAE	RUSH	native	
Juncus leiospermus F. J. Herm.	JUNCACEAE	DWARF RUSH	native	
Juncus leiospermus F. J. Herm. var. ahartii Ertter	JUNCACEAE	AHART'S DWARF RUSH	native	
Juncus leiospermus F. J. Herm. var. leiospermus	JUNCACEAE	RED BLUFF DWARF RUSH	native	
Juncus lescurii Bol.	JUNCACEAE		native	
Juncus longistylis Torr.	JUNCACEAE	RUSH	native	
Juncus luciensis Ertter	JUNCACEAE	RUSH	native	
Juncus macrandrus Coville	JUNCACEAE	RUSH	native	
Juncus macrophyllus Coville	JUNCACEAE	RUSH	native	
Juncus marginatus Rostk.	JUNCACEAE	RUSH	native	
Juncus marginatus Rostk. var. marginatus	JUNCACEAE	RUSH	native	
Juncus mertensianus Bong.	JUNCACEAE	RUSH	native	
Juncus mexicanus Willd.	JUNCACEAE	RUSH	native	acceptance uncertain
Juncus nevadensis S. Watson	JUNCACEAE	RUSH	native	
Juncus nodosus L.	JUNCACEAE	KNOTTED RUSH	native	
Juncus occidentalis (Coville) Wiegand	JUNCACEAE	RUSH	native	
Juncus orthophyllus Coville	JUNCACEAE	RUSH	native	
Juncus oxymeris Engelm.	JUNCACEAE	RUSH	native	
Juncus parryi Engelm.	JUNCACEAE	RUSH	native	
Juncus patens E. Mey.	JUNCACEAE	RUSH	native	
Juncus phaeocephalus Engelm.	JUNCACEAE	RUSH	native	
Juncus phaeocephalus Engelm. var. paniculatus Engelm.	JUNCACEAE	RUSH	native	
Juncus phaeocephalus Engelm. var. phaeocephalus	JUNCACEAE	RUSH	native	
Juncus regelii Buchenau	JUNCACEAE	REGEL'S RUSH	native	
Juncus rugulosus Engelm.	JUNCACEAE	WRINKLED RUSH	native	
Juncus saximontanus A. Nelson	JUNCACEAE	RUSH	native	
Juncus supiniformis Engelm.	JUNCACEAE	HAIR-LEAVED RUSH	native	
Juncus tenuis Willd.	JUNCACEAE	RUSH	native	
Juncus textilis Buchenau	JUNCACEAE	RUSH	native	
Juncus tiehmii Ertter	JUNCACEAE	RUSH	native	
Juncus torreyi Coville	JUNCACEAE	RUSH	native	
Juncus triformis Engelm.	JUNCACEAE	RUSH	native	
Juncus uncialis Greene	JUNCACEAE	RUSH	native	
Juncus usitatus L. A. S. Johnson	JUNCACEAE		naturalized	acceptance uncertain
Juncus xiphioides E. Mey.	JUNCACEAE	RUSH	native	
Juniperus californica Carrière	CUPRESSACEAE	CALIFORNIA JUNIPER	native	
Juniperus communis L.	CUPRESSACEAE	COMMON JUNIPER	native	
Juniperus communis L. var. depressa Pursh	CUPRESSACEAE		native	
Juniperus communis L. var. jackii Rehder	CUPRESSACEAE		native	
Juniperus communis L. var. saxatilis Pall.	CUPRESSACEAE		native	
Juniperus grandis R. P. Adams	CUPRESSACEAE		native	
Juniperus occidentalis Hook.	CUPRESSACEAE	JUNIPER	native	
Juniperus osteosperma (Torr.) Little	CUPRESSACEAE	UTAH JUNIPER	native	
Justicia californica (Benth.) D. N. Gibson	ACANTHACEAE	BELOPERONE; CHUPAROSA	native	
Kallstroemia californica (S. Watson) Vail	ZYGOPHYLLACEAE		native	
Kallstroemia grandiflora Torr. ex A. Gray	ZYGOPHYLLACEAE		naturalized	
Kallstroemia parviflora Norton	ZYGOPHYLLACEAE		naturalized	
Kalmia polifolia Wangenh.	ERICACEAE	LAUREL	native	
Kalmia polifolia Wangenh. subsp. microphylla (Hook.) Calder & Roy L. Taylor	ERICACEAE	LAUREL	native	
Kalmia polifolia Wangenh. subsp. polifolia	ERICACEAE	LAUREL	native	
Keckiella antirrhinoides (Benth.) Straw	PLANTAGINACEAE		native	
Keckiella antirrhinoides (Benth.) Straw var. antirrhinoides	PLANTAGINACEAE		native	
Keckiella antirrhinoides (Benth.) Straw var. microphylla (A. Gray) N. H. Holmgren	PLANTAGINACEAE		native	
Keckiella breviflora (Lindl.) Straw	PLANTAGINACEAE		native	
Keckiella breviflora (Lindl.) Straw var. breviflora	PLANTAGINACEAE		native	
Keckiella breviflora (Lindl.) Straw var. glabrisepala (D. D. Keck) N. H. Holmgren	PLANTAGINACEAE		native	
Keckiella cordifolia (Benth.) Straw	PLANTAGINACEAE		native	
Keckiella corymbosa (Benth. ex A. DC.) Straw	PLANTAGINACEAE		native	
Keckiella lemmonii (A. Gray) Straw	PLANTAGINACEAE		native	
Keckiella rothrockii (A. Gray) Straw	PLANTAGINACEAE		native	
Keckiella rothrockii (A. Gray) Straw var. jacintensis (Abrams) N. H. Holmgren	PLANTAGINACEAE		native	
Keckiella rothrockii (A. Gray) Straw var. rothrockii	PLANTAGINACEAE		native	
Keckiella ternata (Torr.) Straw	PLANTAGINACEAE		native	
Keckiella ternata (Torr.) Straw var. septentrionalis (Munz & I. M. Johnst.) N. H. Holmgren	PLANTAGINACEAE		native	
Keckiella ternata (Torr.) Straw var. ternata	PLANTAGINACEAE		native	
Kelloggia galioides Torr.	RUBIACEAE		native	
Kickxia elatine (L.) Dumort.	PLANTAGINACEAE	FLUELLIN	naturalized	
Kickxia spuria (L.) Dumort.	PLANTAGINACEAE	FLUELLIN	naturalized	
Kniphofia uvaria (L.) Oken	ASPHODELACEAE		naturalized	
Kobresia myosuroides (Vill.) Fiori & Paol.	CYPERACEAE		native	
Kochia americana S. Watson	CHENOPODIACEAE		native	
Kochia californica S. Watson	CHENOPODIACEAE		native	
Kochia scoparia (L.) Schrad.	CHENOPODIACEAE		naturalized	
Kochia scoparia (L.) Schrad. subsp. scoparia	CHENOPODIACEAE		naturalized	
Koeberlinia spinosa Zucc.	KOEBERLINIACEAE	ALLTHORN	native	
Koeberlinia spinosa Zucc. subsp. tenuispina (Kearney & Peebles) E. Murray	KOEBERLINIACEAE	CROWN-OF-THORNS	native	
Koeleria macrantha (Ledeb.) Schult.	POACEAE	JUNEGRASS	native	
Koeleria phleoides (Vill.) Pers.	POACEAE		naturalized	
Koelreuteria elegans (Seem.) A.C. Sm.	SAPINDACEAE		naturalized	acceptance uncertain
Krameria erecta Schult.	KRAMERIACEAE	PIMA RHATANY; PURPLE HEATHER	native	
Krameria grayi Rose & Painter	KRAMERIACEAE	WHITE RHATANY	native	
Krascheninnikovia lanata (Pursh) A. Meeuse & A. Smit	CHENOPODIACEAE	WINTER FAT	native	
Kyhosia bolanderi (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Kyllinga brevifolia Rottb.	CYPERACEAE		naturalized	
Laburnum anagyroides Medik.	FABACEAE		naturalized	acceptance uncertain
Lactuca biennis (Moench) Fernald	ASTERACEAE	LETTUCE	naturalized	
Lactuca canadensis L.	ASTERACEAE	LETTUCE	naturalized	
Lactuca ludoviciana (Nutt.) Riddell	ASTERACEAE	LETTUCE	naturalized	
Lactuca saligna L.	ASTERACEAE	LETTUCE	naturalized	
Lactuca sativa L.	ASTERACEAE		naturalized	acceptance uncertain
Lactuca serriola L.	ASTERACEAE	PRICKLY LETTUCE	naturalized	
Lactuca tatarica (L.) C. A. Mey.	ASTERACEAE	LETTUCE	native	
Lactuca tatarica (L.) C. A. Mey. subsp. pulchella Stebbins	ASTERACEAE	LETTUCE	native	
Lactuca virosa L.	ASTERACEAE	LETTUCE	naturalized	
Ladeania lanceolata (Pursh) A. N. Egan & Reveal	FABACEAE		native	
Laennecia coulteri (A. Gray) G. L. Nesom	ASTERACEAE		native	acceptance uncertain
Lagophylla dichotoma Benth.	ASTERACEAE		native	
Lagophylla glandulosa A. Gray	ASTERACEAE		native	
Lagophylla minor (D. D. Keck) D. D. Keck	ASTERACEAE		native	
Lagophylla ramosissima Nutt.	ASTERACEAE		native	
Lagunaria patersonia (Andrews) G. Don	MALVACEAE		naturalized	acceptance uncertain
Lagurus ovatus L.	POACEAE	HARE'S TAIL	naturalized	
Lamarckia aurea (L.) Moench	POACEAE	GOLDENTOP	naturalized	
Lamiastrum galeobdolon (L.) Ehrend. & Polatschek	LAMIACEAE		naturalized	acceptance uncertain
Lamium amplexicaule L.	LAMIACEAE	DEAD NETTLE	naturalized	
Lamium purpureum L.	LAMIACEAE	DEAD NETTLE	naturalized	
Landoltia punctata (G. Mey.) Les & D. J. Crawford	ARACEAE		native	
Langloisia setosissima (Torr. & A. Gray) Greene	POLEMONIACEAE		native	
Langloisia setosissima (Torr. & A. Gray) Greene subsp. punctata (Coville) Timbrook	POLEMONIACEAE	LILAC SUNBONNET	native	
Langloisia setosissima (Torr. & A. Gray) Greene subsp. setosissima	POLEMONIACEAE	BRISTLY LANGLOISIA	native	
Lantana montevidensis (Spreng.) Briq.	VERBENACEAE		naturalized	
Lappula redowskii (Hornem.) Greene	BORAGINACEAE	STICKSEED	native	
Lappula redowskii (Hornem.) Greene var. cupulata (A. Gray) M. E. Jones	BORAGINACEAE	STICKSEED	native	
Lappula redowskii (Hornem.) Greene var. redowskii	BORAGINACEAE	STICKSEED	native	
Lappula squarrosa (Retz.) Dumort.	BORAGINACEAE	STICKSEED	naturalized	
Lapsana communis L.	ASTERACEAE	NIPPLEWORT	naturalized	
Larrea tridentata (DC.) Coville	ZYGOPHYLLACEAE	CREOSOTE BUSH	native	
Lasiospermum bipinnatum (Thunb.) Druce	ASTERACEAE		naturalized	
Lastarriaea coriacea (Goodman) Hoover	POLYGONACEAE		native	
Lasthenia burkei (Greene) Greene	ASTERACEAE	BURKE'S GOLDFIELDS	native	
Lasthenia californica DC. ex Lindl.	ASTERACEAE	GOLDFIELDS	native	
Lasthenia californica DC. ex Lindl. subsp. bakeri (J. T. Howell) R. Chan	ASTERACEAE		native	
Lasthenia californica DC. ex Lindl. subsp. californica	ASTERACEAE		native	
Lasthenia californica DC. ex Lindl. subsp. macrantha (A. Gray) R. Chan	ASTERACEAE		native	
Lasthenia chrysantha (Greene ex A. Gray) Greene	ASTERACEAE	GOLDFIELDS	native	
Lasthenia conjugens Greene	ASTERACEAE	CONTRA COSTA GOLDFIELDS	native	
Lasthenia coronaria (Nutt.) Ornduff	ASTERACEAE	GOLDFIELDS	native	
Lasthenia debilis (Greene ex A. Gray) Ornduff	ASTERACEAE	GOLDFIELDS	native	
Lasthenia ferrisiae Ornduff	ASTERACEAE	GOLDFIELDS	native	
Lasthenia fremontii (Torr. ex A. Gray) Greene	ASTERACEAE	GOLDFIELDS	native	
Lasthenia glaberrima DC.	ASTERACEAE	GOLDFIELDS	native	
Lasthenia glabrata Lindl.	ASTERACEAE	GOLDFIELDS	native	
Lasthenia glabrata Lindl. subsp. coulteri (A. Gray) Ornduff	ASTERACEAE	COULTER GOLDFIELDS	native	
Lasthenia glabrata Lindl. subsp. glabrata	ASTERACEAE	GOLDFIELDS	native	
Lasthenia gracilis (DC.) Greene	ASTERACEAE		native	
Lasthenia leptalea (A. Gray) Ornduff	ASTERACEAE	SALINAS VALLEY GOLDFIELDS	native	
Lasthenia maritima (A. Gray) M. C. Vasey	ASTERACEAE	MARITIME GOLDFIELDS	native	
Lasthenia microglossa (DC.) Greene	ASTERACEAE	GOLDFIELDS	native	
Lasthenia minor (DC.) Ornduff	ASTERACEAE	GOLDFIELDS	native	
Lasthenia platycarpha (A. Gray) Greene	ASTERACEAE	GOLDFIELDS	native	
Lathrocasis tenerrima (A. Gray) L.A. Johnson	POLEMONIACEAE		native	acceptance uncertain
Lathyrus angulatus L.	FABACEAE	WILD PEA	naturalized	
Lathyrus aphaca L.	FABACEAE	WILD PEA	naturalized	
Lathyrus biflorus T. W. Nelson & J. P. Nelson	FABACEAE	TWO-FLOWERED PEA	native	
Lathyrus brownii Eastw.	FABACEAE	WILD PEA	native	
Lathyrus cicera L.	FABACEAE	WILD PEA	naturalized	
Lathyrus delnorticus C. L. Hitchc.	FABACEAE	DEL NORTE PEA	native	
Lathyrus glandulosus Broich	FABACEAE	STICKY PEA	native	
Lathyrus hirsutus L.	FABACEAE	CALEY PEA	naturalized	
Lathyrus hitchcockianus Barneby & Reveal	FABACEAE	WILD PEA	native	
Lathyrus japonicus Willd.	FABACEAE	WILD PEA	native	
Lathyrus jepsonii Greene	FABACEAE	WILD PEA	native	
Lathyrus jepsonii Greene var. californicus (S. Watson) Hoover	FABACEAE	WILD PEA	native	
Lathyrus jepsonii Greene var. jepsonii	FABACEAE	DELTA TULE PEA	native	
Lathyrus lanszwertii Kellogg	FABACEAE	WILD PEA	native	
Lathyrus lanszwertii Kellogg var. aridus (Piper) Jeps.	FABACEAE	WILD PEA	native	
Lathyrus lanszwertii Kellogg var. lanszwertii	FABACEAE	WILD PEA	native	
Lathyrus lanszwertii Kellogg var. tracyi (Bradshaw) Isely	FABACEAE	WILD PEA	native	
Lathyrus latifolius L.	FABACEAE	PERENNIAL SWEET PEA	naturalized	
Lathyrus littoralis (Nutt.) Endl. ex Walp.	FABACEAE	WILD PEA	native	
Lathyrus nevadensis S. Watson	FABACEAE	WILD PEA	native	
Lathyrus nevadensis S. Watson var. nevadensis	FABACEAE	WILD PEA	native	
Lathyrus odoratus L.	FABACEAE	SWEET PEA	naturalized	
Lathyrus palustris L.	FABACEAE	MARSH PEA	native	
Lathyrus polyphyllus Nutt.	FABACEAE	WILD PEA	native	
Lathyrus rigidus T. G. White	FABACEAE	WILD PEA	native	
Lathyrus sphaericus Retz.	FABACEAE	WILD PEA	naturalized	
Lathyrus splendens Kellogg	FABACEAE	CAMPO PEA; PRIDE OF CALIFORNIA	native	
Lathyrus sulphureus A. Gray	FABACEAE	WILD PEA	native	
Lathyrus sulphureus A. Gray var. argillaceus Jeps.	FABACEAE		native	
Lathyrus sulphureus A. Gray var. sulphureus	FABACEAE		native	
Lathyrus tingitanus L.	FABACEAE	TANGIER PEA	naturalized	
Lathyrus torreyi A. Gray	FABACEAE	WILD PEA	native	
Lathyrus vestitus Nutt.	FABACEAE	WILD PEA	native	
Lathyrus vestitus Nutt. var. alefeldii (T. G. White) Isely	FABACEAE	WILD PEA	native	
Lathyrus vestitus Nutt. var. ochropetalus (Piper) Isely	FABACEAE	WILD PEA	native	
Lathyrus vestitus Nutt. var. vestitus	FABACEAE	WILD PEA	native	
Lavatera trimestris L.	MALVACEAE		naturalized	acceptance uncertain
Layia carnosa (Nutt.) Torr. & A. Gray	ASTERACEAE	BEACH LAYIA	native	
Layia chrysanthemoides (DC.) A. Gray	ASTERACEAE		native	
Layia discoidea D. D. Keck	ASTERACEAE	RAYLESS LAYIA	native	
Layia fremontii (Torr. & A. Gray) A. Gray	ASTERACEAE		native	
Layia gaillardioides (Hook. & Arn.) DC.	ASTERACEAE		native	
Layia glandulosa (Hook.) Hook. & Arn.	ASTERACEAE	WHITE LAYIA	native	
Layia heterotricha (DC.) Hook. & Arn.	ASTERACEAE	PALE-YELLOW LAYIA	native	
Layia hieracioides (DC.) Hook. & Arn.	ASTERACEAE		native	
Layia jonesii A. Gray	ASTERACEAE	JONES' LAYIA	native	
Layia leucopappa D. D. Keck	ASTERACEAE	COMANCHE POINT LAYIA	native	
Layia munzii D. D. Keck	ASTERACEAE	MUNZ' TIDY-TIPS	native	
Layia pentachaeta A. Gray	ASTERACEAE		native	
Layia pentachaeta A. Gray subsp. albida D. D. Keck	ASTERACEAE		native	
Layia pentachaeta A. Gray subsp. pentachaeta	ASTERACEAE		native	
Layia platyglossa (Fisch. & C. A. Mey.) A. Gray	ASTERACEAE	TIDY-TIPS	native	
Layia septentrionalis D. D. Keck	ASTERACEAE	COLUSA LAYIA	native	
Leersia oryzoides (L.) Sw.	POACEAE	RICE CUTGRASS	native	
Legenere limosa (Greene) McVaugh	CAMPANULACEAE	LEGENERE	native	
Lemna aequinoctialis Welw.	ARACEAE	DUCKWEED	native	
Lemna gibba L.	ARACEAE	DUCKWEED	native	
Lemna minor L.	ARACEAE	DUCKWEED	native	
Lemna minuta Kunth	ARACEAE	DUCKWEED	native	
Lemna trisulca L.	ARACEAE	DUCKWEED	native	
Lemna turionifera Landolt	ARACEAE	DUCKWEED	native	
Lemna valdiviana Phil.	ARACEAE	DUCKWEED	native	
Leonotis leonurus (L.) W. T. Aiton.	LAMIACEAE		naturalized	acceptance uncertain
Leontodon saxatilis Lam.	ASTERACEAE		naturalized	
Leontodon saxatilis Lam. subsp. longirostris (Finch & P. D. Sell) P. Silva	ASTERACEAE		naturalized	acceptance uncertain
Leontodon saxatilis Lam. subsp. saxatilis	ASTERACEAE		naturalized	acceptance uncertain
Leonurus sibiricus L.	LAMIACEAE		naturalized	acceptance uncertain
Lepechinia calycina (Benth.) Epling ex Munz	LAMIACEAE	PITCHER SAGE	native	
Lepechinia cardiophylla Epling	LAMIACEAE	HEART-LEAVED PITCHER SAGE	native	
Lepechinia fragrans (Greene) Epling	LAMIACEAE	FRAGRANT PITCHER SAGE	native	
Lepechinia ganderi Epling	LAMIACEAE	GANDER'S PITCHER SAGE	native	
Lepechinia rossii S. Boyd & Mistretta	LAMIACEAE		native	acceptance uncertain
Lepidium appelianum Al-Shehbaz	BRASSICACEAE		native	
Lepidium campestre (L.) W. T. Aiton	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium densiflorum Schrad.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium densiflorum Schrad. var. densiflorum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium densiflorum Schrad. var. elongatum (Rydb.) Thell.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium densiflorum Schrad. var. macrocarpum G. A. Mulligan	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium densiflorum Schrad. var. pubicarpum (A. Nelson) Thell.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium densiflorum Schrad. var. ramosum (A. Nelson) Thell.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium dictyotum A. Gray	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium dictyotum A. Gray var. acutidens A. Gray	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium dictyotum A. Gray var. dictyotum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium didymum L.	BRASSICACEAE		naturalized	
Lepidium draba L.	BRASSICACEAE		naturalized	
Lepidium draba L. subsp. chalepense (L.) Thell.	BRASSICACEAE		naturalized	
Lepidium draba L. subsp. draba	BRASSICACEAE		naturalized	
Lepidium flavum Torr.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium flavum Torr. var. felipense C. L. Hitchc.	BRASSICACEAE	BORREGO VALLEY PEPPERGRASS	native	
Lepidium flavum Torr. var. flavum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium fremontii S. Watson	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium heterophyllum Benth.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium jaredii Brandegee	BRASSICACEAE	JARED'S PEPPERGRASS	native	
Lepidium lasiocarpum Nutt.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium lasiocarpum Nutt. var. lasiocarpum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium latifolium L.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium latipes Hook.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium latipes Hook. var. heckardii Rollins	BRASSICACEAE	HECKARD'S PEPPERGRASS	native	
Lepidium latipes Hook. var. latipes	BRASSICACEAE	DWARF PEPPERGRASS	native	
Lepidium montanum Nutt.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium montanum Nutt. var. canescens (Thell.) C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium montanum Nutt. var. cinereum (C. L. Hitchc.) Rollins	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium montanum Nutt. var. montanum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium nitidum Nutt.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium nitidum Nutt. var. howellii C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium nitidum Nutt. var. nitidum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium nitidum Nutt. var. oreganum (Greene) C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium oblongum Small	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium oblongum Small var. insulare C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium oblongum Small var. oblongum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium oxycarpum Torr. & A. Gray	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium perfoliatum L.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium pinnatifidum Ledeb.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium ramosissimum A. Nelson	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium ramosissimum A. Nelson var. bourgeauanum (Thell.) Rollins	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium squamatum Forssk.	BRASSICACEAE		naturalized	
Lepidium strictum (S. Watson) Rattan	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidium thurberi Wooton	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium virginicum L.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium virginicum L. var. medium (Greene) C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium virginicum L. var. pubescens (Greene) Thell.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium virginicum L. var. robinsonii (Thell.) C. L. Hitchc.	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	native	
Lepidium virginicum L. var. virginicum	BRASSICACEAE	PEPPERGRASS; PEPPERWORT	naturalized	
Lepidospartum latisquamum S. Watson	ASTERACEAE	SCALE-BROOM	native	
Lepidospartum squamatum (A. Gray) A. Gray	ASTERACEAE	SCALE-BROOM	native	
Leptochloa dubia (Kunth) Nees	POACEAE		naturalized	
Leptochloa fascicularis (Lam.) A. Gray	POACEAE	BEARDED SPRANGLETOP	native	
Leptochloa mucronata (Michx.) Kunth	POACEAE	RED SPRANGLETOP	native	acceptance uncertain
Leptochloa uninervia (J. Presl) Hitchc. & Chase	POACEAE	MEXICAN SPRANGLETOP	native	
Leptochloa viscida (Scribn.) Beal	POACEAE	STICKY SPRANGLETOP	native	
Leptosiphon acicularis (Greene) Jeps.	POLEMONIACEAE		native	
Leptosiphon ambiguus (Rattan) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon androsaceus Benth.	POLEMONIACEAE		native	
Leptosiphon aureus (Nutt.) Benth. ex E. Vilm.	POLEMONIACEAE		native	
Leptosiphon aureus (Nutt.) Benth. ex E. Vilm. subsp. aureus	POLEMONIACEAE		native	
Leptosiphon aureus (Nutt.) Benth. ex E. Vilm. subsp. decorus (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon bicolor Nutt.	POLEMONIACEAE		native	
Leptosiphon bolanderi (A. Gray) J.M. Porter & L.A. Johnson	POLEMONIACEAE		native	
Leptosiphon breviculus (A. Gray) J.M. Porter & L.A. Johnson	POLEMONIACEAE		native	
Leptosiphon ciliatus (Benth.) Jeps.	POLEMONIACEAE		native	
Leptosiphon croceus (Eastw.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon filipes (Benth.) J.M. Porter & L.A. Johnson	POLEMONIACEAE		native	
Leptosiphon floribundus (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon floribundus (A. Gray) J. M. Porter & L. A. Johnson subsp. floribundus	POLEMONIACEAE		native	
Leptosiphon floribundus (A. Gray) J. M. Porter & L. A. Johnson subsp. glaber (R. Patt.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon floribundus (A. Gray) J. M. Porter & L. A. Johnson subsp. hallii (Jeps.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon grandiflorus Benth.	POLEMONIACEAE		native	
Leptosiphon harknessii (Curran) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon jepsonii (Schemske & Goodwillie) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon latisectus (E. G. Buxton) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon lemmonii (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon liniflorus (Benth.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon minimus (H. Mason) R. Battaglia	POLEMONIACEAE		native	
Leptosiphon montanus (Greene) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon nudatus (Greene) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon nuttallii (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon nuttallii (A. Gray) J. M. Porter & L. A. Johnson subsp. howellii (T. W. Nelson & R. Patt.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon nuttallii (A. Gray) J. M. Porter & L. A. Johnson subsp. nuttallii	POLEMONIACEAE		native	
Leptosiphon nuttallii (A. Gray) J. M. Porter & L. A. Johnson subsp. pubescens (R. Patt.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon oblanceolatus (Brand) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon pachyphyllus (R. Patt.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon parviflorus Benth.	POLEMONIACEAE		native	
Leptosiphon pygmaeus (Brand) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon pygmaeus (Brand) J. M. Porter & L. A. Johnson subsp. continentalis (P. H. Raven) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon pygmaeus (Brand) J. M. Porter & L. A. Johnson subsp. pygmaeus	POLEMONIACEAE		native	
Leptosiphon rattanii (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon rosaceus (Hook. f.) Battaglia	POLEMONIACEAE		native	
Leptosiphon septentrionalis (H. Mason) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptosiphon serrulatus (Greene) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Leptospermum laevigatum (Gaertn.) F. Muell.	MYRTACEAE		naturalized	
Leptosyne bigelovii A. Gray	ASTERACEAE		native	
Leptosyne californica Nutt.	ASTERACEAE		native	
Leptosyne calliopsidea (DC.) A. Gray	ASTERACEAE		native	
Leptosyne douglasii DC.	ASTERACEAE		native	
Leptosyne gigantea Kellogg	ASTERACEAE		native	
Leptosyne hamiltonii Elmer	ASTERACEAE		native	
Leptosyne maritima (Nutt.) A. Gray	ASTERACEAE		native	
Leptosyne stillmanii A. Gray	ASTERACEAE		native	
Lessingia arachnoidea Greene	ASTERACEAE	CRYSTAL SPRINGS LESSINGIA	native	
Lessingia germanorum Cham.	ASTERACEAE	SAN FRANCISCO LESSINGIA	native	
Lessingia glandulifera A. Gray	ASTERACEAE		native	
Lessingia glandulifera A. Gray var. glandulifera	ASTERACEAE		native	
Lessingia glandulifera A. Gray var. pectinata (Greene) Jeps.	ASTERACEAE		native	
Lessingia glandulifera A. Gray var. tomentosa (Greene) Ferris	ASTERACEAE	WARNER SPRINGS LESSINGIA	native	
Lessingia hololeuca Greene	ASTERACEAE	WOOLLY-HEADED LESSINGIA	native	
Lessingia lemmonii A. Gray	ASTERACEAE		native	
Lessingia lemmonii A. Gray var. lemmonii	ASTERACEAE		native	
Lessingia lemmonii A. Gray var. peirsonii (J. T. Howell) Ferris	ASTERACEAE		native	
Lessingia lemmonii A. Gray var. ramulosissima (A. Nelson) Ferris	ASTERACEAE		native	
Lessingia leptoclada A. Gray	ASTERACEAE		native	
Lessingia micradenia Greene	ASTERACEAE		native	
Lessingia micradenia Greene var. glabrata (D. D. Keck) Ferris	ASTERACEAE	SMOOTH LESSINGIA	native	
Lessingia micradenia Greene var. micradenia	ASTERACEAE	TAMALPAIS LESSINGIA	native	
Lessingia nana A. Gray	ASTERACEAE		native	
Lessingia nemaclada Greene	ASTERACEAE		native	
Lessingia ramulosa A. Gray	ASTERACEAE		native	
Lessingia tenuis (A. Gray) Coville	ASTERACEAE	SPRING LESSINGIA	native	
Lessingia virgata A. Gray	ASTERACEAE		native	
Leucanthemum lacustre (Brot.) Samp.	ASTERACEAE		naturalized	
Leucanthemum maximum (Ramond) DC.	ASTERACEAE		naturalized	
Leucanthemum vulgare Lam.	ASTERACEAE	OX-EYE DAISY	naturalized	
Leucocrinum montanum Nutt. ex A. Gray	AGAVACEAE	SAND LILY	native	
Leucothoe davisiae Torr. ex A. Gray	ERICACEAE	SIERRA LAUREL	native	
Lewisia brachycalyx A. Gray	MONTIACEAE	SHORT-SEPALED LEWISIA	native	
Lewisia cantelovii J. T. Howell	MONTIACEAE	CANTELOW'S LEWISIA	native	
Lewisia congdonii (Rydb.) S. Clay	MONTIACEAE	CONGDON'S LEWISIA	native	
Lewisia cotyledon (S. Watson) B. L. Rob.	MONTIACEAE	CLIFF MAIDS	native	
Lewisia cotyledon (S. Watson) B. L. Rob. var. cotyledon	MONTIACEAE		native	
Lewisia cotyledon (S. Watson) B. L. Rob. var. heckneri (C. V. Morton) Munz	MONTIACEAE	HECKNER'S LEWISIA	native	
Lewisia cotyledon (S. Watson) B. L. Rob. var. howellii (S. Watson) Jeps.	MONTIACEAE	HOWELL'S LEWISIA	native	
Lewisia disepala Rydb.	MONTIACEAE	YOSEMITE LEWISIA	native	
Lewisia glandulosa (Rydb.) S. Clay	MONTIACEAE		native	
Lewisia kelloggii K. Brandegee	MONTIACEAE		native	
Lewisia kelloggii K. Brandegee subsp. hutchisonii Dempster	MONTIACEAE		native	
Lewisia kelloggii K. Brandegee subsp. kelloggii	MONTIACEAE		native	
Lewisia leeana (Porter) B. L. Rob.	MONTIACEAE		native	
Lewisia longipetala (Piper) S. Clay	MONTIACEAE	LONG-PETALED LEWISIA	native	
Lewisia nevadensis (A. Gray) B. L. Rob.	MONTIACEAE		native	
Lewisia oppositifolia (S. Watson) B. L. Rob.	MONTIACEAE	OPPOSITE-LEAVED LEWISIA	native	
Lewisia pygmaea (A. Gray) B. L. Rob.	MONTIACEAE		native	
Lewisia rediviva Pursh	MONTIACEAE	BITTER ROOT	native	
Lewisia rediviva Pursh var. minor (Rydb.) Munz	MONTIACEAE		native	
Lewisia rediviva Pursh var. rediviva	MONTIACEAE		native	
Lewisia serrata Heckard & Stebbins	MONTIACEAE		native	
Lewisia stebbinsii Gankin & W. R. Hildreth	MONTIACEAE	STEBBINS' LEWISIA	native	
Lewisia triphylla (S. Watson) B. L. Rob.	MONTIACEAE		native	
Leymus cinereus (Scribn. & Merr.) Á. Löve	POACEAE		native	
Leymus condensatus (C. Presl) Á. Löve	POACEAE		native	
Leymus mollis (Trin.) Pilg.	POACEAE		native	
Leymus mollis (Trin.) Pilg. subsp. mollis	POACEAE		native	
Leymus pacificus (Gould) D. R. Dewey	POACEAE		native	
Leymus salina (M. E. Jones) Á. Löve	POACEAE		native	
Leymus salina (M. E. Jones) Á. Löve subsp. mojavensis Barkworth & R. J. Atkins	POACEAE		native	
Leymus triticoides (Buckley) Pilg.	POACEAE		native	
Ligusticum apiifolium (Nutt.) A. Gray	APIACEAE		native	
Ligusticum californicum J. M. Coult. & Rose	APIACEAE		native	
Ligusticum grayi J. M. Coult. & Rose	APIACEAE		native	
Ligustrum japonicum Thunb.	OLEACEAE		naturalized	
Ligustrum lucidum W. T. Aiton	OLEACEAE		naturalized	
Ligustrum ovalifolium Hassk.	OLEACEAE		naturalized	
Lilaea scilloides (Poir.) Hauman	JUNCAGINACEAE	FLOWERING-QUILLWORT	native	
Lilaeopsis masonii Mathias & Constance	APIACEAE	MASON'S LILAEOPSIS	native	
Lilaeopsis occidentalis J. M. Coult. & Rose	APIACEAE		native	
Lilium bolanderi S. Watson	LILIACEAE	BOLANDER'S LILY	native	
Lilium columbianum Leichtlin	LILIACEAE	COLUMBIA LILY	native	
Lilium humboldtii Roezl & Leichtlin ex Duch.	LILIACEAE	LILY	native	
Lilium humboldtii Roezl & Leichtlin subsp. humboldtii	LILIACEAE	HUMBOLDT LILY	native	
Lilium humboldtii Roezl & Leichtlin subsp. ocellatum (Kellogg) Thorne	LILIACEAE	OCELLATED LILY	native	
Lilium kelleyanum Lemmon	LILIACEAE	LILY	native	
Lilium kelloggii Purdy	LILIACEAE	LILY	native	
Lilium maritimum Kellogg	LILIACEAE	COAST LILY	native	
Lilium occidentale Purdy	LILIACEAE	WESTERN LILY	native	
Lilium pardalinum Kellogg	LILIACEAE	LILY	native	
Lilium pardalinum Kellogg subsp. pardalinum	LILIACEAE	LEOPARD LILY	native	
Lilium pardalinum Kellogg subsp. pitkinense (Beane & Vollmer) M. W. Skinner	LILIACEAE	PITKIN MARSH LILY	native	
Lilium pardalinum Kellogg subsp. shastense (Eastw.) M. W. Skinner	LILIACEAE	LILY	native	
Lilium pardalinum Kellogg subsp. vollmeri (Eastw.) M. W. Skinner	LILIACEAE	VOLLMER'S LILY	native	
Lilium pardalinum Kellogg subsp. wigginsii (Beane & Vollmer) M. W. Skinner	LILIACEAE	WIGGINS' LILY	native	
Lilium parryi S. Watson	LILIACEAE	LEMON LILY	native	
Lilium parvum Kellogg	LILIACEAE	ALPINE LILY	native	
Lilium rubescens S. Watson	LILIACEAE	REDWOOD LILY	native	
Lilium washingtonianum Kellogg	LILIACEAE	WASHINGTON LILY	native	
Lilium washingtonianum Kellogg subsp. purpurascens (Stearn) M. W. Skinner	LILIACEAE	PURPLE-FLOWERED SHASTA LILY	native	
Lilium washingtonianum Kellogg subsp. washingtonianum	LILIACEAE	LILY	native	
Limnanthes alba Benth.	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes alba Benth. subsp. alba	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes alba Benth. subsp. parishii (Jeps.) Morin	LIMNANTHACEAE		native	
Limnanthes alba Benth. subsp. versicolor (Greene) C. T. Mason	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes bakeri J. T. Howell	LIMNANTHACEAE	BAKER'S MEADOWFOAM	native	
Limnanthes douglasii R. Br.	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes douglasii R. Br. subsp. douglasii	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes douglasii R. Br. subsp. nivea (C. T. Mason) C. T. Mason	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes douglasii R. Br. subsp. rosea (Benth.) C. T. Mason	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes douglasii R. Br. subsp. striata (Jeps.) Morin	LIMNANTHACEAE		native	
Limnanthes douglasii R. Br. subsp. sulphurea (C. T. Mason) C. T. Mason	LIMNANTHACEAE	POINT REYES MEADOWFOAM	native	
Limnanthes floccosa Howell	LIMNANTHACEAE	WOOLLY MEADOWFOAM	native	
Limnanthes floccosa Howell subsp. californica Arroyo	LIMNANTHACEAE	SHIPPEE MEADOWFOAM	native	
Limnanthes floccosa Howell subsp. floccosa	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes montana Jeps.	LIMNANTHACEAE	MEADOWFOAM	native	
Limnanthes vinculans Ornduff	LIMNANTHACEAE	SEBASTOPOL MEADOWFOAM	native	
Limnobium spongia (Bosc) Rich. ex Steud.	HYDROCHARITACEAE		naturalized	
Limonium californicum (Boiss.) A. Heller	PLUMBAGINACEAE	WESTERN MARSH-ROSEMARY	native	
Limonium otolepis (Schrenk) Kuntze	PLUMBAGINACEAE	MARSH-ROSEMARY; SEA-LAVENDER	naturalized	
Limonium perezii (Stapf) F. T. Hubb.	PLUMBAGINACEAE	MARSH-ROSEMARY; SEA-LAVENDER	naturalized	
Limonium ramosissimum (Poir.) Maire	PLUMBAGINACEAE		naturalized	
Limonium ramosissimum (Poir.) Maire subsp. provinciale (Pignatti) Pignatti	PLUMBAGINACEAE		naturalized	
Limonium sinuatum (L.) Mill.	PLUMBAGINACEAE	MARSH-ROSEMARY; SEA-LAVENDER	naturalized	
Limosella acaulis Sessé & Moc.	SCROPHULARIACEAE	MUDWORT	native	
Limosella aquatica L.	SCROPHULARIACEAE	MUDWORT	native	
Limosella subulata E. Ives	SCROPHULARIACEAE	MUDWORT	naturalized	
Linanthus arenicola (M. E. Jones) Jeps. & V. L. Bailey	POLEMONIACEAE	SAND LINANTHUS	native	
Linanthus bellus (A. Gray) Greene	POLEMONIACEAE	DESERT BEAUTY	native	
Linanthus bigelovii (A. Gray) Greene	POLEMONIACEAE		native	
Linanthus californicus (Hook. & Arn.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linanthus campanulatus (A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linanthus concinnus Milliken	POLEMONIACEAE	SAN GABRIEL LINANTHUS	native	
Linanthus demissus (A. Gray) Greene	POLEMONIACEAE		native	
Linanthus dianthiflorus (Benth.) Greene	POLEMONIACEAE		native	
Linanthus dichotomus Benth.	POLEMONIACEAE	EVENING SNOW	native	
Linanthus dichotomus Benth. subsp. dichotomus	POLEMONIACEAE		native	
Linanthus dichotomus Benth. subsp. meridianus (Eastw.) H. Mason	POLEMONIACEAE		native	
Linanthus filiformis (Parry ex A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linanthus inyoensis (I. M. Johnst.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linanthus jaegeri (Munz) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linanthus jonesii (A. Gray) Greene	POLEMONIACEAE		native	
Linanthus killipii H. Mason	POLEMONIACEAE	BALDWIN LAKE LINANTHUS	native	
Linanthus maculatus (Parish) Milliken	POLEMONIACEAE		native	
Linanthus orcuttii (Parry & A. Gray) Jeps.	POLEMONIACEAE	ORCUTT'S LINANTHUS	native	
Linanthus parryae (A. Gray) Greene	POLEMONIACEAE		native	
Linanthus pungens (Torr.) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	
Linaria bipartita Willd.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria canadensis (L.) Chaz.	PLANTAGINACEAE	BLUE TOADFLAX	native	
Linaria genistifolia (L.) Mill.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria genistifolia (L.) Mill. subsp. dalmatica (L.) Maire & Petitm.	PLANTAGINACEAE	DALMATIAN TOADFLAX	naturalized	
Linaria maroccana Hook. f.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria pinifolia (Poir.) Thell.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria purpurea (L.) Mill.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria supina (L.) Chaz.	PLANTAGINACEAE	TOADFLAX	naturalized	
Linaria vulgaris Mill.	PLANTAGINACEAE	BUTTER-AND-EGGS	naturalized	
Lindernia dubia (L.) Pennell	PLANTAGINACEAE	FALSE PIMPERNEL	native	
Lindernia dubia (L.) Pennell var. anagallidea (Michx.) Cooperr.	PLANTAGINACEAE	FALSE PIMPERNEL	native	
Lindernia dubia (L.) Pennell var. dubia	PLANTAGINACEAE	FALSE PIMPERNEL	native	
Linnaea borealis L.	LINNAEACEAE	TWIN FLOWER	native	
Linnaea borealis L. var. longiflora Torr.	LINNAEACEAE	TWIN FLOWER	native	
Linum bienne Mill.	LINACEAE	FLAX	naturalized	
Linum grandiflorum Desf.	LINACEAE	FLAX	naturalized	
Linum lewisii Pursh	LINACEAE	FLAX	native	
Linum lewisii Pursh var. alpicola Jeps.	LINACEAE	FLAX	native	
Linum lewisii Pursh var. lewisii	LINACEAE	FLAX	native	
Linum puberulum (Engelm.) A. Heller	LINACEAE	FLAX	native	
Linum trigynum L.	LINACEAE		naturalized	acceptance uncertain
Linum usitatissimum L.	LINACEAE	COMMON FLAX	naturalized	
Lipocarpha aristulata (Coville) G. C. Tucker	CYPERACEAE		native	
Lipocarpha micrantha (Vahl) G. C. Tucker	CYPERACEAE		native	
Lipocarpha occidentalis (A. Gray) G. C. Tucker	CYPERACEAE		native	
Listera banksiana Lindl.	ORCHIDACEAE		native	
Listera convallarioides (Sw.) Nutt.	ORCHIDACEAE	BROAD-LEAVED TWAYBLADE	native	
Listera cordata (L.) R. Br.	ORCHIDACEAE	HEART-LEAVED TWAYBLADE	native	
Lithophragma affine A. Gray	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma bolanderi A. Gray	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma campanulatum Howell	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma cymbalaria Torr. & A. Gray	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma glabrum Nutt.	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma heterophyllum (Hook. & Arn.) Torr. & A. Gray	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma maximum Bacig.	SAXIFRAGACEAE	SAN CLEMENTE ISLAND WOODLAND STAR	native	
Lithophragma parviflorum (Hook.) Torr. & A. Gray	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma parviflorum (Hook.) Torr. & A. Gray var. parviflorum	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma parviflorum (Hook.) Torr. & A. Gray var. trifoliatum (Eastw.) Jeps.	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithophragma tenellum Nutt.	SAXIFRAGACEAE	WOODLAND STAR	native	
Lithospermum arvense L.	BORAGINACEAE	GROMWELL	naturalized	
Lithospermum californicum A. Gray	BORAGINACEAE	STONESEED	native	
Lithospermum incisum Lehm.	BORAGINACEAE	STONESEED	native	
Lithospermum ruderale Lehm.	BORAGINACEAE	STONESEED	native	
Lobelia cardinalis L.	CAMPANULACEAE		native	
Lobelia cardinalis L. var. pseudosplendens McVaugh	CAMPANULACEAE	CARDINAL FLOWER	native	
Lobelia dunnii Greene	CAMPANULACEAE		native	
Lobelia dunnii Greene var. serrata (A. Gray) McVaugh	CAMPANULACEAE		native	
Lobularia maritima (L.) Desv.	BRASSICACEAE	SWEET ALYSSUM	naturalized	
Loeflingia squarrosa Nutt.	CARYOPHYLLACEAE		native	
Loeseliastrum depressum (M. E. Jones ex A. Gray) J. M. Porter & L. A. Johnson	POLEMONIACEAE		native	acceptance uncertain
Loeseliastrum matthewsii (A. Gray) Timbrook	POLEMONIACEAE	DESERT CALICO	native	
Loeseliastrum schottii (Torr.) Timbrook	POLEMONIACEAE		native	
Logfia arizonica (A. Gray) Holub	ASTERACEAE		native	
Logfia depressa (A. Gray) Holub	ASTERACEAE		native	
Logfia filaginoides (Hook. & Arn.) Morefield	ASTERACEAE		native	
Logfia gallica (L.) Coss. & Germ.	ASTERACEAE		naturalized	
Lolium multiflorum Lam.	POACEAE	ITALIAN RYEGRASS	naturalized	
Lolium perenne L.	POACEAE	PERENNIAL RYEGRASS	naturalized	
Lolium temulentum L.	POACEAE	DARNEL	naturalized	
Lomatium bicolor (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Lomatium bicolor (S. Watson) J. M. Coult. & Rose var. leptocarpum (Torr. & A. Gray) Schlessman	APIACEAE		native	
Lomatium californicum (Nutt.) Mathias & Constance	APIACEAE		native	
Lomatium canbyi (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium caruifolium (Hook. & Arn.) J. M. Coult. & Rose	APIACEAE		native	
Lomatium caruifolium (Hook. & Arn.) J. M. Coult. & Rose var. caruifolium	APIACEAE		native	
Lomatium caruifolium (Hook. & Arn.) J. M. Coult. & Rose var. denticulatum Jeps.	APIACEAE		native	
Lomatium ciliolatum Jeps.	APIACEAE		native	
Lomatium ciliolatum Jeps. var. ciliolatum	APIACEAE		native	
Lomatium congdonii J. M. Coult. & Rose	APIACEAE	CONGDON'S LOMATIUM	native	
Lomatium dasycarpum (Torr. & A. Gray) J. M. Coult. & Rose	APIACEAE		native	
Lomatium dasycarpum (Torr. & A. Gray) J. M. Coult. & Rose subsp. dasycarpum	APIACEAE		native	
Lomatium dasycarpum (Torr. & A. Gray) J. M. Coult. & Rose subsp. tomentosum (Benth.) Theob.	APIACEAE		native	
Lomatium dissectum (Nutt.) Mathias & Constance	APIACEAE		native	
Lomatium dissectum (Nutt.) Mathias & Constance var. dissectum	APIACEAE		native	
Lomatium dissectum (Nutt.) Mathias & Constance var. multifidum (Nutt.) Mathias & Constance	APIACEAE		native	
Lomatium engelmannii Mathias	APIACEAE	ENGELMANN'S LOMATIUM	native	
Lomatium foeniculaceum (Nutt.) J. M. Coult. & Rose	APIACEAE		native	
Lomatium foeniculaceum (Nutt.) J. M. Coult. & Rose subsp. fimbriatum W. L. Theob.	APIACEAE		native	
Lomatium foeniculaceum (Nutt.) J. M. Coult. & Rose subsp. inyoense (Mathias & Constance ex Munz & J. C. Roos) W. L. Theob.	APIACEAE	INYO LOMATIUM	native	
Lomatium grayi (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium hallii (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Lomatium hendersonii (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium hooveri (Mathias & Constance) Constance & Ertter	APIACEAE		native	
Lomatium howellii (S. Watson) Jeps.	APIACEAE	HOWELL'S LOMATIUM	native	
Lomatium insulare (Eastw.) Munz	APIACEAE	SAN NICOLAS ISLAND LOMATIUM	native	
Lomatium lucidum (Torr. & A. Gray) Jeps.	APIACEAE		native	
Lomatium macrocarpum (Torr. & A. Gray) J. M. Coult. & Rose	APIACEAE		native	
Lomatium marginatum (Benth.) J. M. Coult. & Rose	APIACEAE		native	
Lomatium marginatum (Benth.) J. M. Coult. & Rose var. marginatum	APIACEAE		native	
Lomatium marginatum (Benth.) J. M. Coult. & Rose var. purpureum (Jeps.) Jeps.	APIACEAE		native	
Lomatium martindalei (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE	COAST RANGE LOMATIUM	native	
Lomatium mohavense (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium nevadense (S. Watson) J. M. Coult. & Rose	APIACEAE		native	
Lomatium nevadense (S. Watson) J. M. Coult. & Rose var. nevadense	APIACEAE		native	
Lomatium nevadense (S. Watson) J. M. Coult. & Rose var. parishii (J. M. Coult. & Rose) Jeps.	APIACEAE		native	
Lomatium nudicaule (Pursh) J. M. Coult. & Rose	APIACEAE		native	
Lomatium observatorium Constance & Ertter	APIACEAE		native	
Lomatium parryi (S. Watson) J. F. Macbr.	APIACEAE		native	
Lomatium parvifolium (Hook. & Arn.) Jeps.	APIACEAE	SMALL-LEAVED LOMATIUM	native	
Lomatium peckianum Mathias & Constance	APIACEAE	PECK'S LOMATIUM	native	
Lomatium piperi J. M. Coult. & Rose	APIACEAE		native	
Lomatium plummerae (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium ravenii Mathias & Constance	APIACEAE	RAVEN'S LOMATIUM	native	
Lomatium repostum (Jeps.) Mathias	APIACEAE	NAPA LOMATIUM	native	
Lomatium rigidum (M. E. Jones) Jeps.	APIACEAE	STIFF LOMATIUM	native	
Lomatium shevockii R. L. Hartm. & Constance	APIACEAE	OWENS PEAK LOMATIUM	native	
Lomatium stebbinsii M. Schlessman & Constance	APIACEAE	STEBBINS' LOMATIUM	native	
Lomatium torreyi (J. M. Coult. & Rose) J. M. Coult. & Rose	APIACEAE		native	
Lomatium tracyi Mathias & Constance	APIACEAE	TRACY'S LOMATIUM	native	
Lomatium triternatum (Pursh) J. M. Coult. & Rose	APIACEAE		native	
Lomatium triternatum (Pursh) J. M. Coult. & Rose var. macrocarpum (J. M. Coult. & Rose) Mathias	APIACEAE		native	
Lomatium triternatum (Pursh) J. M. Coult. & Rose var. triternatum	APIACEAE		native	
Lomatium utriculatum (Nutt. ex Torr. & A. Gray) J. M. Coult. & Rose	APIACEAE		native	
Lomatium vaginatum J. M. Coult. & Rose	APIACEAE		native	
Lonicera cauriana Fernald	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera ciliosa (Pursh) Poir.	CAPRIFOLIACEAE	ORANGE HONEYSUCKLE	native	
Lonicera conjugialis Kellogg	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera etrusca Santi	CAPRIFOLIACEAE	HONEYSUCKLE	naturalized	
Lonicera hispidula (Lindl.) Douglas ex Torr. & A. Gray	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera interrupta Benth.	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera involucrata (Richardson) Banks ex Spreng.	CAPRIFOLIACEAE	TWINBERRY	native	
Lonicera involucrata (Richardson) Banks ex Spreng. var. involucrata	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera involucrata (Richardson) Banks ex Spreng. var. ledebourii (Eschsch.) Jeps.	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera japonica Thunb. ex Murray	CAPRIFOLIACEAE	JAPANESE HONEYSUCKLE	naturalized	
Lonicera subspicata Hook. & Arn.	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera subspicata Hook. & Arn. var. denudata Rehder	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera subspicata Hook. & Arn. var. subspicata	CAPRIFOLIACEAE	HONEYSUCKLE	native	
Lonicera tatarica L.	CAPRIFOLIACEAE	HONEYSUCKLE	naturalized	
Lotus aboriginus Jeps.	FABACEAE		native	
Lotus angustissimus L.	FABACEAE		naturalized	
Lotus argophyllus (A. Gray) Greene	FABACEAE		native	
Lotus argophyllus (A. Gray) Greene var. adsurgens Dunkle	FABACEAE	SAN CLEMENTE ISLAND BIRD'S-FOOT TREFOIL	native	
Lotus argophyllus (A. Gray) Greene var. argenteus Dunkle	FABACEAE		native	
Lotus argophyllus (A. Gray) Greene var. argophyllus	FABACEAE		native	
Lotus argophyllus (A. Gray) Greene var. fremontii (A. Gray) Ottley	FABACEAE		native	
Lotus argophyllus (A. Gray) Greene var. niveus (Greene) Ottley	FABACEAE	SANTA CRUZ ISLAND BIRD'S-FOOT TREFOIL	native	
Lotus argyraeus (Greene) Greene	FABACEAE		native	
Lotus argyraeus (Greene) Greene var. argyraeus	FABACEAE		native	
Lotus argyraeus (Greene) Greene var. multicaulis (Ottley) Isely	FABACEAE		native	
Lotus argyraeus (Greene) Greene var. notitius Isely	FABACEAE		native	
Lotus benthamii Greene	FABACEAE		native	
Lotus corniculatus L.	FABACEAE	BIRDFOOT TREFOIL	naturalized	
Lotus crassifolius (Benth.) Greene	FABACEAE		native	
Lotus crassifolius (Benth.) Greene var. crassifolius	FABACEAE		native	
Lotus crassifolius (Benth.) Greene var. otayensis Isely	FABACEAE	OTAY MOUNTAIN LOTUS	native	
Lotus dendroideus (Greene) Greene	FABACEAE		native	
Lotus dendroideus (Greene) Greene var. dendroideus	FABACEAE	ISLAND BROOM	native	
Lotus dendroideus (Greene) Greene var. traskiae (Noddin) Isely	FABACEAE	TRASK'S ISLAND LOTUS	native	
Lotus dendroideus (Greene) Greene var. veatchii (Greene) Isely	FABACEAE	SAN MIGUEL ISLAND DEERWEED	native	
Lotus denticulatus (Drew) Greene	FABACEAE		native	
Lotus formosissimus Greene	FABACEAE		native	
Lotus grandiflorus (Benth.) Greene	FABACEAE		native	
Lotus grandiflorus (Benth.) Greene var. grandiflorus	FABACEAE		native	
Lotus grandiflorus (Benth.) Greene var. macranthus (Greene) Isely	FABACEAE		native	
Lotus hamatus Greene	FABACEAE		native	
Lotus haydonii (Orcutt) Greene	FABACEAE	HAYDON'S LOTUS	native	
Lotus heermannii (Durand & Hilg.) Greene	FABACEAE		native	
Lotus heermannii (Durand & Hilg.) Greene var. heermannii	FABACEAE		native	
Lotus heermannii (Durand & Hilg.) Greene var. orbicularis (A. Gray) Isely	FABACEAE		native	
Lotus humistratus Greene	FABACEAE		native	
Lotus incanus (Torr.) Greene	FABACEAE		native	
Lotus junceus (Benth.) Greene	FABACEAE		native	
Lotus junceus (Benth.) Greene var. biolettii (Greene) Ottley	FABACEAE		native	
Lotus junceus (Benth.) Greene var. junceus	FABACEAE		native	
Lotus micranthus Benth.	FABACEAE		native	
Lotus nevadensis (S. Watson) Greene	FABACEAE		native	
Lotus nevadensis (S. Watson) Greene var. davidsonii (Greene) Isely	FABACEAE		native	
Lotus nevadensis (S. Watson) Greene var. nevadensis	FABACEAE		native	
Lotus nuttallianus Greene	FABACEAE	NUTTALL'S LOTUS	native	
Lotus oblongifolius (Benth.) Greene	FABACEAE		native	
Lotus oblongifolius (Benth.) Greene var. cupreus (Greene) Ottley	FABACEAE	COPPER-FLOWERED BIRD'S-FOOT TREFOIL	native	
Lotus oblongifolius (Benth.) Greene var. oblongifolius	FABACEAE		native	
Lotus pinnatus Hook.	FABACEAE		native	
Lotus procumbens (Greene) Greene	FABACEAE		native	
Lotus procumbens (Greene) Greene var. jepsonii (Ottley) Ottley	FABACEAE		native	
Lotus procumbens (Greene) Greene var. procumbens	FABACEAE		native	
Lotus purshianus Clem. & E. G. Clem.	FABACEAE		native	acceptance uncertain
Lotus purshianus Clem. & E. G. Clem. var. purshianus	FABACEAE		native	acceptance uncertain
Lotus rigidus (Benth.) Greene	FABACEAE		native	
Lotus rubriflorus Sharsm.	FABACEAE	RED-FLOWERED BIRD'S-FOOT TREFOIL	native	
Lotus salsuginosus Greene	FABACEAE		native	
Lotus salsuginosus Greene var. brevivexillus Ottley	FABACEAE		native	
Lotus salsuginosus Greene var. salsuginosus	FABACEAE		native	
Lotus scoparius (Torr. & A. Gray) Ottley	FABACEAE	CALIFORNIA BROOM	native	
Lotus scoparius (Torr. & A. Gray) Ottley var. brevialatus Ottley	FABACEAE		native	
Lotus scoparius (Torr. & A. Gray) Ottley var. scoparius	FABACEAE		native	
Lotus stipularis (Benth.) Greene	FABACEAE		native	
Lotus stipularis (Benth.) Greene var. ottleyi Isely	FABACEAE		native	
Lotus stipularis (Benth.) Greene var. stipularis	FABACEAE		native	
Lotus strigosus (Nutt.) Greene	FABACEAE		native	
Lotus uliginosus Schkuhr	FABACEAE		naturalized	acceptance uncertain
Lotus wrangelianus Fisch. & C. A. Mey.	FABACEAE		native	acceptance uncertain
Lotus yollabolliensis Munz	FABACEAE	YOLLA BOLLY MOUNTAINS BIRD'S-FOOT TREFOIL	native	
Ludwigia hexapetala (Hook. & Arn.) Zardini, H. Gu & P. H. Raven	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	native	
Ludwigia palustris (L.) Elliott	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	native	
Ludwigia peploides (Kunth) P. H. Raven	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	native	
Ludwigia peploides (Kunth) P. H. Raven subsp. montevidensis (Spreng.) P. H. Raven	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	naturalized	
Ludwigia peploides (Kunth) P. H. Raven subsp. peploides	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	native	
Ludwigia repens J. R. Forst.	ONAGRACEAE	FALSE LOOSESTRIFE; WATER PRIMROSE	native	
Luetkea pectinata (Pursh) Kuntze	ROSACEAE		native	
Luina hypoleuca Benth.	ASTERACEAE		native	
Lunaria annua L.	BRASSICACEAE	MOONWORT	naturalized	
Lupinus adsurgens Drew	FABACEAE	LUPINE	native	
Lupinus affinis J. Agardh	FABACEAE	LUPINE	native	
Lupinus albicaulis Douglas	FABACEAE	LUPINE	native	
Lupinus albifrons Benth.	FABACEAE	LUPINE	native	
Lupinus albifrons Lindl. var. abramsii (C. P. Sm.) Hoover	FABACEAE	ABRAMS' LUPINE	native	
Lupinus albifrons Lindl. var. albifrons	FABACEAE	LUPINE	native	
Lupinus albifrons Lindl. var. collinus Greene	FABACEAE	LUPINE	native	
Lupinus albifrons Lindl. var. douglasii (J. Agardh) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus andersonii S. Watson	FABACEAE	LUPINE	native	
Lupinus angustiflorus Eastw.	FABACEAE	LUPINE	native	
Lupinus antoninus Eastw.	FABACEAE	ANTHONY PEAK LUPINE	native	
Lupinus apertus A. Heller	FABACEAE	LUPINE	native	
Lupinus arboreus Sims	FABACEAE	YELLOW BUSH LUPINE	native	
Lupinus arbustus Douglas	FABACEAE	SPUR LUPINE	native	
Lupinus argenteus Pursh	FABACEAE	LUPINE	native	
Lupinus argenteus Pursh var. argenteus	FABACEAE	LUPINE	native	
Lupinus argenteus Pursh var. heteranthus (S. Watson) Barneby	FABACEAE	LUPINE	native	
Lupinus argenteus Pursh var. holosericeus (Nutt.) Barneby	FABACEAE		native	acceptance uncertain
Lupinus argenteus Pursh var. meionanthus (A. Gray) Barneby	FABACEAE	LUPINE	native	
Lupinus argenteus Pursh var. montigenus (A. Heller) Barneby	FABACEAE	LUPINE	native	
Lupinus argenteus Pursh var. palmeri (S. Watson) Barneby	FABACEAE	LUPINE	native	
Lupinus arizonicus (S. Watson) S. Watson	FABACEAE	ARIZONA LUPINE	native	
Lupinus benthamii A. Heller	FABACEAE	SPIDER LUPINE	native	
Lupinus bicolor Lindl.	FABACEAE	MINIATURE LUPINE	native	
Lupinus brevicaulis S. Watson	FABACEAE	SAND LUPINE	native	
Lupinus breweri A. Gray	FABACEAE	LUPINE	native	
Lupinus breweri A. Gray var. breweri	FABACEAE	LUPINE	native	
Lupinus breweri A. Gray var. bryoides C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus breweri A. Gray var. grandiflorus C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus cervinus Kellogg	FABACEAE	SANTA LUCIA LUPINE	native	
Lupinus chamissonis Eschsch.	FABACEAE	LUPINE	native	
Lupinus citrinus Kellogg	FABACEAE	LUPINE	native	
Lupinus citrinus Kellogg var. citrinus	FABACEAE	ORANGE LUPINE	native	
Lupinus citrinus Kellogg var. deflexus (Congdon) Jeps.	FABACEAE	MARIPOSA LUPINE	native	
Lupinus concinnus J. Agardh	FABACEAE	BAJADA LUPINE	native	
Lupinus constancei T. W. Nelson & J. P. Nelson	FABACEAE	THE LASSICS LUPINE	native	
Lupinus covillei Greene	FABACEAE	LUPINE	native	
Lupinus croceus Eastw.	FABACEAE	LUPINE	native	
Lupinus dalesiae Eastw.	FABACEAE	QUINCY LUPINE	native	
Lupinus duranii Eastw.	FABACEAE	MONO LAKE LUPINE	native	
Lupinus elatus I. M. Johnst.	FABACEAE	SILKY LUPINE	native	
Lupinus elmeri Greene	FABACEAE	LUPINE	native	
Lupinus excubitus M. E. Jones	FABACEAE	GRAPE SODA LUPINE	native	
Lupinus excubitus M. E. Jones var. austromontanus (A. Heller) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus excubitus M. E. Jones var. excubitus	FABACEAE	LUPINE	native	
Lupinus excubitus M. E. Jones var. hallii (Abrams) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus excubitus M. E. Jones var. johnstonii C. P. Sm.	FABACEAE	INTERIOR BUSH LUPINE	native	
Lupinus excubitus M. E. Jones var. medius (Jeps.) Munz	FABACEAE	MOUNTAIN SPRINGS BUSH LUPINE	native	
Lupinus flavoculatus A. Heller	FABACEAE	LUPINE	native	
Lupinus formosus Greene	FABACEAE	LUPINE	native	
Lupinus formosus Greene var. formosus	FABACEAE	LUPINE	native	
Lupinus formosus Greene var. robustus C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus fulcratus Greene	FABACEAE	LUPINE	native	
Lupinus gracilentus Greene	FABACEAE	SLENDER LUPINE	native	
Lupinus grayi S. Watson	FABACEAE	LUPINE	native	
Lupinus guadalupensis Greene	FABACEAE	GUADALUPE ISLAND LUPINE	native	
Lupinus hirsutissimus Benth.	FABACEAE	STINGING LUPINE	native	
Lupinus holmgrenianus C. P. Sm.	FABACEAE	HOLMGREN'S LUPINE	native	
Lupinus hyacinthinus Greene	FABACEAE	LUPINE	native	
Lupinus lapidicola A. Heller	FABACEAE	MOUNT EDDY LUPINE	native	
Lupinus latifolius J. Agardh	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. barbatus (L. F. Hend.) Munz	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. columbianus (A. Heller) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. dudleyi C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. latifolius	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. parishii C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus latifolius J. Agardh var. viridifolius (A. Heller) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus lepidus Douglas ex Lindl.	FABACEAE	DWARF LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. confertus (Kellogg) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. culbertsonii (Greene) C. P. Sm.	FABACEAE	HOCKETT MEADOWS LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. lobbii (S. Watson) C. L. Hitchc.	FABACEAE	LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. ramosus Jeps.	FABACEAE	LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. sellulus (Kellogg) Barneby	FABACEAE	LUPINE	native	
Lupinus lepidus Douglas ex Lindl. var. utahensis (S. Watson) C. L. Hitchc.	FABACEAE	LUPINE	native	
Lupinus leucophyllus Douglas ex Lindl.	FABACEAE	LUPINE	native	
Lupinus littoralis Douglas	FABACEAE	LUPINE	native	
Lupinus longifolius (S. Watson) Abrams	FABACEAE	LUPINE	native	
Lupinus ludovicianus Greene	FABACEAE	SAN LUIS OBISPO COUNTY LUPINE	native	
Lupinus luteolus Kellogg	FABACEAE	BUTTER LUPINE	native	
Lupinus magnificus M. E. Jones	FABACEAE	PANAMINT MOUNTAINS LUPINE	native	
Lupinus microcarpus Sims	FABACEAE	CHICK LUPINE	native	
Lupinus microcarpus Sims var. densiflorus (Benth.) Jeps.	FABACEAE	LUPINE	native	
Lupinus microcarpus Sims var. horizontalis (A. Heller) Jeps.	FABACEAE	LUPINE	native	
Lupinus microcarpus Sims var. microcarpus	FABACEAE	LUPINE	native	
Lupinus nanus Benth.	FABACEAE	LUPINE	native	
Lupinus nevadensis A. Heller	FABACEAE	LUPINE	native	
Lupinus nipomensis Eastw.	FABACEAE	NIPOMO MESA LUPINE	native	
Lupinus obtusilobus A. Heller	FABACEAE	LUPINE	native	
Lupinus odoratus A. Heller	FABACEAE	MOJAVE LUPINE	native	
Lupinus onustus S. Watson	FABACEAE	LUPINE	native	
Lupinus pachylobus Greene	FABACEAE	BIG POD LUPINE	native	
Lupinus padre-crowleyi C. P. Sm.	FABACEAE	FATHER CROWLEY'S LUPINE	native	
Lupinus peirsonii H. Mason	FABACEAE	PEIRSON'S LUPINE	native	
Lupinus polyphyllus Lindl.	FABACEAE	LUPINE	native	
Lupinus polyphyllus Lindl. var. burkei (S. Watson) C. L. Hitchc.	FABACEAE	LUPINE	native	
Lupinus polyphyllus Lindl. var. pallidipes (A. Heller) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus polyphyllus Lindl. var. polyphyllus	FABACEAE	LUPINE	native	
Lupinus pratensis A. Heller	FABACEAE	LUPINE	native	
Lupinus pratensis A. Heller var. eriostachyus C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus pratensis A. Heller var. pratensis	FABACEAE	LUPINE	native	
Lupinus prunophilus M. E. Jones	FABACEAE		native	acceptance uncertain
Lupinus pusillus Pursh	FABACEAE	LUPINE	native	
Lupinus pusillus Pursh var. intermontanus (A. Heller) C. P. Sm.	FABACEAE	LUPINE	native	
Lupinus rivularis Douglas ex Lindl.	FABACEAE	LUPINE	native	
Lupinus saxosus Howell	FABACEAE	LUPINE	native	
Lupinus sericatus Kellogg	FABACEAE	COBB MOUNTAIN LUPINE	native	
Lupinus shockleyi S. Watson	FABACEAE	DESERT LUPINE	native	
Lupinus sparsiflorus Benth.	FABACEAE	COULTER'S LUPINE	native	
Lupinus spectabilis Hoover	FABACEAE	SHAGGYHAIR LUPINE	native	
Lupinus stiversii Kellogg	FABACEAE	HARLEQUIN LUPINE	native	
Lupinus succulentus K. Koch	FABACEAE	ARROYO LUPINE	native	
Lupinus tidestromii Greene	FABACEAE	TIDESTROM'S LUPINE	native	
Lupinus tracyi Eastw.	FABACEAE	TRACY'S LUPINE	native	
Lupinus truncatus Nutt.	FABACEAE	LUPINE	native	
Lupinus uncialis S. Watson	FABACEAE		native	
Lupinus variicolor Steud.	FABACEAE	LUPINE	native	
Luzula comosa E. Mey.	JUNCACEAE	HAIRY WOOD RUSH	native	
Luzula divaricata S. Watson	JUNCACEAE	HAIRY WOOD RUSH	native	
Luzula orestera Sharsm.	JUNCACEAE	HAIRY WOOD RUSH	native	
Luzula parviflora (Ehrh.) Desv.	JUNCACEAE	HAIRY WOOD RUSH	native	
Luzula spicata (L.) DC.	JUNCACEAE	HAIRY WOOD RUSH	native	
Luzula subcongesta (S. Watson) Jeps.	JUNCACEAE	HAIRY WOOD RUSH	native	
Lychnis coronaria (L.) Desr.	CARYOPHYLLACEAE	MULLEIN PINK; ROSE CAMPION	naturalized	
Lycium andersonii A. Gray	SOLANACEAE	BOX THORN	native	
Lycium barbarum L.	SOLANACEAE	MATRIMONY VINE	naturalized	
Lycium brevipes Benth.	SOLANACEAE	BOX THORN	native	
Lycium brevipes Benth. var. brevipes	SOLANACEAE	BOX THORN	native	
Lycium brevipes Benth. var. hassei (Greene) C. L. Hitchc.	SOLANACEAE	SANTA CATALINA ISLAND DESERT-THORN	native	
Lycium californicum Nutt.	SOLANACEAE	BOX THORN	native	
Lycium cooperi A. Gray	SOLANACEAE	BOX THORN	native	
Lycium ferocissimum Miers	SOLANACEAE		naturalized	acceptance uncertain
Lycium fremontii A. Gray	SOLANACEAE	BOX THORN	native	
Lycium pallidum Miers	SOLANACEAE	BOX THORN	native	
Lycium pallidum Miers var. oligospermum C. L. Hitchc.	SOLANACEAE	BOX THORN	native	
Lycium parishii A. Gray	SOLANACEAE	PARISH'S DESERT-THORN	native	
Lycium torreyi A. Gray	SOLANACEAE	BOX THORN	native	
Lycopersicon esculentum Mill.	SOLANACEAE	TOMATO	naturalized	
Lycopersicon peruvianum (L.) Mill.	SOLANACEAE	TOMATO	naturalized	
Lycopodiella inundata (L.) Holub	LYCOPODIACEAE	BOG CLUB-MOSS	native	
Lycopodium clavatum L.	LYCOPODIACEAE	RUNNING-PINE	native	
Lycopus americanus W. P. C. Barton	LAMIACEAE	BUGLEWEED	native	
Lycopus asper Greene	LAMIACEAE	BUGLEWEED	native	
Lycopus uniflorus Michx.	LAMIACEAE	NORTHERN BUGLEWEED	native	
Lyonothamnus floribundus A. Gray	ROSACEAE	CATALINA IRONWOOD	native	
Lyonothamnus floribundus A. Gray subsp. aspleniifolius (Greene) P. H. Raven	ROSACEAE	FERN-LEAVED CATALINA IRONWOOD	native	
Lyonothamnus floribundus A. Gray subsp. floribundus	ROSACEAE	SANTA CATALINA ISLAND IRONWOOD	native	
Lyrocarpa coulteri Hook. & Harv.	BRASSICACEAE		native	
Lyrocarpa coulteri Hook. & Harv. var. palmeri (S. Watson) Rollins	BRASSICACEAE	COULTER'S LYREPOD	native	
Lysichiton americanus Hultén & H. St. John	ARACEAE	YELLOW SKUNK CABBAGE	native	
Lysimachia nummularia L.	MYRSINACEAE	MONEYWORT	naturalized	
Lysimachia thyrsiflora L.	MYRSINACEAE	TUFTED LOOSESTRIFE	native	
Lythrum californicum Torr. & A. Gray	LYTHRACEAE	CALIFORNIA LOOSESTRIFE	native	
Lythrum hyssopifolia L.	LYTHRACEAE		naturalized	
Lythrum portula (L.) D. A. Webb	LYTHRACEAE		naturalized	
Lythrum salicaria L.	LYTHRACEAE	PURPLE LOOSESTRIFE	naturalized	
Lythrum tribracteatum Salzm. ex Spreng.	LYTHRACEAE		naturalized	
Machaeranthera tanacetifolia (Kunth) Nees	ASTERACEAE		native	
Maclura pomifera (Raf.) C. K. Schneid.	MORACEAE	OSAGE ORANGE	naturalized	
Madia anomala Greene	ASTERACEAE	TARWEED	native	
Madia citrigracilis D. D. Keck	ASTERACEAE	TARWEED	native	
Madia citriodora Greene	ASTERACEAE	LEMON-SCENTED TARWEED	native	
Madia elegans D. Don	ASTERACEAE	COMMON MADIA	native	
Madia exigua (Sm.) A. Gray	ASTERACEAE	THREADSTEM MADIA	native	
Madia glomerata Hook.	ASTERACEAE	MOUNTAIN TARWEED	native	
Madia gracilis (Sm.) D. D. Keck & J. C. Clausen ex Applegate	ASTERACEAE	SLENDER TARWEED	native	
Madia radiata Kellogg	ASTERACEAE	SHOWY MADIA	native	
Madia sativa Molina	ASTERACEAE	COAST TARWEED	native	
Madia subspicata D. D. Keck	ASTERACEAE	TARWEED	native	
Maianthemum dilatatum (A. W. Wood) A. Nelson & J. F. Macbr.	RUSCACEAE	FALSE LILY-OF-THE-VALLEY	native	
Maianthemum racemosum (L.) Link	RUSCACEAE		native	
Maianthemum stellatum (L.) Link	RUSCACEAE		native	
Malacothamnus abbottii (Eastw.) Kearney	MALVACEAE	ABBOTT'S BUSH MALLOW	native	
Malacothamnus aboriginum (B. L. Rob.) Greene	MALVACEAE	INDIAN VALLEY BUSH MALLOW	native	
Malacothamnus clementinus (Munz & I. M. Johnst.) Kearney	MALVACEAE	SAN CLEMENTE ISLAND BUSH MALLOW	native	
Malacothamnus davidsonii (B. L. Rob.) Greene	MALVACEAE	DAVIDSON'S BUSH MALLOW	native	
Malacothamnus densiflorus (S. Watson) Greene	MALVACEAE	BUSH MALLOW	native	
Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene	MALVACEAE	CHAPARRAL MALLOW	native	
Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene var. fasciculatus	MALVACEAE		native	
Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene var. nesioticus (B. L. Rob.) Kearney	MALVACEAE		native	
Malacothamnus fasciculatus (Nutt. ex Torr. & A. Gray) Greene var. nuttallii (Abrams) Kearney	MALVACEAE		native	
Malacothamnus fremontii (Torr. ex A. Gray) Greene	MALVACEAE	BUSH MALLOW	native	
Malacothamnus hallii (Eastw.) Kearney	MALVACEAE		native	
Malacothamnus jonesii (Munz) Kearney	MALVACEAE	JONES' BUSH MALLOW	native	
Malacothamnus marrubioides (Durand & Hilg.) Greene	MALVACEAE	BUSH MALLOW	native	
Malacothamnus orbiculatus (Greene) Greene	MALVACEAE		native	
Malacothamnus palmeri (S. Watson) Greene	MALVACEAE	SANTA LUCIA BUSH MALLOW	native	
Malacothamnus palmeri (S. Watson) Greene var. involucratus (B. L. Rob.) Kearney	MALVACEAE		native	
Malacothamnus palmeri (S. Watson) Greene var. palmeri	MALVACEAE		native	
Malacothrix californica DC.	ASTERACEAE		native	
Malacothrix clevelandii A. Gray	ASTERACEAE		native	
Malacothrix coulteri Harv. & A. Gray	ASTERACEAE	SNAKE'S-HEAD	native	
Malacothrix floccifera (DC.) S. F. Blake	ASTERACEAE		native	
Malacothrix foliosa A. Gray	ASTERACEAE	LEAFY MALACOTHRIX	native	
Malacothrix foliosa A. Gray subsp. crispifolia W. S. Davis	ASTERACEAE		native	
Malacothrix foliosa A. Gray subsp. foliosa	ASTERACEAE		native	
Malacothrix foliosa A. Gray subsp. philbrickii W. S. Davis	ASTERACEAE		native	
Malacothrix foliosa A. Gray subsp. polycephala W. S. Davis	ASTERACEAE		native	
Malacothrix glabrata (A. Gray ex D. C. Eaton) A. Gray	ASTERACEAE	DESERT DANDELION	native	
Malacothrix incana (Nutt.) Torr. & A. Gray	ASTERACEAE	DUNEDELION	native	
Malacothrix indecora Greene	ASTERACEAE	SANTA CRUZ ISLAND MALACOTHRIX	native	
Malacothrix junakii W. S. Davis	ASTERACEAE		native	
Malacothrix phaeocarpa W. S. Davis	ASTERACEAE		native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray	ASTERACEAE		native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray var. arachnoidea (E. A. McGregor) E. W. Williams	ASTERACEAE	CARMEL VALLEY MALACOTHRIX	native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray var. commutata (Torr. & A. Gray) Ferris	ASTERACEAE		native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray var. implicata (Eastw.) H. M. Hall	ASTERACEAE		native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray var. saxatilis	ASTERACEAE		native	
Malacothrix saxatilis (Nutt.) Torr. & A. Gray var. tenuifolia (Nutt.) A. Gray	ASTERACEAE		native	
Malacothrix similis W. S. Davis & P. H. Raven	ASTERACEAE		native	
Malacothrix sonchoides (Nutt.) Torr. & A. Gray	ASTERACEAE		native	
Malacothrix squalida Greene	ASTERACEAE	ISLAND MALACOTHRIX	native	
Malacothrix stebbinsii W. S. Davis & P. H. Raven	ASTERACEAE		native	
Malacothrix torreyi A. Gray	ASTERACEAE		native	
Malaxis monophyllos (L.) Sw.	ORCHIDACEAE		native	
Malaxis monophyllos (L.) Sw. var. brachypoda (A. Gray) F. Morris & E. A. Eames	ORCHIDACEAE		native	
Malcolmia africana (L.) W. T. Aiton	BRASSICACEAE		naturalized	
Malcolmia graeca Boiss. & Spruner	BRASSICACEAE		naturalized	acceptance uncertain
Malephora crocea (Jacq.) Schwantes	AIZOACEAE		naturalized	
Malosma laurina (Nutt.) Nutt. ex Abrams	ANACARDIACEAE	LAUREL SUMAC	native	
Malperia tenuis S. Watson	ASTERACEAE	BROWN TURBANS	native	
Malus fusca (Raf.) C. K. Schneid.	ROSACEAE	OREGON CRAB APPLE	native	
Malus sylvestris Mill.	ROSACEAE	APPLE	naturalized	
Malva arborea (L.) Webb & Berthel.	MALVACEAE		naturalized	
Malva neglecta Wallr.	MALVACEAE	CHEESES; COMMON MALLOW	naturalized	
Malva nicaeensis All.	MALVACEAE	BULL MALLOW	naturalized	
Malva parviflora L.	MALVACEAE	CHEESEWEED; LITTLE MALLOW	naturalized	
Malva pseudolavatera Webb. & Berthel.	MALVACEAE		naturalized	
Malva sylvestris L.	MALVACEAE	HIGH MALLOW	naturalized	
Malvella leprosa (Ortega) Krapov.	MALVACEAE	ALKALI-MALLOW; WHITE-WEED	native	
Mammillaria dioica K. Brandegee	CACTACEAE	FISH-HOOK CACTUS; NIPPLE CACTUS	native	
Mammillaria grahamii Engelm.	CACTACEAE	FISH-HOOK CACTUS; NIPPLE CACTUS	native	acceptance uncertain
Mammillaria grahamii Engelm. var. grahamii	CACTACEAE	FISH-HOOK CACTUS; NIPPLE CACTUS	native	
Mammillaria tetrancistra Engelm.	CACTACEAE	FISH-HOOK CACTUS; NIPPLE CACTUS	native	
Marah fabaceus (Naudin) Greene	CUCURBITACEAE	CALIFORNIA MAN-ROOT	native	
Marah horridus (Congdon) Dunn	CUCURBITACEAE	MAN-ROOT; WILD CUCUMBER	native	
Marah macrocarpus (Greene) Greene	CUCURBITACEAE	MAN-ROOT; WILD CUCUMBER	native	
Marah macrocarpus (Greene) Greene var. macrocarpus	CUCURBITACEAE	MAN-ROOT; WILD CUCUMBER	native	
Marah macrocarpus (Greene) Greene var. major (Dunn) Stocking	CUCURBITACEAE	MAN-ROOT; WILD CUCUMBER	native	
Marah oreganus (Torr. & A. Gray) Howell	CUCURBITACEAE	COAST MAN-ROOT	native	
Marah watsonii (Cogn.) Greene	CUCURBITACEAE	MAN-ROOT; WILD CUCUMBER	native	
Marina orcuttii (S. Watson) Barneby	FABACEAE		native	
Marina orcuttii (S. Watson) Barneby var. orcuttii	FABACEAE	CALIFORNIA MARINA	native	
Marina parryi (Torr. & A. Gray) Barneby	FABACEAE		native	
Marrubium vulgare L.	LAMIACEAE	HOREHOUND	naturalized	
Marsilea drummondii A. Braun	MARSILEACEAE		naturalized	
Marsilea oligospora Goodd.	MARSILEACEAE		native	
Marsilea vestita Hook. & Grev.	MARSILEACEAE		native	
Marsilea vestita Hook. & Grev. subsp. vestita	MARSILEACEAE		native	
Matelea parvifolia (Torr.) Woodson	APOCYNACEAE	SPEARLEAF; TALAYOTE	native	
Matricaria matricarioides (Less.) Porter	ASTERACEAE		native	
Matricaria occidentalis Greene	ASTERACEAE		native	
Matthiola incana (L.) W. T. Aiton	BRASSICACEAE	STOCK	naturalized	
Maurandella antirrhiniflora (Humb. & Bonpl. ex Willd.) Rothm.	PLANTAGINACEAE		native	
Maytenus boaria Molina	CELASTRACEAE		naturalized	
Meconella californica Torr. & Frém.	PAPAVERACEAE		native	
Meconella denticulata Greene	PAPAVERACEAE		native	
Meconella oregana Nutt.	PAPAVERACEAE		native	
Medicago arabica (L.) Huds.	FABACEAE	BURCLOVER; SPOTTED BURCLOVER	naturalized	
Medicago lupulina L.	FABACEAE	BLACK MEDICK; YELLOW TREFOIL	naturalized	
Medicago minima (L.) Bartal.	FABACEAE	BURCLOVER	naturalized	
Medicago polymorpha L.	FABACEAE	CALIFORNIA BURCLOVER	naturalized	
Medicago praecox DC.	FABACEAE		naturalized	
Medicago sativa L.	FABACEAE	ALFALFA; LUCERNE	naturalized	
Melaleuca viminalis (Sol. ex Gaertn.) Bymes	MYRTACEAE		naturalized	
Melia azedarach L.	MELIACEAE	CHINA BERRY; PERSIAN LILAC	naturalized	
Melica aristata Bol.	POACEAE	AWNED MELIC	native	
Melica bulbosa Geyer ex Porter & J.M. Coult.	POACEAE	ONIONGRASS	native	
Melica californica Scribn.	POACEAE	CALIFORNIA MELIC	native	
Melica frutescens Scribn.	POACEAE	MELIC; ONIONGRASS	native	
Melica fugax Bol.	POACEAE	MELIC; ONIONGRASS	native	
Melica geyeri Munro	POACEAE	MELIC; ONIONGRASS	native	
Melica harfordii Bol.	POACEAE	MELIC; ONIONGRASS	native	
Melica imperfecta Trin.	POACEAE	MELIC; ONIONGRASS	native	
Melica spectabilis Scribn.	POACEAE	PURPLE ONIONGRASS	native	
Melica stricta Bol.	POACEAE	MELIC; ONIONGRASS	native	
Melica subulata (Griseb.) Scribn.	POACEAE	MELIC; ONIONGRASS	native	
Melica torreyana Scribn.	POACEAE	MELIC; ONIONGRASS	native	
Melilotus albus Medik.	FABACEAE	WHITE SWEETCLOVER	naturalized	
Melilotus indicus (L.) All.	FABACEAE	SOURCLOVER	naturalized	
Melilotus officinalis (L.) Pall.	FABACEAE	YELLOW SWEETCLOVER	naturalized	
Melissa officinalis L.	LAMIACEAE	BEE BALM	naturalized	
Menodora scabra A. Gray	OLEACEAE		native	
Menodora scoparia A. Gray	OLEACEAE		native	
Menodora spinescens A. Gray	OLEACEAE		native	
Mentha aquatica L.	LAMIACEAE		native	
Mentha arvensis L.	LAMIACEAE	MINT	native	
Mentha canadensis L.	LAMIACEAE		native	
Mentha pulegium L.	LAMIACEAE	PENNYROYAL	naturalized	
Mentha spicata L.	LAMIACEAE	MINT	naturalized	
Mentha spicata L. var. spicata	LAMIACEAE	SPEARMINT	naturalized	
Mentha suaveolens Ehrh.	LAMIACEAE	MINT	naturalized	
Mentha x piperita L.	LAMIACEAE	PEPPERMINT	naturalized	
Mentha x villosa Huds.	LAMIACEAE		naturalized	acceptance uncertain
Mentzelia affinis Greene	LOASACEAE	BLAZING STAR	native	
Mentzelia albicaulis (Douglas) Douglas ex Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia congesta Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia crocea Kellogg	LOASACEAE	BLAZING STAR	native	
Mentzelia desertorum (Davidson) H. J. Thomps. & J. E. Roberts	LOASACEAE	BLAZING STAR	native	
Mentzelia dispersa S. Watson	LOASACEAE	BLAZING STAR	native	
Mentzelia eremophila (Jeps.) H. J. Thomps. & J. E. Roberts	LOASACEAE	BLAZING STAR	native	
Mentzelia gracilenta Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia hirsutissima S. Watson	LOASACEAE	BLAZING STAR	native	
Mentzelia involucrata S. Watson	LOASACEAE	BLAZING STAR	native	
Mentzelia inyoensis H. J. Thomps. & Prigge	LOASACEAE	BLAZING STAR	native	
Mentzelia jonesii (Urb. & Gilg) H. J. Thomps. & J. E. Roberts	LOASACEAE	BLAZING STAR	native	
Mentzelia laevicaulis (Hook.) Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia lindleyi Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia micrantha (Hook. & Arn.) Torr. & A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia montana Davidson	LOASACEAE	BLAZING STAR	native	
Mentzelia multiflora (Nutt.) A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia multiflora (Nutt.) A. Gray subsp. longiloba (J. Darl.) Felger	LOASACEAE	BLAZING STAR	native	
Mentzelia nitens Greene	LOASACEAE	BLAZING STAR	native	
Mentzelia obscura H. J. Thomps. & J. E. Roberts	LOASACEAE	BLAZING STAR	native	
Mentzelia oreophila J. Darl.	LOASACEAE	BLAZING STAR	native	
Mentzelia pectinata Kellogg	LOASACEAE	BLAZING STAR	native	
Mentzelia polita A. Nelson	LOASACEAE	BLAZING STAR	native	
Mentzelia pterosperma Eastw.	LOASACEAE	BLAZING STAR	native	
Mentzelia reflexa Coville	LOASACEAE	BLAZING STAR	native	
Mentzelia torreyi A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia tricuspis A. Gray	LOASACEAE	BLAZING STAR	native	
Mentzelia tridentata (Davidson) H. J. Thomps. & J. E. Roberts	LOASACEAE	BLAZING STAR	native	
Mentzelia veatchiana Kellogg	LOASACEAE	BLAZING STAR	native	
Menyanthes trifoliata L.	MENYANTHACEAE	BOGBEAN; BUCKBEAN	native	
Menziesia ferruginea Sm.	ERICACEAE	MOCK AZALEA	native	
Mercurialis annua L.	EUPHORBIACEAE	MERCURY	naturalized	
Mertensia bella Piper	BORAGINACEAE	OREGON LUNGWORT	native	
Mertensia ciliata (Torr.) G. Don	BORAGINACEAE	STREAMSIDE BLUEBELLS	native	
Mertensia cusickii Piper	BORAGINACEAE	TOIYABE BLUEBELLS	native	
Mertensia longiflora Greene	BORAGINACEAE	LONG BLUEBELLS	native	
Mertensia oblongifolia (Nutt.) G. Don	BORAGINACEAE	SAGEBRUSH BLUEBELLS	native	
Mertensia oblongifolia (Nutt.) G. Don var. amoena (A. Nelson) L. O. Williams	BORAGINACEAE	BLUEBELLS; LUNGWORT	native	
Mertensia oblongifolia (Nutt.) G. Don var. nevadensis (A. Nelson) L. O. Williams	BORAGINACEAE	BLUEBELLS; LUNGWORT	native	
Mertensia oblongifolia (Nutt.) G. Don var. oblongifolia	BORAGINACEAE	BLUEBELLS; LUNGWORT	native	
Mesembryanthemum crystallinum L.	AIZOACEAE	CRYSTALLINE ICEPLANT	naturalized	
Mesembryanthemum nodiflorum L.	AIZOACEAE	SLENDER-LEAVED ICEPLANT	naturalized	
Micromonolepis pusilla (Torr. ex S. Watson) Ulbr.	CHENOPODIACEAE		native	
Micropus amphibolus A. Gray	ASTERACEAE	MOUNT DIABLO COTTONWEED	native	
Micropus californicus Fisch. & C. A. Mey.	ASTERACEAE	SLENDER COTTONWEED	native	
Micropus californicus Fisch. & C. A. Mey. var. californicus	ASTERACEAE		native	
Micropus californicus Fisch. & C. A. Mey. var. subvestitus A. Gray	ASTERACEAE		native	
Microseris acuminata Greene	ASTERACEAE		native	
Microseris bigelovii (A. Gray) Sch. Bip.	ASTERACEAE		native	
Microseris borealis (Bong.) Sch. Bip.	ASTERACEAE	NORTHERN MICROSERIS	native	
Microseris campestris Greene	ASTERACEAE		native	
Microseris douglasii (DC.) Sch. Bip.	ASTERACEAE		native	
Microseris douglasii (DC.) Sch. Bip. subsp. douglasii	ASTERACEAE		native	
Microseris douglasii (DC.) Sch. Bip. subsp. platycarpha (A. Gray) K. L. Chambers	ASTERACEAE		native	
Microseris douglasii (DC.) Sch. Bip. subsp. tenella (A. Gray) K. L. Chambers	ASTERACEAE		native	
Microseris elegans Greene ex A. Gray	ASTERACEAE		native	
Microseris laciniata (Hook.) Sch. Bip.	ASTERACEAE		native	
Microseris laciniata (Hook.) Sch. Bip. subsp. detlingii K. L. Chambers	ASTERACEAE		native	
Microseris laciniata (Hook.) Sch. Bip. subsp. laciniata	ASTERACEAE		native	
Microseris laciniata (Hook.) Sch. Bip. subsp. leptosepala (Nutt.) K. L. Chambers	ASTERACEAE		native	
Microseris laciniata (Hook.) Sch. Bip. subsp. siskiyouensis K. L. Chambers	ASTERACEAE		native	
Microseris nutans (Hook.) Sch. Bip.	ASTERACEAE		native	
Microseris paludosa (Greene) J. T. Howell	ASTERACEAE		native	
Microseris sylvatica (Benth.) Sch. Bip.	ASTERACEAE		native	
Microsteris gracilis (Hook.) Greene	POLEMONIACEAE		native	
Mimulus alsinoides Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus androsaceus Greene	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus angustatus (A. Gray) A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus aurantiacus Curtis	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus aurantiacus Curtis var. aridus (Abrams) D. M. Thomps.	PHRYMACEAE		native	
Mimulus aurantiacus Curtis var. aurantiacus	PHRYMACEAE		native	
Mimulus aurantiacus Curtis var. grandiflorus (Lindl.) D. M. Thomps.	PHRYMACEAE		native	
Mimulus aurantiacus Curtis var. parviflorus (Greene) D. M. Thomps.	PHRYMACEAE		native	
Mimulus aurantiacus Curtis var. pubescens (Torr.) D. M. Thomps.	PHRYMACEAE		native	
Mimulus aurantiacus Curtis var. puniceus (Nutt.) D. M. Thomps.	PHRYMACEAE		native	
Mimulus bicolor Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus bigelovii (A. Gray) A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus bigelovii (A. Gray) A. Gray var. bigelovii	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus bigelovii (A. Gray) A. Gray var. cuspidatus A. L. Grant	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus bolanderi A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus breviflorus Piper	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus brevipes Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus breweri (Greene) Coville	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus cardinalis Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus clevelandii Brandegee	PHRYMACEAE	CLEVELAND'S BUSH MONKEYFLOWER	native	
Mimulus congdonii B. L. Rob.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus constrictus (A. L. Grant) Pennell	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus cusickii (Greene) Rattan	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus dentatus Nutt. ex Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus douglasii (Benth.) A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus evanescens Meinke	PHRYMACEAE		native	
Mimulus exiguus A. Gray	PHRYMACEAE	SAN BERNARDINO MOUNTAINS MONKEYFLOWER	native	
Mimulus filicaulis S. Watson	PHRYMACEAE	SLENDER-STEMMED MONKEYFLOWER	native	
Mimulus floribundus Lindl.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus fremontii (Benth.) A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus fremontii (Benth.) A. Gray var. fremontii	PHRYMACEAE		native	
Mimulus fremontii (Benth.) A. Gray var. vandenbergensis D. M. Thomps.	PHRYMACEAE		native	
Mimulus glaucescens Greene	PHRYMACEAE	SHIELD-BRACTED MONKEYFLOWER	native	
Mimulus gracilipes B. L. Rob.	PHRYMACEAE	SLENDER-STALKED MONKEYFLOWER	native	
Mimulus guttatus DC.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus inconspicuus A. Gray	PHRYMACEAE	SMALL-FLOWERED MONKEYFLOWER	native	
Mimulus johnstonii A. L. Grant	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus kelloggii (Curran ex Greene) Curran ex A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus laciniatus A. Gray	PHRYMACEAE	CUT-LEAVED MONKEYFLOWER	native	
Mimulus latidens (A. Gray) Greene	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus latifolius A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus layneae (Greene) Jeps.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus leptaleus A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus lewisii Pursh	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus mohavensis Lemmon	PHRYMACEAE	MOJAVE MONKEYFLOWER	native	
Mimulus montioides A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus moschatus Douglas ex Lindl.	PHRYMACEAE	MUSK MONKEYFLOWER	native	
Mimulus nanus Hook. & Arn.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus nanus Hook. & Arn. var. jepsonii (A. L. Grant) D. M. Thomps.	PHRYMACEAE		native	
Mimulus nanus Hook. & Arn. var. mephiticus (Greene) D. M. Thomps.	PHRYMACEAE		native	
Mimulus nanus Hook. & Arn. var. nanus	PHRYMACEAE		native	
Mimulus norrisii Heckard & Shevock	PHRYMACEAE	KAWEAH MONKEYFLOWER	native	
Mimulus nudatus Curran ex Greene	PHRYMACEAE	BARE MONKEYFLOWER	native	
Mimulus palmeri A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus parishii Greene	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus parryi A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus pictus (Curran ex Greene) A. Gray	PHRYMACEAE	CALICO MONKEYFLOWER	native	
Mimulus pilosus (Benth.) S. Watson	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus primuloides Benth.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus primuloides Benth. subsp. linearifolius (A. L. Grant) Munz	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus primuloides Benth. subsp. primuloides	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus pulchellus (Drew ex Greene) A. L. Grant	PHRYMACEAE	PANSY MONKEYFLOWER	native	
Mimulus pulsiferae A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus purpureus A. L. Grant	PHRYMACEAE	PURPLE MONKEYFLOWER	native	
Mimulus pygmaeus A. L. Grant	PHRYMACEAE	EGG LAKE MONKEYFLOWER	native	
Mimulus rattanii A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus ringens L.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus rubellus A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus rupicola Coville & A. L. Grant	PHRYMACEAE	DEATH VALLEY MONKEYFLOWER	native	
Mimulus shevockii Heckard & Bacig.	PHRYMACEAE	KELSO CREEK MONKEYFLOWER	native	
Mimulus suksdorfii A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus tilingii Regel	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus torreyi A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus tricolor Hartw. ex Lindl.	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus viscidus Congdon	PHRYMACEAE	MONKEYFLOWER	native	
Mimulus viscidus Congdon var. compactus D. M. Thomps.	PHRYMACEAE		native	
Mimulus viscidus Congdon var. viscidus	PHRYMACEAE		native	
Mimulus whitneyi A. Gray	PHRYMACEAE	MONKEYFLOWER	native	
Minuartia californica (A. Gray) Mattf.	CARYOPHYLLACEAE	SANDWORT	native	
Minuartia cismontana Meinke & Zika	CARYOPHYLLACEAE		native	
Minuartia decumbens T. W. Nelson & J. P. Nelson	CARYOPHYLLACEAE	THE LASSICS SANDWORT	native	
Minuartia douglasii (Fenzl ex Torr. & A. Gray) Mattf.	CARYOPHYLLACEAE	SANDWORT	native	
Minuartia howellii (S. Watson) Mattf.	CARYOPHYLLACEAE	HOWELL'S SANDWORT	native	
Minuartia nuttallii (Pax) Briq.	CARYOPHYLLACEAE	SANDWORT	native	
Minuartia nuttallii (Pax) Briq. var. fragilis (Maguire & A. H. Holmgren) Rabeler & R. L. Hartm.	CARYOPHYLLACEAE		native	
Minuartia nuttallii (Pax) Briq. var. gracilis (B. L. Rob) Rabeler & R. L. Hartm.	CARYOPHYLLACEAE		native	
Minuartia nuttallii (Pax) Briq. var. gregaria (A. Heller) Rabeler & R. L. Hartm.	CARYOPHYLLACEAE		native	
Minuartia obtusiloba (Rydb.) House	CARYOPHYLLACEAE	ALPINE SANDWORT	native	
Minuartia pusilla (S. Watson) Mattf.	CARYOPHYLLACEAE	SANDWORT	native	
Minuartia rosei (Maguire & Barneby) McNeill	CARYOPHYLLACEAE	PEANUT SANDWORT	native	
Minuartia rubella (Wahlenb.) Hiern	CARYOPHYLLACEAE	SANDWORT	native	
Minuartia stolonifera T. W. Nelson & J. P. Nelson	CARYOPHYLLACEAE	SCOTT MOUNTAIN SANDWORT	native	
Minuartia stricta (Sw.) Hiern	CARYOPHYLLACEAE	SANDWORT	native	
Mirabilis albida (Walter) Heimerl	NYCTAGINACEAE		native	
Mirabilis alipes (S. Watson) Pilz	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis coccinea (Torr.) Benth. & Hook. f.	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis greenei S. Watson	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis jalapa L.	NYCTAGINACEAE	FOUR-O'CLOCK	naturalized	
Mirabilis jalapa L. var. jalapa	NYCTAGINACEAE		naturalized	
Mirabilis laevis (Benth.) Curran	NYCTAGINACEAE		native	
Mirabilis laevis (Benth.) Curran var. crassifolia (Choisy) Spellenb.	NYCTAGINACEAE		native	
Mirabilis laevis (Benth.) Curran var. retrorsa (A. Heller) Jeps.	NYCTAGINACEAE		native	
Mirabilis laevis (Benth.) Curran var. villosa (Kellogg) Spellenb.	NYCTAGINACEAE		native	
Mirabilis linearis (Pursh) Heimerl	NYCTAGINACEAE	FOUR O'CLOCK	naturalized	
Mirabilis linearis (Pursh) Heimerl var. linearis	NYCTAGINACEAE	FOUR O'CLOCK	naturalized	
Mirabilis multiflora (Torr.) A. Gray	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis multiflora (Torr.) A. Gray var. glandulosa (Standl.) J. F. Macbr.	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis multiflora (Torr.) A. Gray var. pubescens S. Watson	NYCTAGINACEAE	FOUR O'CLOCK	native	
Mirabilis tenuiloba S. Watson	NYCTAGINACEAE	LONG-LOBED FOUR O'CLOCK	native	
Miscanthus sinensis Andersson	POACEAE		naturalized	
Mitella breweri A. Gray	SAXIFRAGACEAE	BISHOP'S CAP	native	
Mitella caulescens Nutt.	SAXIFRAGACEAE	BISHOP'S CAP	native	
Mitella diversifolia Greene	SAXIFRAGACEAE	BISHOP'S CAP	native	
Mitella ovalis Greene	SAXIFRAGACEAE	BISHOP'S CAP	native	
Mitella pentandra Hook.	SAXIFRAGACEAE	BISHOP'S CAP	native	
Mitella trifida Graham	SAXIFRAGACEAE	BISHOP'S CAP	native	
Modiola caroliniana (L.) G. Don	MALVACEAE		naturalized	
Moehringia macrophylla (Hook.) Fenzl	CARYOPHYLLACEAE		native	
Moenchia erecta (L.) P. Gaertn., B. Mey. & Scherb.	CARYOPHYLLACEAE		naturalized	
Moenchia erecta (L.) P. Gaertn., B. Mey. & Scherb. subsp. erecta	CARYOPHYLLACEAE		naturalized	
Mohavea breviflora Coville	PLANTAGINACEAE		native	
Mohavea confertiflora (Benth.) A. Heller	PLANTAGINACEAE	GHOST FLOWER	native	
Mollugo cerviana (L.) Ser.	MOLLUGINACEAE	CARPET-WEED; INDIAN CHICKWEED	naturalized	
Mollugo verticillata L.	MOLLUGINACEAE	CARPET-WEED; INDIAN CHICKWEED	naturalized	
Moluccella laevis L.	LAMIACEAE	SHELL FLOWER	naturalized	
Monanthochloe littoralis Engelm.	POACEAE	SHOREGRASS	native	
Monarda pectinata Nutt.	LAMIACEAE	BEE BALM	native	
Monardella antonina Hardham	LAMIACEAE		native	
Monardella antonina Hardham subsp. antonina	LAMIACEAE	SAN ANTONIO HILLS MONARDELLA	native	
Monardella antonina Hardham subsp. benitensis (Hardham) Jokerst	LAMIACEAE	SAN BENITO MONARDELLA	native	
Monardella australis Abrams	LAMIACEAE		native	
Monardella beneolens Shevock, Ertter & Jokerst	LAMIACEAE	SWEET-SMELLING MONARDELLA	native	
Monardella breweri A. Gray	LAMIACEAE		native	
Monardella candicans Benth.	LAMIACEAE		native	
Monardella cinerea Abrams	LAMIACEAE	GRAY MONARDELLA	native	
Monardella crispa Elmer	LAMIACEAE	CRISP MONARDELLA	native	
Monardella douglasii Benth.	LAMIACEAE		native	
Monardella douglasii Benth. subsp. douglasii	LAMIACEAE		native	
Monardella douglasii Benth. subsp. venosa (Torr.) Jokerst	LAMIACEAE	VEINY MONARDELLA	native	
Monardella exilis (A. Gray) Greene	LAMIACEAE		native	
Monardella follettii (Jeps.) Jokerst	LAMIACEAE		native	
Monardella frutescens (Hoover) Jokerst	LAMIACEAE	SAN LUIS OBISPO MONARDELLA	native	
Monardella glauca Greene	LAMIACEAE		native	
Monardella hypoleuca A. Gray	LAMIACEAE		native	
Monardella hypoleuca A. Gray subsp. hypoleuca	LAMIACEAE		native	
Monardella hypoleuca A. Gray subsp. lanata (Abrams) Munz	LAMIACEAE	FELT-LEAVED MONARDELLA	native	
Monardella lanceolata A. Gray	LAMIACEAE	MUSTANG MINT	native	
Monardella linoides A. Gray	LAMIACEAE		native	
Monardella linoides A. Gray subsp. linoides	LAMIACEAE		native	
Monardella linoides A. Gray subsp. oblonga (Greene) Abrams	LAMIACEAE	FLAX-LIKE MONARDELLA	native	
Monardella linoides A. Gray subsp. stricta (Parish) Epling	LAMIACEAE		native	
Monardella linoides A. Gray subsp. viminea (Greene) Abrams	LAMIACEAE	WILLOWY MONARDELLA	native	acceptance uncertain
Monardella macrantha A. Gray	LAMIACEAE		native	
Monardella macrantha A. Gray subsp. hallii (Abrams) Abrams	LAMIACEAE	HALL'S MONARDELLA	native	
Monardella macrantha A. Gray subsp. macrantha	LAMIACEAE		native	
Monardella nana A. Gray	LAMIACEAE		native	
Monardella nana A. Gray subsp. arida (H. M. Hall) Abrams	LAMIACEAE		native	
Monardella nana A. Gray subsp. leptosiphon (Torr.) Abrams	LAMIACEAE	SAN FELIPE MONARDELLA	native	
Monardella nana A. Gray subsp. nana	LAMIACEAE		native	
Monardella nana A. Gray subsp. tenuiflora (S. Watson ex A. Gray) Abrams	LAMIACEAE		native	
Monardella odoratissima Benth.	LAMIACEAE		native	
Monardella odoratissima Benth. subsp. odoratissima	LAMIACEAE		native	
Monardella odoratissima Benth. subsp. pallida (A. Heller) Epling	LAMIACEAE		native	
Monardella palmeri A. Gray	LAMIACEAE	PALMER'S MONARDELLA	native	
Monardella purpurea Howell	LAMIACEAE	SISKIYOU MONARDELLA	native	
Monardella robisonii Epling ex Munz	LAMIACEAE	ROBISON'S MONARDELLA	native	
Monardella sheltonii Torr.	LAMIACEAE		native	
Monardella siskiyouensis Hardham	LAMIACEAE		native	
Monardella stebbinsii Hardham & Bartel	LAMIACEAE	STEBBINS' MONARDELLA	native	
Monardella stoneana Elvin & A. C.Sanders	LAMIACEAE		native	acceptance uncertain
Monardella undulata Benth.	LAMIACEAE	CURLY-LEAVED MONARDELLA	native	
Monardella villosa Benth.	LAMIACEAE	COYOTE-MINT	native	
Monardella villosa Benth. subsp. franciscana (Elmer) Jokerst	LAMIACEAE		native	
Monardella villosa Benth. subsp. globosa (Greene) Jokerst	LAMIACEAE		native	
Monardella villosa Benth. subsp. obispoensis (Hoover ex Jeps.) Jokerst	LAMIACEAE		native	
Monardella villosa Benth. subsp. villosa	LAMIACEAE		native	
Monardella viridis Jeps.	LAMIACEAE		native	
Monardella viridis Jeps. subsp. saxicola (I. M. Johnst.) Ewan	LAMIACEAE	ROCK MONARDELLA	native	
Monardella viridis Jeps. subsp. viridis	LAMIACEAE	GREEN MONARDELLA	native	
Moneses uniflora (L.) A. Gray	ERICACEAE	WOODNYMPH	native	
Monochoria vaginalis (Burm. f.) C. Presl ex Kunth	PONTEDERIACEAE		naturalized	
Monolepis nuttalliana (Schult.) Greene	CHENOPODIACEAE	POVERTY WEED	native	
Monolepis spathulata A. Gray	CHENOPODIACEAE	POVERTY WEED	native	
Monolopia congdonii (A. Gray) B. G. Baldwin	ASTERACEAE		native	
Monolopia gracilens A. Gray	ASTERACEAE		native	
Monolopia lanceolata Nutt.	ASTERACEAE		native	
Monolopia major DC.	ASTERACEAE		native	
Monolopia stricta Crum	ASTERACEAE		native	
Monoptilon bellidiforme A. Gray	ASTERACEAE	DESERT STAR	native	
Monoptilon bellioides (A. Gray) H. M. Hall	ASTERACEAE	DESERT STAR	native	
Monotropa hypopithys L.	ERICACEAE	PINESAP	native	
Monotropa uniflora L.	ERICACEAE	INDIAN PIPE	native	
Montia chamissoi (Spreng.) Greene	MONTIACEAE	TOAD LILY	native	
Montia dichotoma (Nutt.) Howell	MONTIACEAE		native	
Montia diffusa (Nutt.) Greene	MONTIACEAE		native	
Montia fontana L.	MONTIACEAE	BLINKS; WATER CHICKWEED	native	
Montia howellii S. Watson	MONTIACEAE		native	
Montia linearis (Hook.) Greene	MONTIACEAE		native	
Montia parvifolia (DC.) Greene	MONTIACEAE		native	
Morella californica (Cham. & Schltdl.) Wilbur	MYRICACEAE		native	
Mortonia utahensis (Trel.) A. Nelson	CELASTRACEAE		native	
Morus alba L.	MORACEAE	WHITE MULBERRY	naturalized	
Mucronea californica Benth.	POLYGONACEAE	CALIFORNIA SPINEFLOWER	native	
Mucronea perfoliata (A. Gray) A. Heller	POLYGONACEAE	PERFOLIATE SPINEFLOWER	native	
Muehlenbeckia complexa (A. Cunn.) Meisn.	POLYGONACEAE	MAIDENHAIR VINE	naturalized	
Muehlenbeckia hastulata (Sm.) I. M. Johnst.	POLYGONACEAE		naturalized	
Muehlenbeckia hastulata (Sm.) I. M. Johnst. var. hastulata	POLYGONACEAE		naturalized	acceptance uncertain
Muhlenbergia alopecuroides (Griseb.) P. M. Peterson & Columbus, comb. ined.	POACEAE		native	
Muhlenbergia andina (Nutt.) Hitchc.	POACEAE	FOXTAIL MUHLY	native	
Muhlenbergia appressa C. O. Goodd.	POACEAE	MUHLY	native	
Muhlenbergia arsenei Hitchc.	POACEAE	TOUGH MUHLY	native	
Muhlenbergia asperifolia (Nees & Meyen ex Trin.) Parodi	POACEAE	SCRATCHGRASS	native	
Muhlenbergia californica Vasey	POACEAE	CALIFORNIA MUHLY	native	
Muhlenbergia dumosa Scribn. ex Vasey	POACEAE		native	acceptance uncertain
Muhlenbergia filiformis (Thurb. ex S. Watson) Rydb.	POACEAE	PULL-UP MUHLY	native	
Muhlenbergia fragilis Swallen	POACEAE	DELICATE MUHLY	native	
Muhlenbergia jonesii (Vasey) Hitchc.	POACEAE	MUHLY	native	
Muhlenbergia mexicana (L.) Trin.	POACEAE	MUHLY	native	
Muhlenbergia microsperma (DC.) Kunth	POACEAE	LITTLESEED MUHLY	native	
Muhlenbergia minutissima (Steud.) Swallen	POACEAE	MUHLY	native	
Muhlenbergia montana (Nutt.) Hitchc.	POACEAE	MOUNTAIN MUHLY	native	
Muhlenbergia pauciflora Buckley	POACEAE	FEW-FLOWERED MUHLY	native	
Muhlenbergia porteri Scribn. ex Beal	POACEAE	MUHLY	native	
Muhlenbergia richardsonis (Trin.) Rydb.	POACEAE	MAT MUHLY	native	
Muhlenbergia rigens (Benth.) Hitchc.	POACEAE	DEERGRASS	native	
Muhlenbergia schreberi J. F. Gmel.	POACEAE	NIMBLEWELL	naturalized	
Muhlenbergia thurberi (Scribn.) Rydb.	POACEAE		native	acceptance uncertain
Muhlenbergia utilis (Torr.) Hitchc.	POACEAE	APAREJOGRASS	native	
Muilla clevelandii (S. Watson) Hoover	THEMIDACEAE	SAN DIEGO GOLDENSTAR	native	
Muilla coronata Greene	THEMIDACEAE	CROWNED MUILLA	native	
Muilla maritima (Torr.) S. Watson	THEMIDACEAE	COMMON MUILLA	native	
Muilla transmontana Greene	THEMIDACEAE		native	
Munroa squarrosa (Nutt.) Torr.	POACEAE	FALSE BUFFALOGRASS	native	
Munzothamnus blairii (Munz & I. M. Johnst.) P. H. Raven	ASTERACEAE		native	
Muscari botryoides (L.) Mill.	LILIACEAE	GRAPE HYACINTH	naturalized	
Myoporum laetum G. Forst.	MYOPORACEAE		naturalized	
Myosotis discolor Pers.	BORAGINACEAE	FORGET-ME-NOT	naturalized	
Myosotis latifolia Poir.	BORAGINACEAE	FORGET-ME-NOT	naturalized	
Myosotis laxa Lehm.	BORAGINACEAE	FORGET-ME-NOT	native	
Myosotis micrantha Lehm.	BORAGINACEAE	FORGET-ME-NOT	naturalized	
Myosotis scorpioides L.	BORAGINACEAE	FORGET-ME-NOT	naturalized	
Myosotis verna Nutt.	BORAGINACEAE	FORGET-ME-NOT	naturalized	
Myosurus apetalus Gay	RANUNCULACEAE	MOUSE-TAIL	native	
Myosurus apetalus Gay var. borealis Whittem.	RANUNCULACEAE		native	
Myosurus apetalus Gay var. montanus (G. R. Campb.) Whittem.	RANUNCULACEAE		native	
Myosurus cupulatus S. Watson	RANUNCULACEAE	MOUSE-TAIL	native	
Myosurus minimus L.	RANUNCULACEAE	MOUSE-TAIL	native	
Myosurus sessilis S. Watson	RANUNCULACEAE	MOUSE-TAIL	native	
Myrica hartwegii S. Watson	MYRICACEAE	SIERRA SWEET BAY	native	
Myriophyllum aquaticum (Vell.) Verdc.	HALORAGACEAE	PARROT'S FEATHER	naturalized	
Myriophyllum hippuroides Torr. & A. Gray	HALORAGACEAE	WESTERN MILFOIL	native	
Myriophyllum sibiricum V. Komarov	HALORAGACEAE	WATER-MILFOIL	native	
Myriophyllum spicatum L.	HALORAGACEAE	EURASIAN MILFOIL	naturalized	
Myriophyllum verticillatum L.	HALORAGACEAE	WATER-MILFOIL	native	
Najas flexilis (Willd.) Rostk. & W. L. E. Schmidt	HYDROCHARITACEAE	SLENDER WATER-NYMPH	native	
Najas gracillima (A. Braun ex Engelm.) Magnus	HYDROCHARITACEAE	THREAD-LEAVED WATER-NYMPH	naturalized	
Najas graminea Delile	HYDROCHARITACEAE	RICE-FIELD WATER-NYMPH	naturalized	
Najas guadalupensis (Spreng.) Magnus	HYDROCHARITACEAE	COMMON WATER-NYMPH	native	
Najas guadalupensis (Spreng.) Magnus subsp. guadalupensis	HYDROCHARITACEAE		native	
Najas marina L.	HYDROCHARITACEAE	HOLLY-LEAVED WATER-NYMPH	native	
Nama aretioides (Hook. & Arn.) Brand	BORAGINACEAE	PURPLE MAT	native	
Nama aretioides (Hook. & Arn.) Brand var. californicum (Brand) Jeps.	BORAGINACEAE	PURPLE MAT	native	
Nama aretioides (Hook. & Arn.) Brand var. multiflorum (A. Heller) Jeps.	BORAGINACEAE	PURPLE MAT	native	
Nama californicum (A. Gray) J. D. Bacon	BORAGINACEAE	PURPLE MAT	native	
Nama demissum A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama demissum A. Gray var. covillei Brand	BORAGINACEAE	PURPLE MAT	native	
Nama demissum A. Gray var. demissum	BORAGINACEAE	PURPLE MAT	native	
Nama densum Lemmon	BORAGINACEAE	PURPLE MAT	native	
Nama densum Lemmon var. densum	BORAGINACEAE	PURPLE MAT	native	
Nama densum Lemmon var. parviflorum (Greenm.) C. L. Hitchc.	BORAGINACEAE	PURPLE MAT	native	
Nama depressum A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama dichotomum (Ruiz & Pav.) Choisy	BORAGINACEAE	PURPLE MAT	native	
Nama dichotomum (Ruiz & Pav.) Choisy var. dichotomum	BORAGINACEAE	PURPLE MAT	native	
Nama hispidum A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama hispidum A. Gray var. spathulatum (Torr.) C. L. Hitchc.	BORAGINACEAE	PURPLE MAT	native	
Nama lobbii A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama pusillum A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama rothrockii A. Gray	BORAGINACEAE	PURPLE MAT	native	
Nama stenocarpum A. Gray	BORAGINACEAE	PURPLE MAT	native	
Narcissus pseudonarcissus L.	AMARYLLIDACEAE		naturalized	
Narcissus tazetta L.	AMARYLLIDACEAE		naturalized	
Narthecium californicum Baker	NARTHECIACEAE	BOG ASPHODEL	native	
Nassella cernua (Stebbins & Love) Barkworth	POACEAE	NODDING NEEDLEGRASS	native	
Nassella formicarum (Delile) Barkworth	POACEAE		naturalized	
Nassella lepida (Hitchc.) Barkworth	POACEAE	FOOTHILL NEEDLEGRASS	native	
Nassella pulchra (Hitchc.) Barkworth	POACEAE	PURPLE NEEDLEGRASS	native	
Nasturtium gambelii (S. Watson) O. E. Schulz	BRASSICACEAE		native	
Nasturtium officinale W. T. Aiton	BRASSICACEAE		native	
Navarretia atractyloides (Benth.) Hook. & Arn.	POLEMONIACEAE		native	
Navarretia breweri (A. Gray) Greene	POLEMONIACEAE		native	
Navarretia capillaris (Kellogg) Kuntze	POLEMONIACEAE		native	
Navarretia cotulifolia (Benth.) Hook. & Arn.	POLEMONIACEAE		native	
Navarretia divaricata (A. Gray) Greene	POLEMONIACEAE	MOUNTAIN NAVARRETIA	native	
Navarretia divaricata (A. Gray) Greene subsp. divaricata	POLEMONIACEAE		native	
Navarretia divaricata (A. Gray) Greene subsp. vividior (Jeps. & V. L. Bailey) H. Mason	POLEMONIACEAE		native	
Navarretia eriocephala H. Mason	POLEMONIACEAE	HOARY NAVARRETIA	native	
Navarretia filicaulis (Torr. ex A. Gray) Greene	POLEMONIACEAE		native	
Navarretia fossalis Moran	POLEMONIACEAE		native	
Navarretia hamata Greene	POLEMONIACEAE		native	
Navarretia hamata Greene subsp. hamata	POLEMONIACEAE		native	
Navarretia hamata Greene subsp. leptantha (Greene) H. Mason	POLEMONIACEAE		native	
Navarretia hamata Greene subsp. parviloba A. G. Day	POLEMONIACEAE		native	
Navarretia heterandra H. Mason	POLEMONIACEAE	TEHAMA NAVARRETIA	native	
Navarretia heterodoxa (Greene) Greene	POLEMONIACEAE		native	
Navarretia intertexta (Benth.) Hook.	POLEMONIACEAE		native	
Navarretia intertexta (Benth.) Hook. subsp. intertexta	POLEMONIACEAE		native	
Navarretia intertexta (Benth.) Hook. subsp. propinqua (Suksd.) A. G. Day	POLEMONIACEAE		native	
Navarretia jaredii Eastw.	POLEMONIACEAE	PASO ROBLES NAVARRETIA	native	
Navarretia jepsonii V. L. Bailey ex Jeps.	POLEMONIACEAE	JEPSON'S NAVARRETIA	native	
Navarretia leptalea (A. Gray) L. A. Johnson	POLEMONIACEAE		native	
Navarretia leptalea (A. Gray) L. A. Johnson subsp. bicolor (H. Mason & A. D. Grant) L. A. Johnson	POLEMONIACEAE		native	
Navarretia leptalea (A. Gray) L. A. Johnson subsp. leptalea	POLEMONIACEAE		native	
Navarretia leucocephala Benth.	POLEMONIACEAE		native	
Navarretia leucocephala Benth. subsp. bakeri (H. Mason) A. G. Day	POLEMONIACEAE	BAKER NAVARRETIA	native	
Navarretia leucocephala Benth. subsp. leucocephala	POLEMONIACEAE		native	
Navarretia leucocephala Benth. subsp. minima (Nutt.) A. G. Day	POLEMONIACEAE		native	
Navarretia leucocephala Benth. subsp. pauciflora (H. Mason) A. G. Day	POLEMONIACEAE	FEW-FLOWERED NAVARRETIA	native	
Navarretia leucocephala Benth. subsp. plieantha (H. Mason) A. G. Day	POLEMONIACEAE	MANY-FLOWERED NAVARRETIA	native	
Navarretia mellita Greene	POLEMONIACEAE		native	
Navarretia myersii P. S. Allen & A. G. Day	POLEMONIACEAE	PINCUSHION NAVARRETIA	native	
Navarretia myersii P. S. Allen & A. G. Day subsp. deminuta A. G. Day	POLEMONIACEAE		native	acceptance uncertain
Navarretia myersii P. S. Allen & A. G. Day subsp. myersii	POLEMONIACEAE		native	acceptance uncertain
Navarretia nigelliformis Greene	POLEMONIACEAE		native	
Navarretia nigelliformis Greene subsp. nigelliformis	POLEMONIACEAE		native	
Navarretia nigelliformis Greene subsp. radians (J. T. Howell) A. G. Day	POLEMONIACEAE		native	
Navarretia ojaiensis L. A. Johnson			native	acceptance uncertain
Navarretia peninsularis Greene	POLEMONIACEAE		native	
Navarretia prolifera Greene	POLEMONIACEAE		native	
Navarretia prolifera Greene subsp. lutea (Brand) H. Mason	POLEMONIACEAE	YELLOW BUR NAVARRETIA	native	
Navarretia prolifera Greene subsp. prolifera	POLEMONIACEAE		native	
Navarretia prostrata (A. Gray) Greene	POLEMONIACEAE		native	
Navarretia pubescens (Benth.) Hook. & Arn.	POLEMONIACEAE		native	
Navarretia rosulata Brand	POLEMONIACEAE	MARIN COUNTY NAVARRETIA	native	
Navarretia setiloba Coville	POLEMONIACEAE	PIUTE MOUNTAINS NAVARRETIA	native	
Navarretia sinistra (M. E. Jones) L. A. Johnson	POLEMONIACEAE		native	
Navarretia sinistra (M. E. Jones) L. A. Johnson subsp. pinnatisecta (H. Mason & A. D. Grant) L. A. Johnson	POLEMONIACEAE		native	
Navarretia sinistra (M. E. Jones) L. A. Johnson subsp. sinistra	POLEMONIACEAE		native	
Navarretia squarrosa (Eschsch.) Hook. & Arn.	POLEMONIACEAE	SKUNKWEED	native	
Navarretia subuligera Greene	POLEMONIACEAE	AWL-LEAVED NAVARRETIA	native	
Navarretia tagetina Greene	POLEMONIACEAE	MARIGOLD NAVARRETIA	native	
Navarretia viscidula Benth.	POLEMONIACEAE		native	
Nemacaulis denudata Nutt.	POLYGONACEAE	WOOLLY-HEADS	native	
Nemacaulis denudata Nutt. var. denudata	POLYGONACEAE		native	
Nemacaulis denudata Nutt. var. gracilis Goodman & L. D. Benson	POLYGONACEAE		native	
Nemacladus calcaratus Morin	CAMPANULACEAE		native	
Nemacladus californicus (A. Gray) Morin	CAMPANULACEAE		native	
Nemacladus capillaris Greene	CAMPANULACEAE		native	
Nemacladus glanduliferus Jeps.	CAMPANULACEAE		native	
Nemacladus gracilis Eastw.	CAMPANULACEAE	SLENDER NEMACLADUS	native	
Nemacladus interior (Munz) G. T. Robbins	CAMPANULACEAE		native	
Nemacladus longiflorus A. Gray	CAMPANULACEAE		native	
Nemacladus longiflorus A. Gray var. breviflorus McVaugh	CAMPANULACEAE		native	
Nemacladus longiflorus A. Gray var. longiflorus	CAMPANULACEAE		native	
Nemacladus montanus Greene	CAMPANULACEAE		native	
Nemacladus orientalis (McVaugh) Morin	CAMPANULACEAE		native	
Nemacladus pinnatifidus Greene	CAMPANULACEAE		native	
Nemacladus ramosissimus Nutt.	CAMPANULACEAE		native	
Nemacladus rigidus Curran	CAMPANULACEAE		native	
Nemacladus rubescens Greene	CAMPANULACEAE		native	
Nemacladus secundiflorus G. T. Robbins	CAMPANULACEAE		native	
Nemacladus secundiflorus G. T. Robbins var. robbinsii Morin	CAMPANULACEAE		native	
Nemacladus secundiflorus G. T. Robbins var. secundiflorus	CAMPANULACEAE		native	
Nemacladus sigmoideus G. T. Robbins	CAMPANULACEAE		native	
Nemacladus tenuis (McVaugh) Morin	CAMPANULACEAE		native	
Nemacladus tenuis (McVaugh) Morin var. aliformis Morin	CAMPANULACEAE		native	
Nemacladus tenuis (McVaugh) Morin var. tenuis	CAMPANULACEAE		native	
Nemacladus twisselmannii J. T. Howell	CAMPANULACEAE	TWISSELMANN'S NEMACLADUS	native	
Nemophila breviflora A. Gray	BORAGINACEAE		native	
Nemophila heterophylla Fisch. & C. A. Mey.	BORAGINACEAE		native	
Nemophila maculata Benth. ex Lindl.	BORAGINACEAE	FIVESPOT	native	
Nemophila menziesii Hook. & Arn.	BORAGINACEAE	BABY BLUE-EYES	native	
Nemophila menziesii Hook. & Arn. var. atomaria (Fisch. & C. A. Mey.) Voss	BORAGINACEAE		native	
Nemophila menziesii Hook. & Arn. var. integrifolia Parish	BORAGINACEAE		native	
Nemophila menziesii Hook. & Arn. var. menziesii	BORAGINACEAE		native	
Nemophila parviflora Douglas ex Benth.	BORAGINACEAE		native	
Nemophila parviflora Douglas ex Benth. var. austiniae (Eastw.) Brand	BORAGINACEAE		native	
Nemophila parviflora Douglas ex Benth. var. parviflora	BORAGINACEAE		native	
Nemophila parviflora Douglas ex Benth. var. quercifolia (Eastw.) H. P. Chandler	BORAGINACEAE	OAK-LEAVED NEMOPHILA	native	
Nemophila pedunculata Douglas ex Benth.	BORAGINACEAE		native	
Nemophila pulchella Eastw.	BORAGINACEAE		native	
Nemophila pulchella Eastw. var. fremontii (Elmer) Constance	BORAGINACEAE		native	
Nemophila pulchella Eastw. var. gracilis (Eastw.) Constance	BORAGINACEAE		native	
Nemophila pulchella Eastw. var. pulchella	BORAGINACEAE		native	
Nemophila spatulata Coville	BORAGINACEAE		native	
Neostapfia colusana (Burtt Davy) Burtt Davy	POACEAE	COLUSA GRASS	native	
Nepeta cataria L.	LAMIACEAE	CATNIP	naturalized	
Nerium oleander L.	APOCYNACEAE		naturalized	
Neviusia cliftonii Shevock, Ertter & D. W. Taylor	ROSACEAE	SNOW-WREATH	native	
Nicolletia occidentalis A. Gray	ASTERACEAE		native	
Nicotiana acuminata (Graham) Hook.	SOLANACEAE	TOBACCO	naturalized	
Nicotiana acuminata (Graham) Hook. var. multiflora (Phil.) Reiche	SOLANACEAE	TOBACCO	naturalized	
Nicotiana attenuata Torr. ex S. Watson	SOLANACEAE	TOBACCO	native	
Nicotiana clevelandii A. Gray	SOLANACEAE	TOBACCO	native	
Nicotiana glauca Graham	SOLANACEAE	TREE TOBACCO	naturalized	
Nicotiana obtusifolia M. Martens & Galeotti	SOLANACEAE	TOBACCO	native	
Nicotiana quadrivalvis Pursh	SOLANACEAE	TOBACCO	native	
Nigella damascena L.	RANUNCULACEAE		naturalized	
Nitrophila mohavensis Munz & J. C. Roos	AMARANTHACEAE	AMARGOSA NITROPHILA	native	
Nitrophila occidentalis (Moq.) S. Watson	AMARANTHACEAE		native	
Noccaea fendleri (A. Gray) Holub	BRASSICACEAE		native	
Noccaea fendleri (A. Gray) Holub subsp. californica (S. Watson) Al-Shehbaz & M. Koch	BRASSICACEAE		native	
Noccaea fendleri (A. Gray) Holub subsp. glauca (A. Nelson) Al-Shehbaz & M. Koch	BRASSICACEAE		native	
Nolina bigelovii (Torr.) S. Watson	LILIACEAE	BEARGRASS	native	
Nolina interrata Gentry	LILIACEAE	DEHESA NOLINA	native	
Nothocalais alpestris (A. Gray) K. L. Chambers	ASTERACEAE	FALSE-AGOSERIS	native	
Nothocalais troximoides (A. Gray) Greene	ASTERACEAE	FALSE-AGOSERIS	native	
Nothochelone nemorosa (Lindl.) Straw	PLANTAGINACEAE		native	
Notholaena californica D. C. Eaton	PTERIDACEAE	CALIFORNIA CLOAK FERN	native	
Notholithocarpus densiflorus (Hook. & Arn.) Manos, C.H. Cannon, & S. Oh	FAGACEAE		native	
Notholithocarpus densiflorus (Hook. & Arn.) Manos, C.H. Cannon, & S. Oh var. densiflorus	FAGACEAE		native	
Notholithocarpus densiflorus (Hook. & Arn.) Manos, C.H. Cannon, & S. Oh var. echinoides (R. Br. ter) Manos, C.H. Cannon, & S. Oh	FAGACEAE		native	
Nothoscordum gracile (Aiton) Stearn	ALLIACEAE	FALSE GARLIC	naturalized	
Nuphar polysepala Engelm.	NYMPHAEACEAE		native	
Nymphaea mexicana Zucc.	NYMPHAEACEAE	BANANA WATERLILY; YELLOW WATERLILY	naturalized	acceptance uncertain
Nymphaea odorata Aiton	NYMPHAEACEAE	FRAGRANT WATERLILY; WHITE WATERLILY	naturalized	
Nymphaea odorata Aiton subsp. odorata	NYMPHAEACEAE		naturalized	
Nymphoides peltata (S. G. Gmel.) Kuntze	MENYANTHACEAE	WATER FRINGE	naturalized	
Odontostomum hartwegii Torr.	TECOPHILAEACEAE		native	
Oemleria cerasiformis (Hook. & Arn.) J. W. Landon	ROSACEAE	OSO BERRY	native	
Oenanthe pimpinelloides L.	APIACEAE		naturalized	
Oenanthe sarmentosa C. Presl ex DC.	APIACEAE		native	
Oenothera biennis L.	ONAGRACEAE	COMMON EVENING PRIMROSE	naturalized	
Oenothera caespitosa Nutt.	ONAGRACEAE	FRAGRANT EVENING PRIMROSE	native	
Oenothera caespitosa Nutt. subsp. crinita (Rydb.) Munz	ONAGRACEAE	CAESPITOSE EVENING PRIMROSE	native	
Oenothera caespitosa Nutt. subsp. marginata (Hook. & Arn.) Munz	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera californica (S. Watson) S. Watson	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera californica (S. Watson) S. Watson subsp. avita W. M. Klein	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera californica (S. Watson) S. Watson subsp. californica	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera californica (S. Watson) S. Watson subsp. eurekensis (Munz & J. C. Roos) W. M. Klein	ONAGRACEAE	EUREKA DUNES EVENING PRIMROSE	native	
Oenothera deltoides Torr. & Frém.	ONAGRACEAE	BASKET EVENING PRIMROSE; DEVIL'S LANTERN; LION-IN-A-CAGE	native	
Oenothera deltoides Torr. & Frém. subsp. cognata (Jeps.) W. M. Klein	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera deltoides Torr. & Frém. subsp. deltoides	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera deltoides Torr. & Frém. subsp. howellii (Munz) W. M. Klein	ONAGRACEAE	ANTIOCH DUNES EVENING PRIMROSE	native	
Oenothera deltoides Torr. & Frém. subsp. piperi (Munz) W. M. Klein	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera elata Kunth	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera elata Kunth subsp. hirsutissima (S. Watson) W. Dietr.	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera elata Kunth subsp. hookeri (Torr. & A. Gray) W. Dietr. & W. L. Wagner	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera flava (A. Nelson) Garrett	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera flava (A. Nelson) Garrett subsp. flava	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera glazioviana Micheli	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera laciniata Hill	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera longissima Rydb.	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera primiveris A. Gray	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera pubescens Spreng.	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera rosea L'Hér ex Aiton	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera speciosa Nutt.	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera stricta Link	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera stricta Link subsp. stricta	ONAGRACEAE	EVENING PRIMROSE	naturalized	
Oenothera villosa Thunb.	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera villosa Thunb. subsp. strigosa (Rydb.) W. Dietr. & P. H. Raven	ONAGRACEAE	EVENING PRIMROSE	native	
Oenothera wolfii (Munz) P. H. Raven, W. Dietr. & Stubbe	ONAGRACEAE	WOLF'S EVENING PRIMROSE	native	
Oenothera xylocarpa Coville	ONAGRACEAE	EVENING PRIMROSE	native	
Olea africana Mill.	OLEACEAE		naturalized	
Olea europaea L.	OLEACEAE	OLIVE	naturalized	
Oligomeris linifolia (Vahl ex Hornem.) J. F. Macbr.	RESEDACEAE		native	
Olneya tesota A. Gray	FABACEAE	IRONWOOD	native	
Olsynium douglasii (A. Dietr.) E. P. Bicknell	IRIDACEAE		native	
Olsynium douglasii (A. Dietr.) E. P. Bicknell var. douglasii	IRIDACEAE		native	
Oncosiphon piluliferum (L. f.) Källersjö	ASTERACEAE		naturalized	
Onobrychis viciifolia Scop.	FABACEAE	SANFOIN	naturalized	
Onopordum acanthium L.	ASTERACEAE		naturalized	
Onopordum acanthium L. subsp. acanthium	ASTERACEAE	SCOTCH THISTLE	naturalized	
Onopordum illyricum L.	ASTERACEAE	ILLYRIAN THISTLE	naturalized	
Onopordum tauricum Willd.	ASTERACEAE	TAURIAN THISTLE	naturalized	
Ophioglossum californicum Prantl	OPHIOGLOSSACEAE	CALIFORNIA ADDER'S-TONGUE	native	
Ophioglossum pusillum Raf.	OPHIOGLOSSACEAE	NORTHERN ADDER'S-TONGUE	native	
Opuntia basilaris Engelm. & J. M. Bigelow	CACTACEAE	BEAVERTAIL CACTUS	native	
Opuntia basilaris Engelm. & J. M. Bigelow var. basilaris	CACTACEAE	BEAVERTAIL	native	
Opuntia basilaris Engelm. & J. M. Bigelow var. brachyclada (Griffiths) Munz	CACTACEAE	SHORT-JOINT BEAVERTAIL	native	
Opuntia basilaris Engelm. & J. M. Bigelow var. treleasei (J. M. Coult.) Toumey	CACTACEAE	BAKERSFIELD CACTUS	native	
Opuntia chlorotica Engelm. & J. M. Bigelow	CACTACEAE	PANCAKE PRICKLY-PEAR	native	
Opuntia engelmannii Salm-Dyck	CACTACEAE	CHOLLA; PRICKLY-PEAR	native	
Opuntia engelmannii Salm-Dyck var. engelmannii	CACTACEAE	ENGELMANN PRICKLY-PEAR	native	
Opuntia ficus-indica (L.) Mill.	CACTACEAE	INDIAN-FIG	naturalized	
Opuntia fragilis (Nutt.) Haw.	CACTACEAE	BRITTLE OR LITTLE PRICKLY-PEAR	native	
Opuntia littoralis (Engelm.) Cockerell	CACTACEAE	CHOLLA; PRICKLY-PEAR	native	
Opuntia microdasys (Lehm.) Pfeiff.	CACTACEAE		naturalized	acceptance uncertain
Opuntia oricola Philbrick	CACTACEAE	CHOLLA; PRICKLY-PEAR	native	
Opuntia phaeacantha Engelm.	CACTACEAE	CHOLLA; PRICKLY-PEAR	native	
Opuntia polyacantha Haw.	CACTACEAE		native	
Opuntia polyacantha Haw. var. erinacea (Engelm. & J. M. Bigelow) B. D. Parfitt	CACTACEAE		native	
Opuntia polyacantha Haw. var. hystricina (Engelm. & J. M. Bigelow) B. D. Parfitt	CACTACEAE		native	
Orcuttia californica Vasey	POACEAE	CALIFORNIA ORCUTT GRASS	native	
Orcuttia inaequalis Hoover	POACEAE	SAN JOAQUIN VALLEY ORCUTT GRASS	native	
Orcuttia pilosa Hoover	POACEAE	HAIRY ORCUTT GRASS	native	
Orcuttia tenuis Hitchc.	POACEAE	SLENDER ORCUTT GRASS	native	
Orcuttia viscida (Hoover) Reeder	POACEAE	SACRAMENTO ORCUTT GRASS	native	
Oreonana clementis (M. E. Jones) Jeps.	APIACEAE		native	
Oreonana purpurascens Shevock & Constance	APIACEAE	PURPLE MOUNTAIN-PARSLEY	native	
Oreonana vestita (S. Watson) Jeps.	APIACEAE	WOOLLY MOUNTAIN-PARSLEY	native	
Oreostemma alpigenum (Torr. & A. Gray) Greene	ASTERACEAE		native	
Oreostemma alpigenum (Torr. & A. Gray) Greene var. andersonii (A. Gray) G. L. Nesom	ASTERACEAE		native	
Oreostemma elatum (Greene) Greene	ASTERACEAE		native	
Oreostemma peirsonii (Sharsm.) G. L. Nesom	ASTERACEAE		native	
Origanum vulgare L.	LAMIACEAE	OREGANO	naturalized	
Ornithostaphylos oppositifolia (Parry) Small	ERICACEAE	BAJA CALIFORNIA BIRDBUSH	native	
Orobanche bulbosa G. Beck	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl.	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl. subsp. californica	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl. subsp. feudgei (Munz) Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl. subsp. grandis Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl. subsp. grayana (G. Beck) Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche californica Cham. & Schltdl. subsp. jepsonii (Munz) Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche cooperi (A. Gray) A. Heller	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche corymbosa (Rydb.) Ferris	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche fasciculata Nutt.	OROBANCHACEAE	CLUSTERED BROOM-RAPE	native	
Orobanche parishii (Jeps.) Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche parishii (Jeps.) Heckard subsp. brachyloba Heckard	OROBANCHACEAE	SHORT-LOBED BROOM-RAPE	native	
Orobanche parishii (Jeps.) Heckard subsp. parishii	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche pinorum Hook.	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche ramosa L.	OROBANCHACEAE	BROOM-RAPE	naturalized	
Orobanche uniflora L.	OROBANCHACEAE	NAKED BROOM-RAPE	native	
Orobanche valida Jeps.	OROBANCHACEAE	BROOM-RAPE	native	
Orobanche valida Jeps. subsp. howellii Heckard & L. T. Collins	OROBANCHACEAE	HOWELL'S BROOM-RAPE	native	
Orobanche valida Jeps. subsp. valida	OROBANCHACEAE	ROCK CREEK BROOM-RAPE	native	
Orobanche vallicola (Jeps.) Heckard	OROBANCHACEAE	BROOM-RAPE	native	
Orochaenactis thysanocarpha (A. Gray) Coville	ASTERACEAE		native	
Orogenia fusiformis S. Watson	APIACEAE		native	
Orthilia secunda (L.) House	ERICACEAE	ONE-SIDED WINTERGREEN	native	
Orthocarpus bracteosus Benth.	SCROPHULARIACEAE		native	
Orthocarpus cuspidatus Greene	SCROPHULARIACEAE		native	
Orthocarpus cuspidatus Greene subsp. copelandii (Eastw.) T. I. Chuang & Heckard	SCROPHULARIACEAE		native	
Orthocarpus cuspidatus Greene subsp. cryptanthus (Piper) T. I. Chuang & Heckard	SCROPHULARIACEAE		native	
Orthocarpus cuspidatus Greene subsp. cuspidatus	SCROPHULARIACEAE	SISKIYOU MOUNTAINS ORTHOCARPUS	native	
Orthocarpus imbricatus S. Watson	SCROPHULARIACEAE		native	
Orthocarpus luteus Nutt.	SCROPHULARIACEAE		native	
Orthocarpus pachystachyus A. Gray	SCROPHULARIACEAE	SHASTA ORTHOCARPUS	native	
Oryctes nevadensis S. Watson	SOLANACEAE	NEVADA ORYCTES	native	
Oryza sativa L.	POACEAE	RICE	naturalized	
Osmadenia tenella Nutt.	ASTERACEAE	OSMADENIA	native	
Osmorhiza berteroi DC.	APIACEAE		native	
Osmorhiza brachypoda Torr.	APIACEAE		native	
Osmorhiza depauperata Phil.	APIACEAE		native	
Osmorhiza occidentalis (Nutt.) Torr.	APIACEAE		native	
Osmorhiza purpurea (J. M. Coult. & Rose) Suksd.	APIACEAE		native	
Osteospermum ecklonis (DC.) Norl.	ASTERACEAE	AFRICAN DAISY	naturalized	
Osteospermum fruticosum (L.) Norl.	ASTERACEAE		naturalized	
Oxalis articulata Savigny subsp. rubra (A. St.-Hil.) Lourteig	OXALIDACEAE		naturalized	
Oxalis californica (Abrams) R. Knuth	OXALIDACEAE		native	
Oxalis corniculata L.	OXALIDACEAE		native	
Oxalis corniculata L. subsp. corniculata	OXALIDACEAE		naturalized	
Oxalis corniculata L. subsp. pilosa (Nutt.) Lourteig	OXALIDACEAE		native	
Oxalis incarnata L.	OXALIDACEAE		naturalized	
Oxalis micrantha Bertero ex Colla	OXALIDACEAE		naturalized	
Oxalis oregana Nutt.	OXALIDACEAE	REDWOOD SORREL	native	
Oxalis pes-caprae L.	OXALIDACEAE	BERMUDA BUTTERCUP	naturalized	
Oxalis suksdorfii Trel.	OXALIDACEAE		native	
Oxalis trilliifolia Hook.	OXALIDACEAE		native	
Oxypolis occidentalis J. M. Coult. & Rose	APIACEAE		native	
Oxyria digyna (L.) Hill	POLYGONACEAE	MOUNTAIN SORREL	native	
Oxystylis lutea Torr. & Frém.	BRASSICACEAE		native	
Oxytenia acerosa Nutt.	ASTERACEAE		native	acceptance uncertain
Oxytheca dendroidea Nutt.	POLYGONACEAE		native	
Oxytheca dendroidea Nutt. subsp. dendroidea	POLYGONACEAE		native	
Oxytheca perfoliata Torr. & A. Gray	POLYGONACEAE		native	
Oxytheca watsonii Torr. & A. Gray	POLYGONACEAE	WATSON'S OXYTHECA	native	
Oxytropis borealis DC.	FABACEAE		native	
Oxytropis borealis DC. var. australis S. L. Welsh	FABACEAE		native	
Oxytropis borealis DC. var. viscida (Nutt.) S. L. Welsh	FABACEAE		native	
Oxytropis deflexa (Pall.) DC.	FABACEAE		native	
Oxytropis deflexa (Pall.) DC. var. sericea Torr. & A. Gray	FABACEAE	BLUE PENDENT-POD OXYTROPE	native	
Oxytropis oreophila A. Gray	FABACEAE		native	
Oxytropis oreophila A. Gray var. oreophila	FABACEAE		native	
Oxytropis parryi A. Gray	FABACEAE		native	
Packera bernardina (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera bolanderi (A. Gray) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera bolanderi (A. Gray) W. A. Weber & Á. Löve var. bolanderi	ASTERACEAE		native	
Packera breweri (Burtt Davy) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera cana (Hook.) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera clevelandii (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve	ASTERACEAE		native	
Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve var. eurycephala	ASTERACEAE		native	
Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve var. lewisrosei (J. T. Howell) J. F. Bain	ASTERACEAE		native	
Packera ganderi (T. M. Barkley & R. M. Beauch.) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera greenei (A. Gray) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera hesperia (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera indecora (Greene) Á. Löve & D. Löve	ASTERACEAE		native	
Packera ionophylla (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera layneae (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera macounii (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera multilobata (Torr. & A. Gray) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera pauciflora (Pursh) Á. Löve & D. Löve	ASTERACEAE		native	
Packera pseudaurea (Rydb.) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera pseudaurea (Rydb.) W. A. Weber & Á. Löve var. pseudaurea	ASTERACEAE		native	
Packera streptanthifolia (Greene) W. A. Weber & Á. Löve	ASTERACEAE		native	
Packera subnuda Trock & T. M. Barkley	ASTERACEAE		native	
Packera werneriifolia (A. Gray) W. A. Weber & Á. Löve	ASTERACEAE		native	
Paeonia brownii Douglas	PAEONIACEAE	PEONY	native	
Paeonia californica Nutt.	PAEONIACEAE	PEONY	native	
Palafoxia arida B. L. Turner & M. I. Morris	ASTERACEAE		native	
Palafoxia arida B. L. Turner & M. I. Morris var. gigantea (M. E. Jones) B. L. Turner & M. I. Morris	ASTERACEAE	GIANT SPANISH-NEEDLE	native	
Palafoxia arida B. L. Turner & M. Morris var. arida	ASTERACEAE		native	
Pancratium maritimum L.	AMARYLLIDACEAE		naturalized	
Panicum acuminatum Sw.	POACEAE	MILLET; PANICGRASS	native	
Panicum acuminatum Sw. var. acuminatum	POACEAE	MILLET; PANICGRASS	native	
Panicum acuminatum Sw. var. lindheimeri (Nash) Fernald	POACEAE	MILLET; PANICGRASS	native	
Panicum alatum Zuloaga & Morrone	POACEAE		native	acceptance uncertain
Panicum alatum Zuloaga & Morrone var. alatum	POACEAE		native	acceptance uncertain
Panicum alatum Zuloaga & Morrone var. longiflorum Zuloaga & Morrone	POACEAE		native	acceptance uncertain
Panicum antidotale Retz.	POACEAE	BLUE PANICGRASS	naturalized	
Panicum capillare L.	POACEAE	WITCHGRASS	native	
Panicum capillare L. subsp. capillare	POACEAE		native	acceptance uncertain
Panicum capillare L. subsp. hillmanii (Chase) Freckmann & Lelong	POACEAE		naturalized	acceptance uncertain
Panicum dichotomiflorum Michx.	POACEAE	MILLET; PANICGRASS	naturalized	
Panicum dichotomum L.	POACEAE		native	acceptance uncertain
Panicum hillmanii Chase	POACEAE	MILLET; PANICGRASS	naturalized	acceptance uncertain
Panicum hirticaule J. Presl	POACEAE	MILLET; PANICGRASS	native	
Panicum hirticaule J. Presl var. hirticaule	POACEAE		native	acceptance uncertain
Panicum miliaceum L.	POACEAE	BROOM CORN MILLET	naturalized	
Panicum miliaceum L. subsp. ruderale (Kitag.) Tzvelev	POACEAE		naturalized	acceptance uncertain
Panicum oligosanthes Schult.	POACEAE	MILLET; PANICGRASS	native	
Panicum oligosanthes Schult. var. scribnerianum (Nash) Fernald	POACEAE	MILLET; PANICGRASS	native	
Panicum rigidulum Bosc ex Nees	POACEAE		naturalized	acceptance uncertain
Panicum rigidulum Bosc ex Nees var. rigidulum	POACEAE		naturalized	acceptance uncertain
Panicum urvilleanum Kunth	POACEAE	MILLET; PANICGRASS	native	
Papaver argemone L.	PAPAVERACEAE		naturalized	
Papaver californicum A. Gray	PAPAVERACEAE	FIRE POPPY	native	
Papaver heterophyllum (Benth.) Greene	PAPAVERACEAE		native	
Papaver hybridum L.	PAPAVERACEAE		naturalized	
Papaver rhoeas L.	PAPAVERACEAE	CORN POPPY	naturalized	
Papaver somniferum L.	PAPAVERACEAE	OPIUM POPPY	naturalized	
Parapholis incurva (L.) C. E. Hubb.	POACEAE	SICKLE GRASS	naturalized	
Parapholis strigosa (Dumort.) C. E. Hubb.	POACEAE		naturalized	
Parentucellia latifolia (L.) Caruel	SCROPHULARIACEAE		naturalized	
Parentucellia viscosa (L.) Caruel	SCROPHULARIACEAE		naturalized	
Parietaria hespera Hinton	URTICACEAE	PELLITORY	native	
Parietaria hespera Hinton var. californica Hinton	URTICACEAE	PELLITORY	native	
Parietaria hespera Hinton var. hespera	URTICACEAE	PELLITORY	native	
Parietaria judaica L.	URTICACEAE	PELLITORY	naturalized	
Parietaria pensylvanica Willd.	URTICACEAE	PELLITORY	native	
Parkinsonia aculeata L.	FABACEAE	MEXICAN PALO VERDE	naturalized	
Parkinsonia florida (Benth. ex A. Gray) S. Watson	FABACEAE		native	
Parkinsonia microphylla Torr.	FABACEAE		native	
Parnassia cirrata Piper	PARNASSIACEAE	GRASS-OF-PARNASSUS	native	
Parnassia cirrata Piper var. cirrata	PARNASSIACEAE		native	
Parnassia cirrata Piper var. intermedia (Rydb.) P. K. Holmgren & N. H. Holmgren	PARNASSIACEAE		native	
Parnassia fimbriata Konig	PARNASSIACEAE	GRASS-OF-PARNASSUS	native	
Parnassia palustris L.	PARNASSIACEAE		native	
Parnassia parviflora DC.	PARNASSIACEAE	GRASS-OF-PARNASSUS	native	
Paronychia ahartii Ertter	CARYOPHYLLACEAE	AHART'S PARONYCHIA	native	
Paronychia echinulata Chater	CARYOPHYLLACEAE	NAILWORT; WHITLOW-WORT	naturalized	
Paronychia echinulata Chater var. echinulata	CARYOPHYLLACEAE	NAILWORT; WHITLOW-WORT	naturalized	
Paronychia franciscana Eastw.	CARYOPHYLLACEAE	NAILWORT; WHITLOW-WORT	naturalized	
Parthenocissus vitacea (Knerr) Hitchc.	VITACEAE	WOODBINE	naturalized	
Pascopyrum smithii (Rydb.) Á. Löve ex Barkworth & D.R. Dewey	POACEAE		native	
Paspalum dilatatum Poir.	POACEAE	DALLIS GRASS	naturalized	
Paspalum distichum L.	POACEAE		native	
Paspalum notatum Flüggé	POACEAE		naturalized	
Paspalum urvillei Steud.	POACEAE		naturalized	
Paspalum vaginatum Sw.	POACEAE		naturalized	acceptance uncertain
Passiflora tarminiana Coppens & V. E. Barney	PASSIFLORACEAE		naturalized	acceptance uncertain
Pastinaca sativa L.	APIACEAE	PARSNIP	naturalized	
Paxistima myrsinites (Pursh) Raf.	CELASTRACEAE	OREGON BOXWOOD	native	
Pectis papposa Harv. & A. Gray	ASTERACEAE		native	
Pectis papposa Harv. & A. Gray var. papposa	ASTERACEAE	CHINCH-WEED	native	
Pectocarya heterocarpa (I. M. Johnst.) I. M. Johnst.	BORAGINACEAE		native	
Pectocarya linearis (Ruiz & Pav.) DC.	BORAGINACEAE		native	
Pectocarya linearis (Ruiz & Pav.) DC. subsp. ferocula (I. M. Johnst.) Thorne	BORAGINACEAE		native	
Pectocarya penicillata (Hook. & Arn.) A. DC.	BORAGINACEAE		native	
Pectocarya peninsularis I. M. Johnst.	BORAGINACEAE		native	
Pectocarya platycarpa (Munz & I. M. Johnst.) Munz & I. M. Johnst.	BORAGINACEAE		native	
Pectocarya pusilla (A. DC.) A. Gray	BORAGINACEAE		native	
Pectocarya recurvata I. M. Johnst.	BORAGINACEAE		native	
Pectocarya setosa A. Gray	BORAGINACEAE		native	
Pedicularis attollens A. Gray	SCROPHULARIACEAE	LITTLE ELEPHANT'S HEAD	native	
Pedicularis bracteosa Benth.	SCROPHULARIACEAE	LOUSEWORT	native	
Pedicularis bracteosa Benth. var. flavida (Pennell) Cronquist	SCROPHULARIACEAE	LOUSEWORT	native	
Pedicularis centranthera A. Gray	SCROPHULARIACEAE	DWARF LOUSEWORT	native	
Pedicularis contorta Benth.	SCROPHULARIACEAE	CURVED-BEAK LOUSEWORT	native	
Pedicularis crenulata Benth.	SCROPHULARIACEAE	SCALLOP-LEAVED LOUSEWORT	native	
Pedicularis densiflora Hook.	SCROPHULARIACEAE	INDIAN WARRIOR	native	
Pedicularis dudleyi Elmer	SCROPHULARIACEAE	DUDLEY'S LOUSEWORT	native	
Pedicularis groenlandica Retz.	SCROPHULARIACEAE	ELEPHANT'S HEAD	native	
Pedicularis howellii A. Gray	SCROPHULARIACEAE	HOWELL'S LOUSEWORT	native	
Pedicularis racemosa Douglas ex Benth.	SCROPHULARIACEAE	LEAFY LOUSEWORT	native	
Pedicularis semibarbata A. Gray	SCROPHULARIACEAE	LOUSEWORT	native	
Pediomelum californicum (S. Watson) Rydb.	FABACEAE	INDIAN BREADROOT	native	
Pediomelum castoreum (S. Watson) Rydb.	FABACEAE	INDIAN BREADROOT	native	
Peganum harmala L.	NITRARIACEAE		naturalized	
Pelargonium grossularioides (L.) L'Hér.	GERANIACEAE	GARDEN GERANIUM	naturalized	
Pelargonium inquinans (L.) L'Hér.	GERANIACEAE	GARDEN GERANIUM	naturalized	
Pelargonium panduriforme Eckl. & Zeyher	GERANIACEAE	OAK-LEAFED GERANIUM	naturalized	
Pelargonium x hortorum L. H. Bailey	GERANIACEAE	GARDEN GERANIUM	naturalized	
Pellaea andromedifolia (Kaulf.) Fée	PTERIDACEAE	COFFEE FERN	native	
Pellaea brachyptera (T. Moore) Baker	PTERIDACEAE	CLIFF-BRAKE	native	
Pellaea breweri D. C. Eaton	PTERIDACEAE	CLIFF-BRAKE	native	
Pellaea bridgesii Hook.	PTERIDACEAE	CLIFF-BRAKE	native	
Pellaea mucronata (D. C. Eaton) D. C. Eaton	PTERIDACEAE	BIRD'S-FOOT FERN	native	
Pellaea mucronata (D. C. Eaton) D. C. Eaton var. californica (Lemmon) Munz & I. M. Johnst.	PTERIDACEAE	CLIFF-BRAKE	native	
Pellaea mucronata (D. C. Eaton) D. C. Eaton var. mucronata	PTERIDACEAE	CLIFF-BRAKE	native	
Pellaea truncata Goodd.	PTERIDACEAE	CLIFF-BRAKE	native	
Pennisetum clandestinum Chiov.	POACEAE	KIKUYU GRASS	naturalized	
Pennisetum latifolium Spreng.	POACEAE		naturalized	acceptance uncertain
Pennisetum macrourum Trin.	POACEAE		naturalized	acceptance uncertain
Pennisetum setaceum (Forssk.) Chiov.	POACEAE		naturalized	
Pennisetum villosum R. Br.	POACEAE		naturalized	
Penstemon albomarginatus M. E. Jones	PLANTAGINACEAE	WHITE-MARGINED BEARDTONGUE	native	
Penstemon anguineus Eastw.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon azureus Benth.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon azureus Benth. var. angustissimus A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon azureus Benth. var. azureus	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon barnebyi N. H. Holmgren	PLANTAGINACEAE	BARNEBY'S BEARDTONGUE	native	
Penstemon bicolor (Brandegee) Clokey & D. D. Keck	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon caesius A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon calcareus Brandegee	PLANTAGINACEAE	LIMESTONE BEARDTONGUE	native	
Penstemon californicus (Munz & I. M. Johnst.) D. D. Keck	PLANTAGINACEAE	CALIFORNIA PENSTEMON	native	
Penstemon centranthifolius Benth.	PLANTAGINACEAE	SCARLET BUGLER	native	
Penstemon cinicola D. D. Keck	PLANTAGINACEAE	ASH BEARDTONGUE	native	
Penstemon clevelandii A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon clevelandii A. Gray var. clevelandii	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon clevelandii A. Gray var. connatus Munz & I. M. Johnst.	PLANTAGINACEAE	SAN JACINTO BEARDTONGUE	native	
Penstemon clevelandii A. Gray var. mohavensis (D. D. Keck) McMinn	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon davidsonii Greene	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon davidsonii Greene var. davidsonii	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon deustus Lindl.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon deustus Lindl. var. pedicellatus M. E. Jones	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon deustus Lindl. var. suffrutescens L. F. Hend.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon eatonii A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon eatonii A. Gray var. eatonii	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon eatonii A. Gray var. undosus M. E. Jones	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon filiformis (D. D. Keck) D. D. Keck	PLANTAGINACEAE	THREAD-LEAVED BEARDTONGUE	native	
Penstemon floridus Brandegee	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon floridus Brandegee var. austinii (Eastw.) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon floridus Brandegee var. floridus	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon fruticiformis Coville	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon fruticiformis Coville var. amargosae (D. D. Keck) N. H. Holmgren	PLANTAGINACEAE	DEATH VALLEY BEARDTONGUE	native	
Penstemon fruticiformis Coville var. fruticiformis	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon gracilentus A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon grinnellii Eastw.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon grinnellii Eastw. var. grinnellii	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon grinnellii Eastw. var. scrophularioides (M. E. Jones) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterodoxus A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterodoxus A. Gray var. cephalophorus (Greene) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterodoxus A. Gray var. heterodoxus	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterodoxus A. Gray var. shastensis (D. D. Keck) N. H. Holmgren	PLANTAGINACEAE	SHASTA BEARDTONGUE	native	
Penstemon heterophyllus Lindl.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterophyllus Lindl. var. australis Munz & I. M. Johnst.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterophyllus Lindl. var. heterophyllus	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon heterophyllus Lindl. var. purdyi (D. D. Keck) McMinn	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon humilis A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon humilis A. Gray var. humilis	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon incertus Brandegee	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon janishiae N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon labrosus (A. Gray) Hook. f.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon laetus A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon laetus A. Gray var. laetus	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon laetus A. Gray var. leptosepalus A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon laetus A. Gray var. sagittatus (D. D. Keck) McMinn	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon monoensis A. Heller	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon neotericus D. D. Keck	PLANTAGINACEAE	PLUMAS COUNTY BEARDTONGUE	native	
Penstemon newberryi A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon newberryi A. Gray var. berryi (Eastw.) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon newberryi A. Gray var. newberryi	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon newberryi A. Gray var. sonomensis (Greene) Jeps.	PLANTAGINACEAE	SONOMA BEARDTONGUE	native	
Penstemon pahutensis N. H. Holmgren	PLANTAGINACEAE	PAHUTE BEARDTONGUE	native	
Penstemon palmeri A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon palmeri A. Gray var. palmeri	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon papillatus J. T. Howell	PLANTAGINACEAE	INYO BEARDTONGUE	native	
Penstemon parvulus (A. Gray) Krautter	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon patens (M. E. Jones) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon personatus D. D. Keck	PLANTAGINACEAE	CLOSE-THROATED BEARDTONGUE	native	
Penstemon procerus Graham	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon procerus Graham var. brachyanthus (Pennell) Cronquist	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon procerus Graham var. formosus (A. Nelson) Cronquist	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon pseudospectabilis M. E. Jones	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon purpusii Brandegee	PLANTAGINACEAE	SNOW MOUNTAIN BEARDTONGUE	native	
Penstemon rattanii A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon rattanii A. Gray var. kleei (Greene) A. Gray	PLANTAGINACEAE	SANTA CRUZ MOUNTAINS BEARDTONGUE	native	
Penstemon rattanii A. Gray var. rattanii	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon roezlii Regel	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon rostriflorus Kellogg	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon rupicola (Piper) Howell	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon rydbergii A. Nelson	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon rydbergii A. Nelson var. oreocharis (Greene) N. H. Holmgren	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon scapoides D. D. Keck	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon speciosus Lindl.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon spectabilis Thurb. ex A. Gray	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon spectabilis Thurb. var. spectabilis	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon spectabilis Thurb. var. subviscosus (D. D. Keck) McMinn	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon stephensii Brandegee	PLANTAGINACEAE	STEPHENS' BEARDTONGUE	native	
Penstemon strictus Benth.	PLANTAGINACEAE		naturalized	
Penstemon sudans M. E. Jones	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon thompsoniae (A. Gray) Rydb.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon thurberi Torr.	PLANTAGINACEAE	THURBER'S BEARDTONGUE	native	
Penstemon tracyi D. D. Keck	PLANTAGINACEAE	TRACY'S BEARDTONGUE	native	
Penstemon utahensis Eastw.	PLANTAGINACEAE	BEARDTONGUE	native	
Penstemon venustus Lindl.	PLANTAGINACEAE	BEARDTONGUE	naturalized	
Pentachaeta alsinoides Greene	ASTERACEAE		native	
Pentachaeta aurea Nutt.	ASTERACEAE	GOLDEN-RAYED PENTACHAETA	native	
Pentachaeta bellidiflora Greene	ASTERACEAE	WHITE-RAYED PENTACHAETA	native	
Pentachaeta exilis (A. Gray) A. Gray	ASTERACEAE		native	
Pentachaeta exilis (A. Gray) A. Gray subsp. aeolica Van Horn & Ornduff	ASTERACEAE	SLENDER PENTACHAETA	native	
Pentachaeta exilis (A. Gray) A. Gray subsp. exilis	ASTERACEAE		native	
Pentachaeta fragilis Brandegee	ASTERACEAE		native	
Pentachaeta lyonii A. Gray	ASTERACEAE	LYON'S PENTACHAETA	native	
Pentagramma pallida (Weath.) Yatsk., Windham & E. Wollenw.	PTERIDACEAE	GOLDBACK FERN; SILVERBACK FERN	native	
Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw.	PTERIDACEAE	GOLDBACK FERN; SILVERBACK FERN	native	
Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw. subsp. maxonii (Weath.) Yatsk., Windham & E. Wollenw.	PTERIDACEAE	GOLDBACK FERN; SILVERBACK FERN	native	
Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw. subsp. triangularis	PTERIDACEAE	GOLDBACK FERN; SILVERBACK FERN	native	
Pentagramma triangularis (Kaulf.) Yatsk., Windham & E. Wollenw. subsp. viscosa (D. C. Eaton) Yatsk., Windham & E. Wollenw.	PTERIDACEAE	GOLDBACK FERN; SILVERBACK FERN	native	
Peraphyllum ramosissimum Nutt.	ROSACEAE	WILD CRAB APPLE	native	
Pericallis hybrida B. Nord.	ASTERACEAE		naturalized	
Pericome caudata A. Gray	ASTERACEAE		native	
Perideridia bacigalupii T. I. Chuang & Constance	APIACEAE	BACIGALUPI'S PERIDERIDIA	native	
Perideridia bolanderi (A. Gray) A. Nelson & J. F. Macbr.	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia bolanderi (A. Gray) A. Nelson & J. F. Macbr. subsp. bolanderi	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia bolanderi (A. Gray) A. Nelson & J. F. Macbr. subsp. involucrata T. I. Chuang & Constance	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia californica (Torr.) A. Nelson & J. F. Macbr.	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia gairdneri (Hook. & Arn.) Mathias	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia gairdneri (Hook. & Arn.) Mathias subsp. borealis T. I. Chuang & Constance	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia gairdneri (Hook. & Arn.) Mathias subsp. gairdneri	APIACEAE	GAIRDNER'S YAMPAH	native	
Perideridia howellii (J. M. Coult. & Rose) Mathias	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia kelloggii (A. Gray) Mathias	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia lemmonii (J. M. Coult. & Rose) T. I. Chuang & Constance	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia leptocarpa T. I. Chuang & Constance	APIACEAE	NARROW-SEEDED YAMPAH	native	
Perideridia oregana (S. Watson) Mathias	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia parishii (J. M. Coult. & Rose) A. Nelson & J. F. Macbr.	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia parishii (J. M. Coult. & Rose) A. Nelson & J. F. Macbr. subsp. latifolia (A. Gray) T. I. Chuang & Constance	APIACEAE	SQUAWROOT; YAMPAH	native	
Perideridia parishii (J. M. Coult. & Rose) A. Nelson & J. F. Macbr. subsp. parishii	APIACEAE	PARISH'S YAMPAH	native	
Perideridia pringlei (J. M. Coult. & Rose) A. Nelson & J. F. Macbr.	APIACEAE	PRINGLE'S YAMPAH	native	
Perityle emoryi Torr.	ASTERACEAE		native	
Perityle inyoensis (Ferris) A. M. Powell	ASTERACEAE	INYO LAPHAMIA	native	
Perityle megalocephala (S. Watson) J. F. Macbr.	ASTERACEAE		native	
Perityle megalocephala (S. Watson) J. F. Macbr. var. megalocephala	ASTERACEAE		native	
Perityle megalocephala (S. Watson) J. F. Macbr. var. oligophylla A. M. Powell	ASTERACEAE		native	
Perityle villosa (S. F. Blake) Shinners	ASTERACEAE	HANAUPAH LAPHAMIA	native	
Persicaria amphibia (L.) A. Gray	POLYGONACEAE		native	
Persicaria capitata (Buch.-Ham. ex D. Don) H. Gross	POLYGONACEAE		naturalized	
Persicaria hydropiper (L.) Delarbre	POLYGONACEAE		naturalized	
Persicaria hydropiperoides (Michx.) Small	POLYGONACEAE		native	
Persicaria lapathifolia (L.) Gray	POLYGONACEAE		native	
Persicaria maculosa Gray	POLYGONACEAE		naturalized	
Persicaria pensylvanica (L.) M. Gómez	POLYGONACEAE		naturalized	
Persicaria punctata (Elliott) Small	POLYGONACEAE		native	
Persicaria wallichii Greuter & Burdet	POLYGONACEAE		naturalized	
Petalonyx linearis Greene	LOASACEAE		native	
Petalonyx nitidus S. Watson	LOASACEAE		native	
Petalonyx thurberi A. Gray	LOASACEAE		native	
Petalonyx thurberi A. Gray subsp. gilmanii (Munz) W. S. Davis & H. J. Thomps.	LOASACEAE	DEATH VALLEY SANDPAPER PLANT	native	
Petalonyx thurberi A. Gray subsp. thurberi	LOASACEAE		native	
Petasites frigidus (L.) Fr.	ASTERACEAE		native	
Petasites frigidus (L.) Fr. var. palmatus (Aiton) Cronquist	ASTERACEAE	COLTSFOOT	native	
Peteria thompsoniae S. Watson	FABACEAE	SPINE-NODED MILKVETCH	native	
Petradoria pumila (Nutt.) Greene	ASTERACEAE	ROCK GOLDENROD	native	
Petradoria pumila (Nutt.) Greene subsp. pumila	ASTERACEAE	ROCK GOLDENROD	native	
Petrophytum caespitosum (Nutt.) Rydb.	ROSACEAE		native	
Petrophytum caespitosum (Nutt.) Rydb. subsp. acuminatum (Rydb.) Munz	ROSACEAE		native	
Petrophytum caespitosum (Nutt.) Rydb. subsp. caespitosum	ROSACEAE		native	
Petrorhagia dubia (Raf.) G. López & Romo	CARYOPHYLLACEAE		naturalized	
Petrorhagia nanteuilii (Burnat) P. W. Ball & Heywood	CARYOPHYLLACEAE		naturalized	
Petrorhagia prolifera (L.) P. W. Ball & Heywood	CARYOPHYLLACEAE		naturalized	
Petroselinum crispum (Mill.) A. W. Hill	APIACEAE	PARSLEY	naturalized	
Petunia parviflora Juss.	SOLANACEAE		native	
Petunia violacea Lindl.	SOLANACEAE		naturalized	acceptance uncertain
Peucephyllum schottii A. Gray	ASTERACEAE	PYGMY-CEDAR	native	
Phacelia adenophora J. T. Howell	BORAGINACEAE		native	
Phacelia affinis A. Gray	BORAGINACEAE		native	
Phacelia anelsonii J. F. Macbr.	BORAGINACEAE	AVEN NELSON'S PHACELIA	native	
Phacelia argentea A. Nelson & J.F. Macbr.	BORAGINACEAE	SAND DUNE PHACELIA	native	
Phacelia austromontana J. T. Howell	BORAGINACEAE		native	
Phacelia barnebyana J. T. Howell	BORAGINACEAE		native	
Phacelia bicolor S. Watson var. bicolor	BORAGINACEAE		native	
Phacelia bicolor Torr. ex S. Watson	BORAGINACEAE		native	
Phacelia bolanderi A. Gray	BORAGINACEAE		native	
Phacelia brachyloba (Benth.) A. Gray	BORAGINACEAE		native	
Phacelia breweri A. Gray	BORAGINACEAE		native	
Phacelia californica Cham.	BORAGINACEAE		native	
Phacelia calthifolia Brand	BORAGINACEAE		native	
Phacelia campanularia A. Gray	BORAGINACEAE		native	
Phacelia campanularia A. Gray subsp. campanularia	BORAGINACEAE		native	
Phacelia campanularia A. Gray subsp. vasiformis G. W. Gillett	BORAGINACEAE		native	
Phacelia cicutaria Greene	BORAGINACEAE		native	
Phacelia cicutaria Greene var. cicutaria	BORAGINACEAE		native	
Phacelia cicutaria Greene var. hispida (A. Gray) J. T. Howell	BORAGINACEAE		native	
Phacelia cicutaria Greene var. hubbyi (J. F. Macbr.) J. T. Howell	BORAGINACEAE		native	
Phacelia ciliata Benth.	BORAGINACEAE		native	
Phacelia coerulea Greene	BORAGINACEAE		native	
Phacelia congdonii Greene	BORAGINACEAE		native	
Phacelia cookei Constance & Heckard	BORAGINACEAE	COOKE'S PHACELIA	native	
Phacelia corymbosa Jeps.	BORAGINACEAE		native	
Phacelia crenulata Torr. ex S. Watson	BORAGINACEAE		native	
Phacelia crenulata Torr. ex S. Watson var. ambigua (M. E. Jones) J. F. Macbr.	BORAGINACEAE		native	
Phacelia crenulata Torr. ex S. Watson var. crenulata	BORAGINACEAE		native	
Phacelia crenulata Torr. ex S. Watson var. minutiflora (J. W. Voss) Jeps.	BORAGINACEAE		native	
Phacelia cryptantha Greene	BORAGINACEAE		native	
Phacelia curvipes Torr. ex S. Watson	BORAGINACEAE		native	
Phacelia dalesiana J. T. Howell	BORAGINACEAE	SCOTT MOUNTAIN PHACELIA	native	
Phacelia davidsonii A. Gray	BORAGINACEAE		native	
Phacelia distans Benth.	BORAGINACEAE		native	
Phacelia divaricata (Benth.) A. Gray	BORAGINACEAE		native	
Phacelia douglasii (Benth.) Torr.	BORAGINACEAE		native	
Phacelia egena (Brand) J. T. Howell	BORAGINACEAE		native	
Phacelia eisenii Brandegee	BORAGINACEAE		native	
Phacelia exilis (A. Gray) G. J. Lee	BORAGINACEAE	TRANSVERSE RANGE PHACELIA	native	
Phacelia floribunda Greene	BORAGINACEAE	SAN CLEMENTE ISLAND PHACELIA	native	
Phacelia fremontii Torr.	BORAGINACEAE		native	
Phacelia glandulifera Piper	BORAGINACEAE		native	
Phacelia grandiflora (Benth.) A. Gray	BORAGINACEAE		native	
Phacelia greenei J. T. Howell	BORAGINACEAE	SCOTT VALLEY PHACELIA	native	
Phacelia grisea A. Gray	BORAGINACEAE		native	
Phacelia gymnoclada Torr. ex S. Watson	BORAGINACEAE		native	
Phacelia hastata Douglas ex Lehm.	BORAGINACEAE		native	
Phacelia hastata Douglas ex Lehm. subsp. compacta (Brand) Heckard	BORAGINACEAE		native	
Phacelia hastata Douglas ex Lehm. subsp. hastata	BORAGINACEAE		native	
Phacelia heterophylla Pursh	BORAGINACEAE		native	
Phacelia heterophylla Pursh subsp. virgata (Greene) Heckard	BORAGINACEAE		native	
Phacelia humilis Torr. & A. Gray	BORAGINACEAE		native	
Phacelia humilis Torr. & A. Gray var. dudleyi J. T. Howell	BORAGINACEAE		native	
Phacelia humilis Torr. & A. Gray var. humilis	BORAGINACEAE		native	
Phacelia hydrophylloides Torr. ex A. Gray	BORAGINACEAE		native	
Phacelia imbricata Greene	BORAGINACEAE		native	
Phacelia imbricata Greene subsp. imbricata	BORAGINACEAE		native	
Phacelia imbricata Greene subsp. patula (Brand) Heckard	BORAGINACEAE		native	
Phacelia insularis Munz	BORAGINACEAE		native	
Phacelia insularis Munz var. continentis J. T. Howell	BORAGINACEAE	NORTHCOAST PHACELIA	native	
Phacelia insularis Munz var. insularis	BORAGINACEAE	NORTH CHANNEL ISLANDS PHACELIA	native	
Phacelia inundata J. T. Howell	BORAGINACEAE	PLAYA PHACELIA	native	
Phacelia inyoensis (J. F. Macbr.) J. T. Howell	BORAGINACEAE	INYO PHACELIA	native	
Phacelia ivesiana Torr.	BORAGINACEAE		native	
Phacelia lemmonii A. Gray	BORAGINACEAE		native	
Phacelia leonis J. T. Howell	BORAGINACEAE	SISKIYOU PHACELIA	native	
Phacelia linearis (Pursh) Holz.	BORAGINACEAE		native	
Phacelia longipes Torr. ex A. Gray	BORAGINACEAE		native	
Phacelia lyonii A. Gray	BORAGINACEAE		native	
Phacelia malvifolia Cham.	BORAGINACEAE		native	
Phacelia marcescens Eastw. ex J. F. Macbr.	BORAGINACEAE		native	
Phacelia minor (Harv.) Thell. ex F. Zimm.	BORAGINACEAE		native	
Phacelia mohavensis A. Gray	BORAGINACEAE	MOJAVE PHACELIA	native	
Phacelia monoensis Halse	BORAGINACEAE	MONO COUNTY PHACELIA	native	
Phacelia mustelina Coville	BORAGINACEAE	DEATH VALLEY ROUND-LEAVED PHACELIA	native	
Phacelia mutabilis Greene	BORAGINACEAE		native	
Phacelia nashiana Jeps.	BORAGINACEAE	CHARLOTTE'S PHACELIA	native	
Phacelia neglecta M. E. Jones	BORAGINACEAE		native	
Phacelia nemoralis Greene	BORAGINACEAE		native	
Phacelia nemoralis Greene subsp. nemoralis	BORAGINACEAE		native	
Phacelia nemoralis Greene subsp. oregonensis Heckard	BORAGINACEAE		native	
Phacelia novenmillensis Munz	BORAGINACEAE	NINE-MILE CANYON PHACELIA	native	
Phacelia orogenes Brand	BORAGINACEAE	MOUNTAIN PHACELIA	native	
Phacelia pachyphylla A. Gray	BORAGINACEAE		native	
Phacelia parishii A. Gray	BORAGINACEAE	PARISH'S PHACELIA	native	
Phacelia parryi Torr.	BORAGINACEAE		native	
Phacelia pedicellata A. Gray	BORAGINACEAE		native	
Phacelia peirsoniana J. T. Howell	BORAGINACEAE		native	
Phacelia perityloides Coville	BORAGINACEAE		native	
Phacelia perityloides Coville var. jaegeri Munz	BORAGINACEAE		native	
Phacelia perityloides Coville var. perityloides	BORAGINACEAE		native	
Phacelia phacelioides (Benth.) Brand	BORAGINACEAE	MOUNT DIABLO PHACELIA	native	
Phacelia platyloba A. Gray	BORAGINACEAE		native	
Phacelia pringlei A. Gray	BORAGINACEAE		native	
Phacelia procera A. Gray	BORAGINACEAE		native	
Phacelia pulchella A. Gray	BORAGINACEAE		native	
Phacelia pulchella A. Gray var. gooddingii (Brand) J. T. Howell	BORAGINACEAE	GOODDING'S PHACELIA	native	
Phacelia purpusii Brandegee	BORAGINACEAE		native	
Phacelia quickii J. T. Howell	BORAGINACEAE		native	
Phacelia racemosa (Kellogg) Brandegee	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm.	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. austrolitoralis Munz	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. eremophila (Greene) J. F. Macbr.	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. latifolia (Torr.) Cronquist	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. montereyensis Munz	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. ramosissima	BORAGINACEAE		native	
Phacelia ramosissima Douglas ex Lehm. var. subglabra M. Peck	BORAGINACEAE		native	
Phacelia rattanii A. Gray	BORAGINACEAE		native	
Phacelia rotundifolia Torr. ex S. Watson	BORAGINACEAE		native	
Phacelia saxicola A. Gray	BORAGINACEAE		native	
Phacelia sericea (Graham) A. Gray	BORAGINACEAE		native	
Phacelia sericea (Graham) A. Gray var. ciliosa Rydb.	BORAGINACEAE	BLUE ALPINE PHACELIA	native	
Phacelia stebbinsii Constance & Heckard	BORAGINACEAE	STEBBINS' PHACELIA	native	
Phacelia stellaris Brand	BORAGINACEAE	BRAND'S PHACELIA	native	
Phacelia suaveolens Greene	BORAGINACEAE		native	
Phacelia suaveolens Greene var. keckii (Munz & I. M. Johnst.) J. T. Howell	BORAGINACEAE	SANTIAGO PEAK PHACELIA	native	
Phacelia suaveolens Greene var. suaveolens	BORAGINACEAE		native	
Phacelia tanacetifolia Benth.	BORAGINACEAE		native	
Phacelia tetramera J. T. Howell	BORAGINACEAE		native	
Phacelia thermalis Greene	BORAGINACEAE		native	
Phacelia umbrosa Greene	BORAGINACEAE		native	
Phacelia vallicola Congdon ex Brand	BORAGINACEAE	MARIPOSA PHACELIA	native	
Phacelia vallis-mortae J. W. Voss	BORAGINACEAE		native	
Phacelia viscida (Benth. ex Lindl.) Torr.	BORAGINACEAE		native	
Phalacroseris bolanderi A. Gray	ASTERACEAE		native	
Phalaris angusta Nees ex Trin.	POACEAE		native	
Phalaris aquatica L.	POACEAE	HARDING GRASS	naturalized	
Phalaris arundinacea L.	POACEAE	REED CANARY GRASS	native	
Phalaris brachystachys Link	POACEAE		naturalized	
Phalaris californica Hook. & Arn.	POACEAE		native	
Phalaris canariensis L.	POACEAE	CANARY GRASS	naturalized	
Phalaris caroliniana Walter	POACEAE		naturalized	
Phalaris lemmonii Vasey	POACEAE		native	
Phalaris minor Retz.	POACEAE		naturalized	
Phalaris paradoxa L.	POACEAE		naturalized	
Phaseolus filiformis Benth.	FABACEAE	SLENDER-STEMMED BEAN; WRIGHT'S PHASEOLUS	native	
Philadelphus lewisii Pursh	PHILADELPHACEAE	WILD MOCK ORANGE	native	
Philadelphus microphyllus A. Gray	PHILADELPHACEAE	LITTLELEAF MOCK ORANGE	native	
Phleum alpinum L.	POACEAE	MOUNTAIN TIMOTHY	native	
Phleum pratense L.	POACEAE	CULTIVATED TIMOTHY	naturalized	
Phlox adsurgens Torr. ex A. Gray	POLEMONIACEAE		native	
Phlox austromontana Coville	POLEMONIACEAE		native	
Phlox caespitosa Nutt.	POLEMONIACEAE		native	
Phlox condensata (A. Gray) E. E. Nelson	POLEMONIACEAE		native	
Phlox diffusa Benth.	POLEMONIACEAE		native	
Phlox dispersa Sharsm.	POLEMONIACEAE	HIGH SIERRA PHLOX	native	
Phlox dolichantha A. Gray	POLEMONIACEAE	BEAR VALLEY PHLOX	native	
Phlox hirsuta E. E. Nelson	POLEMONIACEAE	YREKA PHLOX	native	
Phlox hoodii Richardson	POLEMONIACEAE		native	
Phlox hoodii Richardson subsp. canescens (Torr. & A. Gray) Wherry	POLEMONIACEAE		native	
Phlox muscoides Nutt.	POLEMONIACEAE	MOSS PHLOX	native	
Phlox pulvinata (Wherry) Cronquist	POLEMONIACEAE		native	
Phlox speciosa Pursh	POLEMONIACEAE		native	
Phlox speciosa Pursh subsp. nitida (Suksd.) Wherry	POLEMONIACEAE		native	
Phlox speciosa Pursh subsp. occidentalis (Durand) Wherry	POLEMONIACEAE		native	
Phlox stansburyi (Torr.) A. Heller	POLEMONIACEAE		native	
Phoenicaulis cheiranthoides Nutt.	BRASSICACEAE		native	
Phoenix canariensis Chabaud	ARECACEAE	CANARY ISLAND DATE PALM	naturalized	
Phoenix dactylifera L.	ARECACEAE	DATE; DATE PALM	naturalized	
Pholisma arenarium Nutt. ex Hook.	BORAGINACEAE		native	
Pholisma sonorae (Torr. ex A. Gray) Yatsk.	BORAGINACEAE	SAND FOOD	native	
Pholistoma auritum (Lindl.) Lilja	BORAGINACEAE		native	
Pholistoma auritum (Lindl.) Lilja var. arizonicum (M. E. Jones) Constance	BORAGINACEAE	ARIZONA PHOLISTOMA	native	
Pholistoma auritum (Lindl.) Lilja var. auritum	BORAGINACEAE	FIESTA FLOWER	native	
Pholistoma membranaceum (Benth.) Constance	BORAGINACEAE		native	
Pholistoma racemosum (Nutt. ex A. Gray) Constance	BORAGINACEAE		native	
Phoradendron bolleanum (Seem.) Eichler	VISCACEAE		native	
Phoradendron californicum Nutt.	VISCACEAE	DESERT MISTLETOE	native	
Phoradendron juniperinum A. Gray	VISCACEAE	JUNIPER MISTLETOE	native	
Phoradendron serotinum (Raf.) M. C. Johnst.	VISCACEAE		native	
Phoradendron serotinum (Raf.) M. C. Johnst. subsp. macrophyllum (Engelm.) Kuijt	VISCACEAE		native	
Phoradendron serotinum (Raf.) M. C. Johnst. subsp. tomentosum (DC.) Kuijt	VISCACEAE		native	
Phragmites australis (Cav.) Steud.	POACEAE	COMMON REED	native	
Phragmites australis (Cav.) Steud. subsp. americanus Saltonstall, P. M. Peterson, & Soreng	POACEAE		native	acceptance uncertain
Phragmites australis (Cav.) Steud. subsp. berlandieri (E. Fourn.) Saltonstall & Hauber	POACEAE		native	acceptance uncertain
Phyla caespitosa (Rusby) Moldenke	VERBENACEAE		naturalized	acceptance uncertain
Phyla lanceolata (Michx.) Greene	VERBENACEAE		native	
Phyla nodiflora (L.) Greene	VERBENACEAE		native	
Phyla nodiflora (L.) Greene var. incisa (Small) Moldenke	VERBENACEAE		native	
Phyla nodiflora (L.) Greene var. nodiflora	VERBENACEAE		native	
Phyllanthus caroliniensis Walt. subsp. caroliniensis	EUPHORBIACEAE		naturalized	acceptance uncertain
Phyllodoce breweri (A. Gray) Maxim.	ERICACEAE	MOUNTAIN HEATHER	native	
Phyllodoce empetriformis (Sm.) D. Don	ERICACEAE	MOUNTAIN HEATHER	native	
Phyllospadix scouleri Hook.	ZOSTERACEAE	SURF-GRASS	native	
Phyllospadix torreyi S. Watson	ZOSTERACEAE	SURF-GRASS	native	
Phyllostachys aurea Rivière & C. Rivière	POACEAE		naturalized	acceptance uncertain
Phyllostachys bambusoides Siebold & Zuccarini	POACEAE		naturalized	acceptance uncertain
Physalis acutifolia (Miers) Sandwith	SOLANACEAE	GROUND-CHERRY	native	
Physalis crassifolia Benth.	SOLANACEAE	GROUND-CHERRY	native	
Physalis hederifolia A. Gray	SOLANACEAE	GROUND-CHERRY	native	
Physalis hederifolia A. Gray var. fendleri (A. Gray) Cronquist	SOLANACEAE	GROUND-CHERRY	native	
Physalis hederifolia A. Gray var. palmeri (A. Gray) C. L. Hitchc.	SOLANACEAE	GROUND-CHERRY	native	
Physalis lancifolia Nees	SOLANACEAE	GROUND-CHERRY	naturalized	
Physalis lobata Torr.	SOLANACEAE	LOBED GROUND-CHERRY	native	
Physalis philadelphica Lam.	SOLANACEAE	TOMATILLO	naturalized	
Physalis pubescens L.	SOLANACEAE	GROUND-CHERRY	naturalized	
Physalis pubescens L. var. grisea Waterf.	SOLANACEAE	GROUND-CHERRY	naturalized	
Physalis pubescens L. var. integrifolia (Dunal) Waterf.	SOLANACEAE	GROUND-CHERRY	naturalized	
Physaria chambersii Rollins	BRASSICACEAE	DOUBLE BLADDERPOD	native	
Physaria kingii (S. Watson) O'Kane & Al-Shehbaz	BRASSICACEAE		native	
Physaria kingii (S. Watson) O'Kane & Al-Shehbaz subsp. bernardina (Munz) O'Kane & Al-Shehbaz	BRASSICACEAE		native	
Physaria kingii (S. Watson) O'Kane & Al-Shehbaz subsp. kingii	BRASSICACEAE		native	
Physaria kingii (S. Watson) O'Kane & Al-Shehbaz subsp. latifolia (A. Nelson) O'Kane & Al-Shehbaz	BRASSICACEAE		native	
Physaria occidentalis (S. Watson) O'Kane & Al-Shehbaz	BRASSICACEAE		native	
Physaria occidentalis (S. Watson) O'Kane & Al-Shehbaz subsp. occidentalis	BRASSICACEAE		native	
Physaria tenella (A. Nelson) O'Kane & Al-Shehbaz	BRASSICACEAE		native	
Physocarpus alternans (M. E. Jones) J. T. Howell	ROSACEAE	NINEBARK	native	
Physocarpus capitatus (Pursh) Kuntze	ROSACEAE	NINEBARK	native	
Phytolacca americana L.	PHYTOLACCACEAE	PIGEONBERRY; POKEBERRY; POKEWEED	naturalized	
Phytolacca americana L. var. americana	PHYTOLACCACEAE		naturalized	
Phytolacca icosandra L.	PHYTOLACCACEAE		naturalized	
Picea breweriana S. Watson	PINACEAE	BREWER SPRUCE	native	
Picea engelmannii Engelm.	PINACEAE	ENGELMANN SPRUCE	native	
Picea sitchensis (Bong.) Carrière	PINACEAE	SITKA SPRUCE	native	
Pickeringia montana Nutt.	FABACEAE		native	
Pickeringia montana Nutt. var. montana	FABACEAE		native	
Pickeringia montana Nutt. var. tomentosa (Abrams) I. M. Johnst.	FABACEAE		native	
Pilostyles thurberi A. Gray	RAFFLESIACEAE	THURBER'S PILOSTYLES	native	
Pilularia americana A. Braun	MARSILEACEAE		native	
Pinguicula macroceras Link	LENTIBULARIACEAE		native	
Pinus albicaulis Engelm.	PINACEAE	WHITEBARK PINE	native	
Pinus attenuata Lemmon	PINACEAE	KNOBCONE PINE	native	
Pinus balfouriana Grev. & Balf.	PINACEAE	FOXTAIL PINE	native	
Pinus balfouriana Grev. & Balf. subsp. austrina R. J. Mastrog. & J. D. Mastrog.	PINACEAE	PINE	native	
Pinus balfouriana Grev. & Balf. subsp. balfouriana	PINACEAE	PINE	native	
Pinus contorta Loudon	PINACEAE	LODGEPOLE PINE	native	
Pinus contorta Loudon subsp. bolanderi (Parl.) Critchf.	PINACEAE	BOLANDER PINE	native	
Pinus contorta Loudon subsp. contorta	PINACEAE	SHORE PINE	native	
Pinus contorta Loudon subsp. murrayana (Grev. & Balf.) Critchf.	PINACEAE	LODGEPOLE PINE	native	
Pinus coulteri D. Don	PINACEAE	COULTER PINE	native	
Pinus edulis Engelm.	PINACEAE	COLORADO PINYON	native	
Pinus flexilis E. James	PINACEAE	LIMBER PINE	native	
Pinus jeffreyi Grev. & Balf.	PINACEAE	JEFFREY PINE	native	
Pinus lambertiana Douglas	PINACEAE	SUGAR PINE	native	
Pinus longaeva D. K. Bailey	PINACEAE	WESTERN BRISTLECONE PINE	native	
Pinus monophylla Torr. & Frém.	PINACEAE	SINGLELEAF PINYON PINE	native	
Pinus monticola Douglas ex D. Don	PINACEAE	WESTERN WHITE PINE	native	
Pinus muricata D. Don	PINACEAE	BISHOP PINE	native	
Pinus pinea L.	PINACEAE		naturalized	
Pinus ponderosa Douglas ex Lawson & C. Lawson	PINACEAE	PACIFIC PONDEROSA PINE	native	
Pinus quadrifolia Parl. ex Sudw.	PINACEAE	PARRY PINYON PINE	native	
Pinus radiata D. Don	PINACEAE	MONTEREY PINE	native	
Pinus sabiniana D. Don	PINACEAE	FOOTHILL PINE; GRAY PINE	native	
Pinus torreyana Parry ex Carrière	PINACEAE	TORREY PINE	native	
Pinus torreyana Parry ex Carrière subsp. insularis J. R. Haller	PINACEAE		native	
Pinus torreyana Parry ex Carrière subsp. torreyana	PINACEAE		native	
Pinus washoensis H. Mason & Stockw.	PINACEAE	WASHOE PINE	native	
Piperia candida Rand. Morgan & Ackerman	ORCHIDACEAE	WHITE FLOWERED PIPERIA	native	
Piperia colemanii Rand. Morgan & Glicenstein	ORCHIDACEAE		native	
Piperia cooperi (S. Watson) Rydb.	ORCHIDACEAE	PIPERIA	native	
Piperia elegans (Lindl.) Rydb.	ORCHIDACEAE	PIPERIA	native	
Piperia elegans (Lindl.) Rydb. subsp. decurtata Rand. Morgan & Glicenstein	ORCHIDACEAE		native	
Piperia elegans (Lindl.) Rydb. subsp. elegans	ORCHIDACEAE		native	
Piperia elongata Rydb.	ORCHIDACEAE	PIPERIA	native	
Piperia leptopetala Rydb.	ORCHIDACEAE	PIPERIA	native	
Piperia michaelii (Greene) Rydb.	ORCHIDACEAE	MICHAEL'S PIPERIA	native	
Piperia transversa Suksd.	ORCHIDACEAE	PIPERIA	native	
Piperia unalascensis (Spreng.) Rydb.	ORCHIDACEAE	PIPERIA	native	
Piperia yadonii Rand. Morgan & Ackerman	ORCHIDACEAE	YADON'S PIPERIA	native	
Piptatherum micranthum (Trin. & Rupr.) Barkworth	POACEAE	SMALL-FLOWERED RICEGRASS	native	
Piptatherum miliaceum (L.) Coss.	POACEAE	SMILO GRASS	naturalized	
Piptochaetium ovatum (Trin.) E. Desv.	POACEAE		naturalized	acceptance uncertain
Piptochaetium ovatum (Trin.) E. Desv. var. purpurascens Hack.	POACEAE		naturalized	acceptance uncertain
Piptochaetium setosum (Trin.) Arechav.	POACEAE		naturalized	
Piptochaetium stipoides (Trin. & Rupr.) Hack.	POACEAE		naturalized	
Pistacia atlantica Desf.	ANACARDIACEAE	PISTACHIO	naturalized	
Pisum sativum L.	FABACEAE	FIELD PEA; GARDEN PEA; SUGAR PEA	naturalized	
Pittosporum crassifolium Banks & Sol.	PITTOSPORACEAE		naturalized	
Pittosporum tenuifolium Gaertn.	PITTOSPORACEAE		naturalized	
Pittosporum tobira (Thunb.) Aiton	PITTOSPORACEAE	JAPANESE PITTOSPORUM; MOCK ORANGE	naturalized	
Pittosporum undulatum Vent.	PITTOSPORACEAE	MOCK ORANGE; VICTORIAN BOX	naturalized	
Pityopus californicus (Eastw.) H. F. Copel.	ERICACEAE		native	
Plagiobothrys acanthocarpus (Piper) I. M. Johnst.	BORAGINACEAE	ADOBE ALLOCARYA	native	
Plagiobothrys arizonicus (A. Gray) A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys austiniae (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys bracteatus (Howell) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys canescens Benth.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys chorisianus (Cham.) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys chorisianus (Cham.) I. M. Johnst. var. chorisianus	BORAGINACEAE	CHORIS'S POPCORNFLOWER	native	
Plagiobothrys chorisianus (Cham.) I. M. Johnst. var. hickmanii (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys cognatus (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys collinus (Phil.) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys collinus (Phil.) I. M. Johnst. var. californicus (A. Gray) Higgins	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys collinus (Phil.) I. M. Johnst. var. fulvescens (I. M. Johnst.) Higgins	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys collinus (Phil.) I. M. Johnst. var. gracilis (I. M. Johnst.) Higgins	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys collinus (Phil.) I. M. Johnst. var. ursinus (A. Gray) Higgins	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys cusickii (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys distantiflorus (Piper) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys fulvus (Hook. & Arn.) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys glyptocarpus (Piper) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys glyptocarpus (Piper) I. M. Johnst. var. glyptocarpus	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys glyptocarpus (Piper) I. M. Johnst. var. modestus I. M. Johnst.	BORAGINACEAE	CEDAR CREST POPCORNFLOWER	native	
Plagiobothrys greenei (A. Gray) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys hispidulus (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys hispidus A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys humistratus (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys infectivus I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys jonesii A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys kingii (S. Watson) A. Gray	BORAGINACEAE	GREAT BASIN POPCORNFLOWER	native	
Plagiobothrys kingii (S. Watson) A. Gray var. harknessii (Greene) Jeps.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys kingii (S. Watson) A. Gray var. kingii	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys leptocladus (Greene) I. M. Johnst.	BORAGINACEAE	ALKALI PLAGIOBOTHRYS	native	
Plagiobothrys mollis (A. Gray) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys mollis (A. Gray) I. M. Johnst. var. mollis	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys myosotoides (Lehm.) Brand	BORAGINACEAE	FORGET-ME-NOT POPCORNFLOWER	native	
Plagiobothrys nothofulvus (A. Gray) A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys parishii I. M. Johnst.	BORAGINACEAE	PARISH'S POPCORNFLOWER	native	
Plagiobothrys reticulatus (Piper) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys reticulatus (Piper) I. M. Johnst. var. reticulatus	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys reticulatus (Piper) I. M. Johnst. var. rossianorum I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys salsus (Brandegee) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys scriptus (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys shastensis A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys stipitatus (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys stipitatus (Greene) I. M. Johnst. var. micranthus (Piper) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys stipitatus (Greene) I. M. Johnst. var. stipitatus	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys strictus (Greene) I. M. Johnst.	BORAGINACEAE	CALISTOGA POPCORNFLOWER	native	
Plagiobothrys tenellus (Nutt. ex Hook.) A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys tener (Greene) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys torreyi (A. Gray) A. Gray	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys torreyi (A. Gray) A. Gray var. diffusus I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys torreyi (A. Gray) A. Gray var. torreyi	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys trachycarpus (A. Gray) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plagiobothrys uncinatus J. T. Howell	BORAGINACEAE	HOOKED POPCORNFLOWER	native	
Plagiobothrys undulatus (Piper) I. M. Johnst.	BORAGINACEAE	POPCORNFLOWER	native	
Plantago arenaria Waldst. & Kit.	PLANTAGINACEAE		naturalized	
Plantago aristata Michx.	PLANTAGINACEAE	PLANTAIN	naturalized	
Plantago coronopus L.	PLANTAGINACEAE	PLANTAIN	naturalized	
Plantago elongata Pursh	PLANTAGINACEAE	PLANTAIN	native	
Plantago erecta E. Morris	PLANTAGINACEAE	PLANTAIN	native	
Plantago eriopoda Torr.	PLANTAGINACEAE	PLANTAIN	native	
Plantago lanceolata L.	PLANTAGINACEAE	ENGLISH PLANTAIN	naturalized	
Plantago major L.	PLANTAGINACEAE	COMMON PLANTAIN	naturalized	
Plantago maritima L.	PLANTAGINACEAE	PLANTAIN	native	
Plantago ovata Forssk.	PLANTAGINACEAE	PLANTAIN	native	
Plantago ovata Forssk. var. fastigiata (Morris) S. C. Meyers & A. Liston	PLANTAGINACEAE		native	
Plantago ovata Forssk. var. insularis (Eastw.) S. C. Meyers & A. Liston	PLANTAGINACEAE		native	
Plantago patagonica Jacq.	PLANTAGINACEAE	PLANTAIN	native	
Plantago pusilla Nutt.	PLANTAGINACEAE	PLANTAIN	naturalized	
Plantago rhodosperma Decne.	PLANTAGINACEAE		native	
Plantago subnuda Pilg.	PLANTAGINACEAE	PLANTAIN	native	
Plantago truncata Cham.	PLANTAGINACEAE	PLANTAIN	naturalized	
Plantago truncata Cham. subsp. firma (Kunze) Pilg.	PLANTAGINACEAE	PLANTAIN	naturalized	
Plantago virginica L.	PLANTAGINACEAE	PLANTAIN	naturalized	
Platanthera dilatata (Pursh) Lindl. ex Beck var. leucostachys (Lindl.) Luer	ORCHIDACEAE		native	
Platanthera dilatata (Pursh) Lindl. ex L. C. Beck	ORCHIDACEAE		native	
Platanthera sparsiflora (S. Watson) Schltr.	ORCHIDACEAE	SPARSE-FLOWERED BOG-ORCHID	native	
Platanthera stricta Lindl.	ORCHIDACEAE	SLENDER BOG-ORCHID	native	
Platanthera tescamnis Sheviak & W. F. Jenn.	ORCHIDACEAE		native	
Platanthera yosemitensis Colwell, Sheviak, & P.E. Moore	ORCHIDACEAE		native	
Platanus racemosa Nutt.	PLATANACEAE	WESTERN SYCAMORE	native	
Platystemon californicus Benth.	PAPAVERACEAE	CREAM CUPS	native	
Plectritis brachystemon Fisch. & C. A. Mey.	VALERIANACEAE		native	
Plectritis ciliosa (Greene) Jeps.	VALERIANACEAE		native	
Plectritis ciliosa (Greene) Jeps. subsp. ciliosa	VALERIANACEAE		native	
Plectritis ciliosa (Greene) Jeps. subsp. insignis (Suksd.) Morey	VALERIANACEAE		native	
Plectritis congesta (Lindl.) DC.	VALERIANACEAE	SEA BLUSH	native	
Plectritis macrocera Torr. & A. Gray	VALERIANACEAE		native	
Pleiacanthus spinosus (Nutt.) Rydb.	ASTERACEAE		native	
Pleuraphis jamesii Torr.	POACEAE	GALLETA	native	
Pleuraphis rigida Thurb.	POACEAE	BIG GALLETA	native	
Pleuricospora fimbriolata A. Gray	ERICACEAE		native	
Pleurocoronis pluriseta (A. Gray) R. M. King & H. Rob.	ASTERACEAE	ARROW-LEAF	native	
Pleuropogon californicus (Nees) Benth. ex Vasey	POACEAE	SEMAPHORE GRASS	native	
Pleuropogon hooverianus (L. D. Benson) J. T. Howell	POACEAE	NORTH COAST SEMAPHORE GRASS	native	
Pleuropogon refractus (A. Gray) Benth. ex Vasey	POACEAE	NODDING SEMAPHORE GRASS	native	
Pluchea odorata (L.) Cass.	ASTERACEAE	SALT MARSH FLEABANE	native	
Pluchea sericea (Nutt.) Coville	ASTERACEAE	ARROW WEED	native	
Plumbago auriculata Lam.	PLUMBAGINACEAE		naturalized	acceptance uncertain
Poa abbreviata R. Br. subsp. marshii Soreng	POACEAE		native	
Poa abbreviata R. Br. subsp. pattersonii (Vasey) Á. Löve, D. Löve & B. M. Kapoor	POACEAE		native	
Poa annua L.	POACEAE	ANNUAL BLUEGRASS	naturalized	
Poa atropurpurea Scribn.	POACEAE	SAN BERNARDINO BLUEGRASS	native	
Poa bigelovii Vasey & Scribn.	POACEAE	BLUEGRASS	native	
Poa bolanderi Vasey	POACEAE	BLUEGRASS	native	
Poa bulbosa L.	POACEAE	BULBOUS BLUEGRASS	naturalized	
Poa bulbosa L. var. bulbosa	POACEAE		naturalized	acceptance uncertain
Poa bulbosa L. var. vivipara Koch	POACEAE		naturalized	
Poa compressa L.	POACEAE	CANADIAN BLUEGRASS	naturalized	
Poa confinis Vasey	POACEAE	BEACH BLUEGRASS	native	
Poa cusickii Vasey	POACEAE	BLUEGRASS	native	
Poa cusickii Vasey subsp. cusickii	POACEAE	BLUEGRASS	native	
Poa cusickii Vasey subsp. epilis (Scribn.) W. A. Weber	POACEAE	SKYLINE BLUEGRASS	native	
Poa cusickii Vasey subsp. pallida Soreng	POACEAE	BLUEGRASS	native	
Poa cusickii Vasey subsp. purpurascens (Vasey) Soreng	POACEAE	BLUEGRASS	native	
Poa diaboli Soreng & D. J. Keil	POACEAE		native	acceptance uncertain
Poa douglasii Nees	POACEAE	SAND-DUNE BLUEGRASS	native	
Poa fendleriana (Steud.) Vasey	POACEAE	BLUEGRASS	native	
Poa fendleriana (Steud.) Vasey subsp. longiligula (Scribn. & T. A. Williams) Soreng	POACEAE	LONGTONGUE MUTTON GRASS	native	
Poa glauca Vahl	POACEAE	BLUEGRASS	native	
Poa glauca Vahl subsp. rupicola (Nash ex Rydb.) W. A. Weber	POACEAE	TIMBERLINE BLUEGRASS	native	
Poa howellii Vasey & Scribn.	POACEAE	BLUEGRASS	native	
Poa infirma Kunth	POACEAE	WEAK BLUEGRASS	naturalized	
Poa keckii Soreng	POACEAE	BLUEGRASS	native	
Poa kelloggii Vasey	POACEAE	BLUEGRASS	native	
Poa leptocoma Trin.	POACEAE	BLUEGRASS	native	
Poa leptocoma Trin. subsp. leptocoma	POACEAE	BOG BLUEGRASS	native	
Poa lettermanii Vasey	POACEAE	BLUEGRASS	native	
Poa macrantha Vasey	POACEAE	LARGE-FLOWERED SAND-DUNE BLUEGRASS	native	
Poa napensis Beetle	POACEAE	NAPA BLUEGRASS	native	
Poa nemoralis L.	POACEAE	WOOD BLUEGRASS	naturalized	
Poa palustris L.	POACEAE	FOWL BLUEGRASS	naturalized	
Poa piperi Hitchc.	POACEAE	PIPER'S BLUEGRASS	native	
Poa pratensis L.	POACEAE	BLUEGRASS	naturalized	
Poa pratensis L. subsp. pratensis	POACEAE	KENTUCKY BLUEGRASS	naturalized	
Poa pringlei Scribn.	POACEAE	BLUEGRASS	native	
Poa rhizomata Hitchc.	POACEAE	TIMBER BLUEGRASS	native	
Poa secunda J. Presl	POACEAE	BLUEGRASS	native	
Poa secunda J. Presl subsp. juncifolia (Scribn.) Soreng	POACEAE	BLUEGRASS	native	
Poa secunda J. Presl subsp. secunda	POACEAE	ONE-SIDED BLUEGRASS	native	
Poa sierrae J. T. Howell	POACEAE	BLUEGRASS	native	
Poa stebbinsii Soreng	POACEAE	BLUEGRASS	native	
Poa tenerrima Scribn.	POACEAE	DELICATE BLUEGRASS	native	
Poa trivialis L.	POACEAE	ROUGH BLUEGRASS	naturalized	
Poa unilateralis Scribn. ex Vasey	POACEAE	OCEAN-BLUFF BLUEGRASS	native	
Poa wheeleri Vasey	POACEAE	BLUEGRASS	native	
Podistera nevadensis (A. Gray) S. Watson	APIACEAE	SIERRA PODISTERA	native	
Pogogyne abramsii J. T. Howell	LAMIACEAE	SAN DIEGO MESA MINT	native	
Pogogyne clareana J. T. Howell	LAMIACEAE	SANTA LUCIA MINT	native	
Pogogyne douglasii Benth.	LAMIACEAE		native	
Pogogyne floribunda Jokerst	LAMIACEAE	PROFUSE-FLOWERED POGOYNE	native	
Pogogyne nudiuscula A. Gray	LAMIACEAE	OTAY MESA MINT	native	
Pogogyne serpylloides (Torr.) A. Gray	LAMIACEAE		native	
Pogogyne zizyphoroides Benth.	LAMIACEAE		native	
Polanisia dodecandra (L.) DC.	BRASSICACEAE	CLAMMY WEED	native	
Polanisia dodecandra (L.) DC. subsp. trachysperma (Torr. & A. Gray) H. H. Iltis	BRASSICACEAE	CLAMMY WEED	native	
Polemonium californicum Eastw.	POLEMONIACEAE		native	
Polemonium carneum A. Gray	POLEMONIACEAE		native	
Polemonium chartaceum H. Mason	POLEMONIACEAE	MASON'S SKY PILOT	native	
Polemonium eximium Greene	POLEMONIACEAE	SKY PILOT	native	
Polemonium micranthum Benth.	POLEMONIACEAE		native	
Polemonium occidentale Greene	POLEMONIACEAE		native	
Polemonium occidentale Greene subsp. occidentale	POLEMONIACEAE		native	
Polemonium pulcherrimum Hook.	POLEMONIACEAE		native	
Polemonium pulcherrimum Hook. var. pilosum (Greenm.) Brand	POLEMONIACEAE		native	
Polemonium pulcherrimum Hook. var. pulcherrimum	POLEMONIACEAE		native	
Poliomintha incana (Torr.) A. Gray	LAMIACEAE		native	
Polycarpon depressum Nutt.	CARYOPHYLLACEAE	POLYCARP	native	
Polycarpon tetraphyllum (L.) L.	CARYOPHYLLACEAE	FOUR-LEAVED ALLSEED	naturalized	
Polycarpon tetraphyllum (L.) L. var. tetraphyllum	CARYOPHYLLACEAE		naturalized	
Polyctenium fremontii (S. Watson) Greene	BRASSICACEAE		native	
Polyctenium fremontii (S. Watson) Greene var. confertum Rollins	BRASSICACEAE		native	
Polyctenium fremontii (S. Watson) Greene var. fremontii	BRASSICACEAE		native	
Polyctenium williamsiae Rollins	BRASSICACEAE		native	acceptance uncertain
Polygala acanthoclada A. Gray	POLYGALACEAE	MILKWORT	native	
Polygala californica Nutt.	POLYGALACEAE	MILKWORT	native	
Polygala cornuta Kellogg	POLYGALACEAE	MILKWORT	native	
Polygala cornuta Kellogg var. cornuta	POLYGALACEAE	MILKWORT	native	
Polygala cornuta Kellogg var. fishiae (Parry) Jeps.	POLYGALACEAE	FISH'S MILKWORT	native	
Polygala heterorhyncha (Barneby) T. Wendt	POLYGALACEAE	NOTCH-BEAKED MILKWORT	native	
Polygala intermontana T. Wendt	POLYGALACEAE	MILKWORT	native	
Polygala myrtifolia L.	POLYGALACEAE		naturalized	acceptance uncertain
Polygala subspinosa S. Watson	POLYGALACEAE	SPINY MILKWORT	native	
Polygonum argyrocoleon Kunze	POLYGONACEAE	KNOTWEED; SMARTWEED	naturalized	
Polygonum austiniae Greene	POLYGONACEAE		native	
Polygonum aviculare L.	POLYGONACEAE		naturalized	
Polygonum aviculare L. subsp. aviculare	POLYGONACEAE		naturalized	
Polygonum aviculare L. subsp. depressum (Meisn.) Arcang.	POLYGONACEAE		naturalized	
Polygonum bidwelliae S. Watson	POLYGONACEAE	BIDWELL'S KNOTWEED	native	
Polygonum bolanderi W. H. Brewer	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum californicum Meisn.	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum douglasii Greene	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum fowleri B. L. Rob.	POLYGONACEAE		native	
Polygonum fowleri B. L. Rob. subsp. fowleri	POLYGONACEAE		native	
Polygonum hickmanii H. R. Hinds & Rand. Morgan	POLYGONACEAE		native	
Polygonum majus (Meisn.) Piper	POLYGONACEAE		native	
Polygonum marinense T. R. Mert. & P. H. Raven	POLYGONACEAE	MARIN KNOTWEED	native	
Polygonum minimum S. Watson	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum paronychia Cham. & Schltdl.	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum parryi Greene	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum polygaloides Meisn.	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum polygaloides Meisn. subsp. confertiflorum (Nutt. ex Piper) J. C. Hickman	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum polygaloides Meisn. subsp. esotericum (L. C. Wheeler) J. C. Hickman	POLYGONACEAE	MODOC COUNTY KNOTWEED	native	
Polygonum polygaloides Meisn. subsp. kelloggii (Greene) J. C. Hickman	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum ramosissimum Michx.	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum ramosissimum Michx. subsp. prolificum (Small) Costea & Tardif	POLYGONACEAE		naturalized	
Polygonum ramosissimum Michx. subsp. ramosissimum	POLYGONACEAE		native	
Polygonum sawatchense Small	POLYGONACEAE		native	
Polygonum sawatchense Small subsp. oblivium Costea & Tardif	POLYGONACEAE		native	
Polygonum sawatchense Small subsp. sawatchense	POLYGONACEAE		native	
Polygonum shastense W. H. Brewer	POLYGONACEAE	KNOTWEED; SMARTWEED	native	
Polygonum spergulariiforme Meisn. ex Small	POLYGONACEAE		native	
Polypodium californicum Kaulf.	POLYPODIACEAE	CALIFORNIA POLYPODY	native	
Polypodium calirhiza S. A. Whitmore & A. R. Sm.	POLYPODIACEAE	POLYPODY	native	
Polypodium glycyrrhiza D. C. Eaton	POLYPODIACEAE	LICORICE FERN	native	
Polypodium hesperium Maxon	POLYPODIACEAE	WESTERN POLYPODY	native	
Polypodium scouleri Hook. & Grev.	POLYPODIACEAE	LEATHER-LEAF FERN	native	
Polypogon australis Brongn.	POACEAE	CHILEAN BEARD GRASS	naturalized	
Polypogon imberbis (Phil.) Johow	POACEAE		naturalized	acceptance uncertain
Polypogon interruptus Kunth	POACEAE	DITCH BEARD GRASS	naturalized	
Polypogon maritimus Willd.	POACEAE	MEDITERRANEAN BEARD GRASS	naturalized	
Polypogon monspeliensis (L.) Desf.	POACEAE	ANNUAL BEARD GRASS	naturalized	
Polystichum californicum (D. C. Eaton) Diels	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum dudleyi Maxon	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum imbricans (D. C. Eaton) D.H. Wagner	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum imbricans (D. C. Eaton) D.H. Wagner subsp. curtum (Ewan) D.H. Wagner	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum imbricans (D. C. Eaton) D.H. Wagner subsp. imbricans	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum kruckebergii W. H. Wagner	DRYOPTERIDACEAE	KRUCKEBERG'S SWORD FERN	native	
Polystichum lemmonii Underw.	DRYOPTERIDACEAE	SWORD FERN	native	
Polystichum lonchitis (L.) Roth	DRYOPTERIDACEAE	HOLLY FERN	native	
Polystichum munitum (Kaulf.) C. Presl	DRYOPTERIDACEAE	WESTERN SWORD FERN	native	
Polystichum scopulinum (D. C. Eaton) Maxon	DRYOPTERIDACEAE	SWORD FERN	native	
Populus alba L.	SALICACEAE	WHITE POPLAR	naturalized	
Populus angustifolia E. James	SALICACEAE	NARROW-LEAVED COTTONWOOD	native	
Populus fremontii S. Watson	SALICACEAE	ASPEN; COTTONWOOD; POPLAR	native	
Populus fremontii S. Watson subsp. fremontii	SALICACEAE	ALAMO COTTONWOOD; FREMONT COTTONWOOD	native	
Populus nigra L. var. italica Du Roi	SALICACEAE		naturalized	acceptance uncertain
Populus nigra L. var. nigra	SALICACEAE		naturalized	acceptance uncertain
Populus tremuloides Michx.	SALICACEAE	QUAKING ASPEN	native	
Porophyllum gracile Benth.	ASTERACEAE	ODORA	native	
Porterella carnosula (Hook. & Arn.) Torr.	CAMPANULACEAE		native	
Portulaca halimoides L.	PORTULACACEAE		native	
Portulaca oleracea L.	PORTULACACEAE	COMMON PURSLANE	naturalized	
Potamogeton alpinus Balb.	POTAMOGETONACEAE	PONDWEED	native	
Potamogeton amplifolius Tuck.	POTAMOGETONACEAE	BROAD-LEAVED PONDWEED	native	
Potamogeton berchtoldii Fieber	POTAMOGETONACEAE		native	
Potamogeton crispus L.	POTAMOGETONACEAE	CRISPATE-LEAVED PONDWEED	naturalized	
Potamogeton diversifolius Raf.	POTAMOGETONACEAE	DIVERSE-LEAVED PONDWEED	native	
Potamogeton epihydrus Raf.	POTAMOGETONACEAE	PONDWEED	native	
Potamogeton foliosus Raf.	POTAMOGETONACEAE	LEAFY PONDWEED	native	
Potamogeton foliosus Raf. subsp. fibrillosus (Fernald) R. R. Haynes & Hellq.	POTAMOGETONACEAE		native	
Potamogeton foliosus Raf. subsp. foliosus	POTAMOGETONACEAE		native	
Potamogeton gramineus L.	POTAMOGETONACEAE	GRASS-LEAVED PONDWEED	native	
Potamogeton illinoensis Morong	POTAMOGETONACEAE	SHINING PONDWEED	native	
Potamogeton natans L.	POTAMOGETONACEAE	FLOATING-LEAVED PONDWEED	native	
Potamogeton nodosus Poir.	POTAMOGETONACEAE	LONG-LEAVED PONDWEED	native	
Potamogeton praelongus Wulfen	POTAMOGETONACEAE	WHITE-STEMMED PONDWEED	native	
Potamogeton pusillus L.	POTAMOGETONACEAE	SMALL PONDWEED	native	
Potamogeton richardsonii (A. Benn.) Rydb.	POTAMOGETONACEAE	RICHARDSON'S PONDWEED	native	
Potamogeton robbinsii Oakes	POTAMOGETONACEAE	ROBBINS' PONDWEED	native	
Potamogeton zosteriformis Fernald	POTAMOGETONACEAE	EEL-GRASS PONDWEED	native	
Potentilla anglica Laichard.	ROSACEAE		naturalized	
Potentilla anserina L.	ROSACEAE	CINQUEFOIL	native	
Potentilla anserina L. subsp. anserina	ROSACEAE	CINQUEFOIL	native	
Potentilla anserina L. subsp. pacifica (Howell) Rousi	ROSACEAE	CINQUEFOIL	native	
Potentilla basaltica Tiehm & Ertter	ROSACEAE		native	
Potentilla biennis Greene	ROSACEAE	CINQUEFOIL	native	
Potentilla concinna Richardson	ROSACEAE	ALPINE CINQUEFOIL	native	
Potentilla concinna Richardson var. proxima (Rydb.) S. L. Welsh	ROSACEAE		native	
Potentilla cristae Ferlatte & Strother	ROSACEAE	CRESTED POTENTILLA	native	
Potentilla diversifolia Lehm.	ROSACEAE	CINQUEFOIL	native	
Potentilla diversifolia Lehm. var. diversifolia	ROSACEAE	CINQUEFOIL	native	
Potentilla drummondii Lehm.	ROSACEAE	CINQUEFOIL	native	
Potentilla drummondii Lehm. subsp. breweri (S. Watson) Ertter	ROSACEAE	CINQUEFOIL	native	
Potentilla drummondii Lehm. subsp. bruceae (Rydb.) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla drummondii Lehm. subsp. drummondii	ROSACEAE	CINQUEFOIL	native	
Potentilla flabellifolia Hook. ex Torr. & A. Gray	ROSACEAE	FAN-FOIL	native	
Potentilla fruticosa L.	ROSACEAE	SHRUBBY CINQUEFOIL	native	
Potentilla glandulosa Lindl.	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. ashlandica (Greene) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. ewanii D. D. Keck	ROSACEAE	EWAN'S CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. glandulosa	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. globosa D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. hansenii (Greene) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. nevadensis (S. Watson) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. pseudorupestris (Rydb.) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla glandulosa Lindl. subsp. reflexa (Greene) D. D. Keck	ROSACEAE	CINQUEFOIL	native	
Potentilla gracilis Hook.	ROSACEAE	CINQUEFOIL	native	
Potentilla gracilis Hook. var. elmeri (Rydb.) Jeps.	ROSACEAE	CINQUEFOIL	native	
Potentilla gracilis Hook. var. fastigiata (Nutt.) S. Watson	ROSACEAE	CINQUEFOIL	native	
Potentilla gracilis Hook. var. flabelliformis (Lehm.) Torr. & A. Gray	ROSACEAE	CINQUEFOIL	native	
Potentilla gracilis Hook. var. gracilis	ROSACEAE	CINQUEFOIL	native	
Potentilla grayi S. Watson	ROSACEAE	CINQUEFOIL	native	
Potentilla hickmanii Eastw.	ROSACEAE	HICKMAN'S CINQUEFOIL	native	
Potentilla millefolia Rydb.	ROSACEAE	CINQUEFOIL	native	
Potentilla morefieldii Ertter	ROSACEAE	MOREFIELD'S CINQUEFOIL	native	
Potentilla newberryi A. Gray	ROSACEAE	NEWBERRY'S CINQUEFOIL	native	
Potentilla norvegica L.	ROSACEAE	CINQUEFOIL	naturalized	
Potentilla palustris (L.) Scop.	ROSACEAE	CINQUEFOIL	native	
Potentilla pensylvanica L.	ROSACEAE	CINQUEFOIL	native	
Potentilla pensylvanica L. var. ovium Jeps.	ROSACEAE		native	
Potentilla pseudosericea Rydb.	ROSACEAE	CINQUEFOIL	native	
Potentilla pulcherrima Lehm.	ROSACEAE		native	
Potentilla recta L.	ROSACEAE	CINQUEFOIL	naturalized	
Potentilla rimicola (Munz & I. M. Johnst.) Ertter	ROSACEAE	CLIFF CINQUEFOIL	native	
Potentilla rivalis Nutt.	ROSACEAE	CINQUEFOIL	native	
Potentilla wheeleri S. Watson	ROSACEAE	CINQUEFOIL	native	
Prenanthella exigua (A. Gray) Rydb.	ASTERACEAE		native	
Primula suffrutescens A. Gray	PRIMULACEAE	SIERRA PRIMROSE	native	
Proboscidea althaeifolia (Benth.) Decne.	MARTYNIACEAE	DESERT UNICORN PLANT	native	
Proboscidea louisianica (Mill.) Thell.	MARTYNIACEAE	DEVIL'S CLAW; UNICORN PLANT	naturalized	
Proboscidea louisianica (Mill.) Thell. subsp. louisianica	MARTYNIACEAE	COMMON UNICORN PLANT	naturalized	
Proboscidea lutea (Lindl.) Stapf	MARTYNIACEAE	DEVIL'S CLAW; UNICORN PLANT	naturalized	
Prosartes hookeri Torr.	COLCHICACEAE		native	
Prosartes smithii (Hook.) Utech, Shinwari, & Kawano	LILIACEAE		native	
Prosopis glandulosa Torr.	FABACEAE	MESQUITE	native	
Prosopis glandulosa Torr. var. torreyana (L. D. Benson) M. C. Johnst.	FABACEAE	HONEY MESQUITE; MESQUITE	native	
Prosopis pubescens Benth.	FABACEAE	SCREW BEAN; TORNILLO	native	
Prosopis velutina Wooton	FABACEAE	MESQUITE	naturalized	
Prunella vulgaris L.	LAMIACEAE	SELF-HEAL	native	
Prunella vulgaris L. var. lanceolata (W. P. C. Barton) Fernald	LAMIACEAE	SELF-HEAL	native	
Prunella vulgaris L. var. vulgaris	LAMIACEAE	SELF-HEAL	naturalized	
Prunus andersonii A. Gray	ROSACEAE	DESERT PEACH	native	
Prunus avium L.	ROSACEAE		naturalized	acceptance uncertain
Prunus cerasifera Ehrh.	ROSACEAE	CHERRY PLUM	naturalized	
Prunus dulcis (Mill.) D. A. Webb	ROSACEAE	ALMOND	naturalized	
Prunus emarginata (Douglas) Eaton	ROSACEAE	BITTER CHERRY	native	
Prunus eremophila Prigge	ROSACEAE		native	acceptance uncertain
Prunus fasciculata (Torr.) A. Gray	ROSACEAE	DESERT ALMOND	native	
Prunus fasciculata (Torr.) A. Gray var. fasciculata	ROSACEAE		native	
Prunus fasciculata (Torr.) A. Gray var. punctata Jeps.	ROSACEAE		native	
Prunus fremontii S. Watson	ROSACEAE	DESERT APRICOT	native	
Prunus ilicifolia (Nutt. ex Hook. & Arn.) Walp.	ROSACEAE		native	
Prunus ilicifolia (Nutt. ex Hook. & Arn.) Walp. subsp. ilicifolia	ROSACEAE	HOLLY-LEAFED CHERRY; ISLAY	native	
Prunus ilicifolia (Nutt. ex Hook. & Arn.) Walp. subsp. lyonii (Eastw.) P. H. Raven	ROSACEAE	CATALINA CHERRY	native	
Prunus laurocerasus L.	ROSACEAE		naturalized	
Prunus subcordata Benth.	ROSACEAE		native	
Prunus virginiana L.	ROSACEAE		native	
Prunus virginiana L. var. demissa (Nutt.) Torr.	ROSACEAE	WESTERN CHOKE-CHERRY	native	
Psathyrotes annua (Nutt.) A. Gray	ASTERACEAE		native	
Psathyrotes ramosissima (Torr.) A. Gray	ASTERACEAE	TURTLEBACK	native	
Pseudobahia bahiifolia (Benth.) Rydb.	ASTERACEAE	HARTWEG'S PSEUDOBAHIA	native	
Pseudobahia heermannii (Durand) Rydb.	ASTERACEAE		native	
Pseudobahia peirsonii Munz	ASTERACEAE	TULARE PSEUDOBAHIA	native	
Pseudognaphalium beneolens (Davidson) Anderb.	ASTERACEAE		native	
Pseudognaphalium canescens (DC.) Anderb.	ASTERACEAE		native	
Pseudognaphalium microcephalum (Nutt.) Anderb.	ASTERACEAE		native	
Pseudognaphalium roseum (Kunth) Anderb.	ASTERACEAE		native	
Pseudognaphalium thermale (E. E. Nelson) G. L. Nesom	ASTERACEAE		native	
Pseudoroegneria spicata (Pursh) Á. Löve	POACEAE		native	
Pseudoroegneria spicata (Pursh) Á. Löve subsp. spicata	POACEAE		native	
Pseudosasa japonica (Sieb. & Zucc. ex Steud.) Makino ex Nakai	POACEAE		naturalized	acceptance uncertain
Pseudostellaria jamesiana (Torr.) W. A. Weber & R. L. Hartm.	CARYOPHYLLACEAE		native	
Pseudostellaria sierrae Rabeler & R. L. Hartm.	CARYOPHYLLACEAE		native	
Pseudotrillium rivale (S. Watson) S. Farmer	MELANTHIACEAE		native	acceptance uncertain
Pseudotsuga macrocarpa (Vasey) Mayr	PINACEAE	BIGCONE DOUGLAS-FIR; BIGCONE SPRUCE	native	
Pseudotsuga menziesii (Mirb.) Franco	PINACEAE	DOUGLAS-FIR	native	
Pseudotsuga menziesii (Mirb.) Franco var. menziesii	PINACEAE	DOUGLAS-FIR	native	
Psilocarphus brevissimus Nutt.	ASTERACEAE	WOOLLY MARBLES; WOOLLY-HEADS	native	
Psilocarphus brevissimus Nutt. var. brevissimus	ASTERACEAE	DWARF WOOLLY-HEADS	native	
Psilocarphus brevissimus Nutt. var. multiflorus Cronquist	ASTERACEAE	DELTA WOOLLY MARBLES	native	
Psilocarphus chilensis A.Gray	ASTERACEAE		native	
Psilocarphus elatior (A. Gray) A. Gray	ASTERACEAE	TALL WOOLLY-HEADS	native	
Psilocarphus oregonus Nutt.	ASTERACEAE	OREGON WOOLLY-HEADS	native	
Psilocarphus tenellus Nutt.	ASTERACEAE	WOOLLY MARBLES; WOOLLY-HEADS	native	
Psilostrophe cooperi (A. Gray) Greene	ASTERACEAE	PAPER-DAISY	native	
Psorothamnus arborescens (A. Gray) Barneby	FABACEAE		native	
Psorothamnus arborescens (A. Gray) Barneby var. arborescens	FABACEAE	MOJAVE INDIGO BUSH	native	
Psorothamnus arborescens (A. Gray) Barneby var. minutifolius (Parish) Barneby	FABACEAE		native	
Psorothamnus arborescens (A. Gray) Barneby var. simplicifolius (Parish) Barneby	FABACEAE		native	
Psorothamnus emoryi (A. Gray) Rydb.	FABACEAE		native	
Psorothamnus fremontii (Torr. ex A. Gray) Barneby	FABACEAE		native	
Psorothamnus fremontii (Torr. ex A. Gray) Barneby var. attenuatus Barneby	FABACEAE		native	
Psorothamnus fremontii (Torr. ex A. Gray) Barneby var. fremontii	FABACEAE		native	
Psorothamnus polydenius (Torr.) Rydb.	FABACEAE		native	
Psorothamnus schottii (Torr.) Barneby	FABACEAE		native	
Psorothamnus spinosus (A. Gray) Barneby	FABACEAE	SMOKE TREE	native	
Ptelea crenulata Greene	RUTACEAE	HOP TREE	native	
Pteridium aquilinum (L.) Kuhn	DENNSTAEDTIACEAE	BRACKEN; BRAKE	native	
Pteridium aquilinum (L.) Kuhn var. pubescens Underw.	DENNSTAEDTIACEAE	BRACKEN; BRAKE	native	
Pteris cretica L.	PTERIDACEAE	CRETAN BRAKE	naturalized	
Pteris tremula R. Br.	PTERIDACEAE	BRAKE	naturalized	
Pteris vittata L.	PTERIDACEAE	BRAKE	naturalized	
Pterospora andromedea Nutt.	ERICACEAE	PINEDROPS	native	
Pterostegia drymarioides Fisch. & C. A. Mey.	POLYGONACEAE		native	
Ptilagrostis kingii (Bol.) Barkworth	POACEAE	KING'S RICEGRASS	native	
Puccinellia distans (Jacq.) Parl.	POACEAE	EUROPEAN ALKALI GRASS	naturalized	
Puccinellia howellii J. I Davis	POACEAE	HOWELL'S ALKALI GRASS	native	
Puccinellia lemmonii (Vasey) Scribn.	POACEAE	LEMMON'S ALKALI GRASS	native	
Puccinellia nutkaensis (J. Presl) Fernald & Weath.	POACEAE	ALASKA ALKALI GRASS	native	
Puccinellia nuttalliana (Schult.) Hitchc.	POACEAE	NUTTALL'S ALKALI GRASS	native	
Puccinellia parishii Hitchc.	POACEAE	PARISH'S ALKALI GRASS	native	
Puccinellia pumila (Vasey) Hitchc.	POACEAE	DWARF ALKALI GRASS	native	
Puccinellia simplex Scribn.	POACEAE	ALKALI GRASS	native	
Pulicaria paludosa Link	ASTERACEAE		naturalized	
Punica granatum L.	LYTHRACEAE	POMEGRANATE	naturalized	
Purshia mexicana (D. Don) S. L. Welsh	ROSACEAE	ANTELOPE BUSH	native	
Purshia mexicana (D. Don) S. L. Welsh var. stansburyana (Torr.) S. L. Welsh	ROSACEAE	ANTELOPE BUSH	native	
Purshia tridentata (Pursh) DC.	ROSACEAE	ANTELOPE BUSH	native	
Purshia tridentata (Pursh) DC. var. glandulosa (Curran) M. E. Jones	ROSACEAE	ANTELOPE BUSH	native	
Purshia tridentata (Pursh) DC. var. tridentata	ROSACEAE	ANTELOPE BUSH	native	
Pycnanthemum californicum Torr. ex Durand	LAMIACEAE		native	
Pyracantha angustifolia (Franch.) C. K. Schneid.	ROSACEAE	FIRETHORN	naturalized	
Pyracantha crenatoserrata (Hance) Rehder	ROSACEAE		naturalized	
Pyrola asarifolia Michx.	ERICACEAE	SHINLEAF; WINTERGREEN	native	
Pyrola asarifolia Michx. subsp. asarifolia	ERICACEAE	BOG WINTERGREEN	native	
Pyrola asarifolia Michx. subsp. bracteata (Hook.) Haber	ERICACEAE	LONG-BRACTED WINTERGREEN	native	
Pyrola chlorantha Sw.	ERICACEAE	GREEN-FLOWERED WINTERGREEN	native	
Pyrola minor L.	ERICACEAE	LESSER WINTERGREEN	native	
Pyrola picta Sm.	ERICACEAE	WHITE-VEINED WINTERGREEN	native	
Pyrrocoma apargioides (A. Gray) Greene	ASTERACEAE		native	
Pyrrocoma carthamoides Hook.	ASTERACEAE		native	
Pyrrocoma carthamoides Hook. var. cusickii (A. Gray) Kartesz & Gandhi	ASTERACEAE		native	
Pyrrocoma hirta (A. Gray) Greene	ASTERACEAE		native	
Pyrrocoma hirta (A. Gray) Greene var. hirta	ASTERACEAE		native	
Pyrrocoma hirta (A. Gray) Greene var. lanulosa (Greene) G. K. Br. & D. J. Keil	ASTERACEAE		native	
Pyrrocoma lanceolata (Hook.) Greene	ASTERACEAE		native	
Pyrrocoma lanceolata (Hook.) Greene var. lanceolata	ASTERACEAE		native	
Pyrrocoma lanceolata (Hook.) Greene var. subviscosa (Greene) G. K. Br. & D. J. Keil	ASTERACEAE		native	
Pyrrocoma lucida (D. D. Keck) Kartesz & Gandhi	ASTERACEAE		native	
Pyrrocoma racemosa (Nutt.) Torr. & A. Gray	ASTERACEAE		native	
Pyrrocoma racemosa (Nutt.) Torr. & A. G