| TJM1 | TJM2
|
|---|
| Abronia gracilis | excluded (misidentification) |
| Acacia elata | excluded |
| Acacia farnesiana var. farnesiana | Vachellia farnesiana (L.) Wight & Arn. var. farnesiana |
| Acacia greggii | Senegalia greggii (A. Gray) Britton & Rose |
| Acer glabrum var. greenei | Acer glabrum Torr. var. glabrum |
| Acer glabrum var. torreyi | Acer glabrum Torr. var. glabrum |
| Acer negundo var. californicum | Acer negundo L. |
| Achnatherum aridum | Stipa arida M.E. Jones |
| Achnatherum brachychaetum | Stipa brachychaeta Godr. |
| Achnatherum coronatum | Stipa coronata Thurb. |
| Achnatherum diegoense | Stipa diegoensis Swallen |
| Achnatherum hymenoides | Stipa hymenoides Roem. & Schult. |
| Achnatherum latiglume | Stipa latiglumis Swallen |
| Achnatherum lemmonii | Stipa lemmonii (Vasey) Scribn. |
| Achnatherum lettermanii | Stipa lettermanii Vasey |
| Achnatherum nevadense | Stipa nevadensis B.L. Johnson |
| Achnatherum occidentale | Stipa occidentalis S. Watson |
| Achnatherum parishii | Stipa parishii Vasey var. parishii |
| Achnatherum pinetorum | Stipa pinetorum M.E. Jones |
| Achnatherum speciosum | Stipa speciosa Trin. & Rupr. |
| Achnatherum stillmanii | Stipa stillmanii Bol. |
| Achnatherum thurberianum | Stipa thurberiana Piper |
| Achnatherum webberi | Stipa webberi (Thurb.) B.L. Johnson |
| Achrachne racemosa | excluded |
| Acorus calamus | excluded (historical waif) |
| Aegilops ovata | Aegilops geniculata Roth |
| Agoseris elata | Agoseris ×elata (Nutt.) Greene |
| Agoseris glauca var. laciniata | Agoseris parviflora (Nutt.) D. Dietr. |
| Agoseris glauca var. monticola | Agoseris monticola Greene |
| Agropyron desertorum | Agropyron cristatum (L.) Gaertn. subsp. pectinatum (M. Bieb.) Tzvelev |
| Agrostis semiverticillata | Polypogon viridis (Gouan) Breistr. |
| Agrostis thurberiana | Agrostis humilis Vasey |
| Agrostis viridis | Polypogon viridis (Gouan) Breistr. |
| Aira elegantissima | Aira elegans Roem. & Schult. |
| Alhagi pseudalhagi | Alhagi maurorum Medik. |
| Alisma plantago-aquatica | Alisma triviale Pursh |
| Allium bisceptrum var. bisceptrum | Allium bisceptrum S. Watson |
| Allium diabloense | Allium diabolense (Traub) McNeal |
| Allium lacunosum var. kernensis | Allium lacunosum var. kernense McNeal & Ownbey |
| Allium sharsmithae | Allium sharsmithiae (Traub) McNeal |
| Aloe saponaria | Aloe ×schoenlandii Baker; Aloe maculata All. |
| Alyssum strigosum | misappl. to Alyssum simplex |
| Ampelodesmos mauritanica | Stipa mauritanica (Poir.) Columbus & J.P. Sm. |
| Amsinckia menziesii var. intermedia | Amsinckia intermedia Fisch. & C.A. Mey. |
| Amsinckia menziesii var. menziesii | Amsinckia menziesii (Lehm.) A. Nelson & J.F. Macbr. |
| Amsinckia vernicosa var. furcata | Amsinckia furcata Suksd. |
| Amsinckia vernicosa var. vernicosa | Amsinckia vernicosa Hook. & Arn. |
| Anchusa arvensis | excluded |
| Androsace occidentalis var. simplex | Androsace occidentalis Pursh |
| Anthemis tinctoria | Cota tinctoria (L.) Guss. |
| Antirrhinum cyathiferum | Pseudorontium cyathiferum (Benth.) Rothm. |
| Antirrhinum vexillo-calyculatum | Antirrhinum vexillocalyculatum Kellogg |
| Aponogeton distachyon | Aponogeton distachyos L. f. |
| Arabis aculeolata | excluded |
| Arabis bodiensis | Boechera bodiensis (Rollins) Al-Shehbaz |
| Arabis breweri | Boechera breweri (S. Watson) Al-Shehbaz |
| Arabis breweri var. austiniae | Boechera breweri subsp. shastaensis Windham & Al-Shehbaz |
| Arabis breweri var. breweri | Boechera breweri (S. Watson) Al-Shehbaz subsp. breweri |
| Arabis breweri var. pecuniaria | Boechera peirsonii Windham & Al-Shehbaz |
| Arabis cobrensis | Boechera cobrensis (M.E. Jones) Dorn |
| Arabis constancei | Boechera constancei (Rollins) Al-Shehbaz |
| Arabis davidsonii | Boechera davidsonii (Greene) N.H. Holmgren |
| Arabis dispar | Boechera dispar (M.E. Jones) Al-Shehbaz |
| Arabis drummondii | Boechera stricta (Graham) Al-Shehbaz |
| Arabis fernaldiana var. stylosa | Boechera evadens Windham & Al-Shehbaz |
| Arabis glabra | Turritis glabra L. |
| Arabis glabra var. furcatipilis | Turritis glabra L. |
| Arabis glabra var. glabra | Turritis glabra L. |
| Arabis glaucovalvula | Boechera glaucovalvula (M.E. Jones) Al-Shehbaz |
| Arabis hirsuta | Arabis pycnocarpa M. Hopkins |
| Arabis hirsuta var. glabrata | Arabis eschscholtziana Ledeb. |
| Arabis hirsuta var. pycnocarpa | Arabis pycnocarpa M. Hopkins var. pycnocarpa |
| Arabis hoffmannii | Boechera hoffmannii (Munz) Al-Shehbaz |
| Arabis holboellii var. pendulocarpa | Boechera pendulocarpa (A. Nelson) Windham & Al-Shehbaz |
| Arabis holboellii var. pinetorum | Boechera pinetorum (Tidestr.) Windham & Al-Shehbaz |
| Arabis holboellii var. retrofracta | Boechera retrofracta (Graham) Á. Löve & D. Löve |
| Arabis inyoensis | Boechera inyoensis (Rollins) Al-Shehbaz |
| Arabis johnstonii | Boechera johnstonii (Munz) Al-Shehbaz |
| Arabis koehleri var. stipitata | Boechera koehleri (Howell) Al-Shehbaz |
| Arabis lemmonii var. depauperata | Boechera depauperata (A. Nelson & P.B. Kenn.) Windham & Al-Shehbaz |
| Arabis lemmonii var. lemmonii | Boechera lemmonii (S. Watson) W.A. Weber |
| Arabis lyallii | Boechera lyallii (S. Watson) Dorn |
| Arabis lyallii var. lyallii | Boechera lyallii (S. Watson) Dorn |
| Arabis lyallii var. nubigena | Boechera paupercula (Greene) Windham & Al-Shehbaz |
| Arabis macdonaldiana | Arabis mcdonaldiana Eastw. |
| Arabis microphylla var. microphylla | Boechera paupercula (Greene) Windham & Al-Shehbaz |
| Arabis parishii | Boechera parishii (S. Watson) Al-Shehbaz |
| Arabis perennans | Boechera perennans (S. Watson) W.A. Weber |
| Arabis pinzlae | Boechera pinzliae (Rollins) Al-Shehbaz |
| Arabis platysperma | Boechera platysperma (A. Gray) Al-Shehbaz |
| Arabis platysperma var. howellii | Boechera howellii (S. Watson) Windham & Al-Shehbaz |
| Arabis platysperma var. platysperma | Boechera elkoensis Windham & Al-Shehbaz |
| Arabis puberula | Boechera puberula (Nutt.) Dorn |
| Arabis pulchra | Boechera pulchra (S. Watson) W.A. Weber |
| Arabis pulchra var. gracilis | Boechera xylopoda Windham & Al-Shehbaz |
| Arabis pulchra var. munciensis | Boechera lincolnensis Windham & Al-Shehbaz |
| Arabis pulchra var. pulchra | Boechera pulchra (S. Watson) W.A. Weber |
| Arabis pygmaea | Boechera pygmaea (Rollins) Al-Shehbaz |
| Arabis rectissima var. rectissima | Boechera rectissima (Greene) Al-Shehbaz |
| Arabis repanda | Boechera repanda (S. Watson) Al-Shehbaz |
| Arabis repanda var. greenei | Boechera repanda (S. Watson) Al-Shehbaz |
| Arabis repanda var. repanda | Boechera repanda (S. Watson) Al-Shehbaz |
| Arabis rigidissima var. rigidissima | Boechera rigidissima (Rollins) Al-Shehbaz |
| Arabis rollei | Boechera rollei (Rollins) Al-Shehbaz |
| Arabis shockleyi | Boechera shockleyi (Munz) Dorn |
| Arabis sparsiflora | Boechera sparsiflora (Nutt.) Dorn |
| Arabis sparsiflora var. arcuata | Boechera arcuata (Nutt.) Windham & Al-Shehbaz |
| Arabis sparsiflora var. californica | Boechera californica (Rollins) Windham & Al-Shehbaz |
| Arabis sparsiflora var. sparsiflora | Boechera sparsiflora (Nutt.) Dorn |
| Arabis sparsiflora var. subvillosa | Boechera pauciflora (Nutt.) Windham & Al-Shehbaz |
| Arabis subpinnatifida | Boechera subpinnatifida (S. Watson) Al-Shehbaz |
| Arabis suffrutescens | Boechera suffrutescens (S. Watson) Dorn |
| Arabis suffrutescens var. horizontalis | excluded |
| Arabis suffrutescens var. suffrutescens | Boechera suffrutescens (S. Watson) Dorn |
| Arabis tiehmii | Boechera tiehmii (Rollins) Al-Shehbaz |
| Arceuthobium abietinum | Arceuthobium campylopodum Engelm. |
| Arceuthobium californicum | Arceuthobium campylopodum Engelm. |
| Arceuthobium cyanocarpum | Arceuthobium campylopodum Engelm. |
| Arceuthobium divaricatum | Arceuthobium campylopodum Engelm. |
| Arceuthobium littorum | Arceuthobium campylopodum Engelm. |
| Arceuthobium monticola | Arceuthobium campylopodum Engelm. |
| Arceuthobium occidentale | Arceuthobium campylopodum Engelm. |
| Arceuthobium siskiyouense | Arceuthobium campylopodum Engelm. |
| Arceuthobium tsugense | Arceuthobium campylopodum Engelm. |
| Arctostaphylos gabrielensis | Arctostaphylos glandulosa subsp. gabrielensis (P.V. Wells) J.E. Keeley et al. |
| Arctostaphylos mendocinoensis | Arctostaphylos nummularia subsp. mendocinoensis (P.V. Wells) V.T. Parker et al. |
| Arctostaphylos tomentosa | Arctostaphylos crustacea Eastw.; Arctostaphylos tomentosa (Pursh) Lindl. |
| Arctostaphylos wellsii | Arctostaphylos pilosula Jeps. & Wiesl. |
| Arctotis stoechadifolia | Arctotis venusta Norl. |
| Arenaria aculeata | Eremogone aculeata (S. Watson) Ikonn. |
| Arenaria congesta | Eremogone congesta (Nutt.) Ikonn. |
| Arenaria congesta var. charlestonensis | Eremogone congesta var. charlestonensis (Maguire) R.L. Hartm. & Rabeler |
| Arenaria congesta var. congesta | Eremogone congesta (Nutt.) Ikonn. var. congesta |
| Arenaria congesta var. crassula | Eremogone congesta var. crassula (Maguire) R.L. Hartm. & Rabeler |
| Arenaria congesta var. simulans | Eremogone congesta var. simulans (Maguire) R.L. Hartm. & Rabeler |
| Arenaria congesta var. subcongesta | Eremogone congesta var. subcongesta (S. Watson) R.L. Hartm. & Rabeler |
| Arenaria congesta var. suffrutescens | Eremogone congesta var. suffrutescens (A. Gray) R.L. Hartm. & Rabeler |
| Arenaria kingii var. glabrescens | Eremogone kingii (S. Watson) Ikonn. var. glabrescens (S. Watson) Dorn |
| Arenaria macradenia | Eremogone macradenia (S. Watson) Ikonn. |
| Arenaria macradenia var. arcuifolia | Eremogone macradenia var. arcuifolia (Maguire) R.L. Hartm. & Rabeler |
| Arenaria macradenia var. kuschei | Eremogone macradenia var. arcuifolia (Maguire) R.L. Hartm. & Rabeler |
| Arenaria macradenia var. macradenia | Eremogone macradenia (S. Watson) Ikonn. var. macradenia |
| Arenaria ursina | Eremogone ursina (B.L. Rob.) Ikonn. |
| Argyrochosma limitanea var. limitanea | Argyrochosma limitanea (Maxon) Windham subsp. limitanea |
| Aristida californica var. californica | Aristida californica Thurb. |
| Aristida ternipes var. hamulosa | Aristida ternipes Cav. var. gentilis (Henrard) Allred |
| Arnica amplexicaulis | Arnica lanceolata Nutt. subsp. prima (Maguire) Strother & S.J. Wolf |
| Arnica diversifolia | Arnica ovata Greene |
| Arnica tomentella | Arnica nevadensis A. Gray |
| Aruncus dioicus var. pubescens | Aruncus dioicus (Walter) Fernald var. acuminatus (Rydb.) H. Hara |
| Asplenium trichomanes-ramosum | Asplenium viride Huds. |
| Aster alpigenus var. andersonii | Oreostemma alpigenum (Torr. & A. Gray) Greene var. andersonii (A. Gray) G.L. Nesom |
| Aster ascendens | Symphyotrichum ascendens (Lindl.) G.L. Nesom |
| Aster bernardinus | Symphyotrichum defoliatum (Parish) G.L. Nesom |
| Aster breweri | Eucephalus breweri (A. Gray) G.L. Nesom |
| Aster brickellioides | Eucephalus tomentellus (Greene) Greene |
| Aster campestris | Symphyotrichum campestre (Nutt.) G.L. Nesom |
| Aster chilensis | Symphyotrichum chilense (Nees) G.L. Nesom |
| Aster eatonii | Symphyotrichum bracteolatum (Nutt.) G.L. Nesom |
| Aster engelmannii | Eucephalus engelmannii (D.C. Eaton) Greene |
| Aster foliaceus | Symphyotrichum foliaceum (DC.) G.L. Nesom |
| Aster foliaceus var. lyallii | Symphyotrichum hendersonii (Fernald) G.L. Nesom |
| Aster foliaceus var. parryi | Symphyotrichum foliaceum var. parryi (D.C. Eaton) G.L. Nesom |
| Aster frondosus | Symphyotrichum frondosum (Nutt.) G.L. Nesom |
| Aster greatae | Symphyotrichum greatae (Parish) G.L. Nesom |
| Aster integrifolius | Eurybia integrifolia (Nutt.) G.L. Nesom |
| Aster ledophyllus | excluded |
| Aster lentus | Symphyotrichum lentum (Greene) G.L. Nesom |
| Aster occidentalis | Symphyotrichum spathulatum (Lindl.) G.L. Nesom |
| Aster occidentalis var. occidentalis | Symphyotrichum spathulatum (Lindl.) G.L. Nesom var. spathulatum |
| Aster occidentalis var. yosemitanus | Symphyotrichum spathulatum var. yosemitanum (A. Gray) G.L. Nesom |
| Aster oregonensis | Sericocarpus oregonensis subsp. oregonensis; Sericocarpus oregonensis subsp. californicus; Sericocarpus oregonensis Nutt. |
| Aster pauciflorus | Almutaster pauciflorus (Nutt.) Á. Löve & D. Löve |
| Aster peirsonii | Oreostemma peirsonii (Sharsm.) G.L. Nesom |
| Aster radulinus | Eurybia radulina (A. Gray) G.L. Nesom |
| Aster scopulorum | Ionactis alpina (Nutt.) Greene |
| Aster subulatus var. ligulatus | excluded |
| Astragalus bernardianus | Astragalus bernardinus M.E. Jones |
| Astragalus clarianus | Astragalus claranus Jeps. |
| Astragalus lentiginosus var. platyphyllidius | Astragalus lentiginosus var. chartaceus M.E. Jones |
| Astragalus oophorous | Astragalus oophorus S. Watson |
| Astragalus oophorous var. lavinii | Astragalus oophorus var. lavinii Barneby |
| Astragalus oophorous var. oophorous | Astragalus oophorus S. Watson var. oophorus |
| Athyrium alpestre var. americanum | Athyrium distentifolium Opiz var. americanum (Butters) Cronquist |
| Atriplex argentea var. mohavensis | Atriplex argentea var. expansa (S. Watson) S.L. Welsh & Reveal |
| Atriplex heterosperma | Atriplex micrantha Ledeb. |
| Atriplex joaquiniana | Atriplex joaquinana A. Nelson |
| Atriplex patula var. obtusa | Atriplex gmelinii Bong. var. gmelinii |
| Atriplex patula var. patula | Atriplex patula L. |
| Atriplex phyllostegia | Atriplex covillei (Standl.) J.F. Macbr. |
| Atriplex subspicata | Atriplex dioica Raf. |
| Atriplex triangularis | Atriplex prostrata DC. |
| Atriplex vallicola | Atriplex coronata var. vallicola (Hoover) S.L. Welsh |
| Avena strigosa | misappl. to Avena barbata |
| Axonopus affinis | excluded |
| Azolla mexicana | Azolla microphylla Kaulf. |
| Baccharis douglasii | Baccharis glutinosa Pers. |
| Baccharis emoryi | Baccharis salicina Torr. & A. Gray |
| Bahia dissecta | Amauriopsis dissecta (A. Gray) Rydb. |
| Baileya multiradiata var. multiradiata | Baileya multiradiata Torr. |
| Balsamorhiza hookeri var. lanata | Balsamorhiza lanata (W.M. Sharp) W.A. Weber |
| Balsamorhiza macrolepis var. macrolepis | Balsamorhiza macrolepis W.M. Sharp |
| Balsamorhiza macrolepis var. platylepis | Balsamorhiza hookeri Nutt. |
| Beta vulgaris | excluded |
| Bidens cernua var. cernua | Bidens cernua L. |
| Bidens pilosa var. pilosa | Bidens pilosa L. |
| Boehmeria nivea | Boehmeria cylindrica (L.) Sw. |
| Boerhavia intermedia | Boerhavia triquetra S. Watson var. intermedia (M.E. Jones) Spellenb. |
| Boerhavia triquetra | misappl. to Boerhavia triquetra var. intermedia |
| Boschniakia hookeri | Kopsiopsis hookeri (Walp.) Govaerts |
| Boschniakia strobilacea | Kopsiopsis strobilacea (A. Gray) Beck |
| Bothriochloa ischaemum var. songarica | Bothriochloa ischaemum (L.) Keng |
| Botrychium multifidum | Sceptridium multifidum (S.G. Gmel.) Tagawa |
| Brickellia arguta | Brickellia atractyloides var. arguta (B.L. Rob.) Jeps. |
| Brickellia arguta var. arguta | Brickellia atractyloides var. arguta (B.L. Rob.) Jeps. |
| Brickellia arguta var. odontolepis | Brickellia atractyloides A. Gray var. odontolepis (B.L. Rob.) Jeps. |
| Brickellia multiflora | Brickellia longifolia var. multiflora (Kellogg) Cronquist |
| Brickellia watsonii | Brickellia microphylla (Nutt.) A. Gray var. microphylla |
| Brodiaea californica var. californica | Brodiaea californica Lindl. |
| Brodiaea californica var. leptandra | Brodiaea leptandra (Greene) Baker |
| Brodiaea purdyi | Brodiaea minor (Benth.) S. Watson |
| Bromus alopecuros | Bromus caroli-henrici Greuter |
| Bromus anomalus | Bromus porteri (J.M. Coult.) Nash |
| Bromus carinatus var. maritimus | Bromus maritimus (Piper) Hitchc. |
| Bromus stamineus | Bromus catharticus var. elatus (E. Desv.) Planchuelo |
| Bromus trinii | Bromus arizonicus; Bromus berteroanus |
| Bryonia dioica | excluded |
| Bupleurum lancifolium | excluded |
| Caesalpinia virgata | Hoffmannseggia microphylla Torr. |
| Calandrinia ambigua | Cistanthe ambigua (S. Watson) Hershk. |
| Calandrinia maritima | Cistanthe maritima (Nutt.) Hershk. |
| Callitriche hermaphroditica | Callitriche fassettii Schotsman |
| Callitriche verna | Callitriche palustris L. |
| Calochortus weedii var. vestus | Calochortus fimbriatus H.P. McDonald |
| Caltha leptosepala var. biflora | Caltha leptosepala DC. |
| Camissonia andina | Neoholmgrenia andina (Nutt.) W.L. Wagner & Hoch |
| Camissonia arenaria | Chylismia arenaria A. Nelson |
| Camissonia bistorta | Camissoniopsis bistorta (Torr. & A. Gray) W.L. Wagner & Hoch |
| Camissonia boothii | Eremothera boothii (Douglas) W.L. Wagner & Hoch |
| Camissonia brevipes | Chylismia brevipes (A. Gray) Small |
| Camissonia californica | Eulobus californicus Torr. & A. Gray |
| Camissonia cardiophylla | Chylismia cardiophylla (Torr.) Small |
| Camissonia chamaenerioides | Eremothera chamaenerioides (A. Gray) W.L. Wagner & Hoch |
| Camissonia cheiranthifolia | Camissoniopsis cheiranthifolia (Spreng.) W.L. Wagner & Hoch |
| Camissonia claviformis | Chylismia claviformis (Torr. & Frém.) A. Heller |
| Camissonia claviformis subsp. aurantiaca | Chylismia claviformis subsp. aurantiaca (Munz) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. claviformis | Chylismia claviformis (Torr. & Frém.) A. Heller subsp. claviformis |
| Camissonia claviformis subsp. cruciformis | Chylismia claviformis subsp. cruciformis (Kellogg) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. funerea | Chylismia claviformis subsp. funerea (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. integrior | Chylismia claviformis subsp. integrior (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. lancifolia | Chylismia claviformis subsp. lancifolia (A. Heller) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. peirsonii | Chylismia claviformis subsp. peirsonii (Munz) W.L. Wagner & Hoch |
| Camissonia claviformis subsp. yumae | Chylismia claviformis subsp. yumae (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia confusa | Camissoniopsis confusa (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia graciliflora | Tetrapteron graciliflorum (Hook. & Arn.) W.L. Wagner & Hoch |
| Camissonia hardhamiae | Camissoniopsis hardhamiae (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia heterochroma | Chylismia heterochroma (S. Watson) Small |
| Camissonia hirtella | Camissoniopsis hirtella (Greene) W.L. Wagner & Hoch |
| Camissonia ignota | Camissoniopsis ignota (Jeps.) W.L. Wagner & Hoch |
| Camissonia intermedia | Camissoniopsis intermedia (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia lewisii | Camissoniopsis lewisii (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia luciae | Camissoniopsis luciae (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia micrantha | Camissoniopsis micrantha (Spreng.) W.L. Wagner & Hoch |
| Camissonia minor | Eremothera minor (A. Nelson) W.L. Wagner & Hoch |
| Camissonia munzii | Chylismia munzii (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia ovata | Taraxia ovata (Torr. & A. Gray) Small |
| Camissonia pallida | Camissoniopsis pallida (Abrams) W.L. Wagner & Hoch |
| Camissonia palmeri | Tetrapteron palmeri (S. Watson) W.L. Wagner & Hoch |
| Camissonia pterosperma | Chylismiella pterosperma (S. Watson) W.L. Wagner & Hoch |
| Camissonia refracta | Eremothera refracta (S. Watson) W.L. Wagner & Hoch |
| Camissonia robusta | Camissoniopsis robusta (P.H. Raven) W.L. Wagner & Hoch |
| Camissonia subacaulis | Taraxia subacaulis (Pursh) Rydb. |
| Camissonia tanacetifolia | Taraxia tanacetifolia (Torr. & A. Gray) Piper |
| Campanula prenanthoides | Asyneuma prenanthoides (Durand) McVaugh |
| Caragana arborescens | excluded |
| Cardamine bellidifolia var. pachyphylla | Cardamine bellidifolia L. |
| Cardamine breweri var. breweri | Cardamine breweri S. Watson |
| Cardamine breweri var. orbicularis | Cardamine breweri S. Watson |
| Cardamine californica var. californica | Cardamine californica (Nutt.) Greene |
| Cardamine californica var. cardiophylla | Cardamine californica (Nutt.) Greene |
| Cardamine californica var. cuneata | Cardamine californica (Nutt.) Greene |
| Cardamine californica var. integrifolia | Cardamine californica (Nutt.) Greene |
| Cardamine californica var. sinuata | Cardamine californica (Nutt.) Greene |
| Cardamine cordifolia var. lyallii | Cardamine cordifolia A. Gray |
| Cardamine nuttallii var. covilleana | Cardamine nuttallii Greene |
| Cardamine nuttallii var. dissecta | Cardamine nuttallii Greene |
| Cardamine nuttallii var. gemmata | Cardamine nuttallii Greene |
| Cardamine nuttallii var. nuttallii | Cardamine nuttallii Greene |
| Cardamine pachystigma var. dissectifolia | Cardamine californica (Nutt.) Greene |
| Cardamine pachystigma var. pachystigma | Cardamine pachystigma (S. Watson) Rollins |
| Cardaria chalepensis | Lepidium chalepense L. |
| Cardaria draba | Lepidium draba L. |
| Cardaria pubescens | Lepidium appelianum Al-Shehbaz |
| Carex albida | Carex lemmonii W. Boott |
| Carex amplectens | Carex fracta Mack. |
| Carex breweri var. breweri | Carex breweri Boott |
| Carex cephalophora | misappl. to Carex mesochorea |
| Carex dudleyi | Carex densa (L.H. Bailey) L.H. Bailey |
| Carex eleocharis | Carex duriuscula C.A. Mey. |
| Carex garberi | Carex hassei L.H. Bailey |
| Carex gigas | Carex scabriuscula Mack. |
| Carex heteroneura var. epapillosa | Carex heteroneura W. Boott |
| Carex heteroneura var. heteroneura | Carex heteroneura W. Boott |
| Carex hystricina | Carex hystericina Willd. |
| Carex incurviformis var. danaensis | Carex incurviformis Mack. |
| Carex lanuginosa | Carex pellita Willd. |
| Carex luzulina var. ablata | Carex luzulina Olney |
| Carex luzulina var. luzulina | Carex luzulina Olney |
| Carex molesta | excluded |
| Carex norvegica | Carex stevenii (T. Holm) Kalela |
| Carex ovalis | Carex leporina L. |
| Carex parryana var. hallii | Carex idahoa L.H. Bailey |
| Carex retroflexa var. texensis | Carex texensis (L.H. Bailey) L.H. Bailey |
| Carex scirpoidea var. pseudoscirpoidea | Carex scirpoidea Michx. subsp. pseudoscirpoidea (Rydb.) D.A. Dunlop |
| Carex vesicaria var. major | Carex exsiccata L.H. Bailey |
| Carex vesicaria var. vesicaria | Carex vesicaria L. |
| Carex viridula var. viridula | Carex viridula Michx. subsp. viridula |
| Carthamus baeticus | Carthamus creticus L. |
| Castilleja angustifolia | Castilleja chromosa A. Nelson |
| Castilleja chrymactis | excluded |
| Castilleja parviflora | Castilleja peirsonii Eastw. |
| Castilleja pruinosa | Castilleja gleasoni Elmer; Castilleja pruinosa Fernald |
| Caulanthus amplexicaulis var. amplexicaulis | Caulanthus amplexicaulis S. Watson |
| Caulanthus amplexicaulis var. barbarae | Caulanthus amplexicaulis S. Watson |
| Caulanthus coulteri var. coulteri | Caulanthus coulteri S. Watson |
| Caulanthus coulteri var. lemmonii | Caulanthus lemmonii S. Watson |
| Caulanthus crassicaulis var. crassicaulis | Caulanthus crassicaulis (Torr.) S. Watson |
| Caulanthus crassicaulis var. glaber | Caulanthus crassicaulis (Torr.) S. Watson |
| Caulanthus heterophyllus var. heterophyllus | Caulanthus heterophyllus (Nutt.) Payson |
| Caulanthus heterophyllus var. pseudosimulans | Caulanthus heterophyllus (Nutt.) Payson |
| Caulanthus major var. major | Caulanthus major (M.E. Jones) Payson |
| Caulanthus major var. nevadensis | Caulanthus major (M.E. Jones) Payson |
| Caulostramina jaegeri | Hesperidanthus jaegeri (Rollins) Al-Shehbaz |
| Ceanothus cuneatus var. rigidus | Ceanothus rigidus Nutt. |
| Ceanothus ferrisae | Ceanothus ferrisiae McMinn |
| Ceanothus greggii var. perplexans | Ceanothus perplexans Trel. |
| Ceanothus greggii var. vestitus | Ceanothus vestitus Greene |
| Ceanothus griseus | Ceanothus thyrsiflorus var. griseus Trel. |
| Ceanothus jepsonii var. albiflorus | Ceanothus jepsonii Greene |
| Ceanothus jepsonii var. jepsonii | Ceanothus jepsonii Greene |
| Ceanothus papillosus var. papillosus | Ceanothus papillosus Torr. & A. Gray |
| Ceanothus papillosus var. roweanus | Ceanothus papillosus Torr. & A. Gray |
| Ceanothus velutinus var. hookeri | Ceanothus velutinus Douglas |
| Ceanothus velutinus var. velutinus | Ceanothus velutinus Douglas |
| Cenchrus ciliaris | Pennisetum ciliare (L.) Link |
| Cenchrus incertus | Cenchrus spinifex Cav. |
| Centaurea maculosa | Centaurea stoebe L. subsp. micranthos (Gugler) Hayek |
| Centaurea nigra | Centaurea jacea subsp. nigra (L.) Bonnier & Layens |
| Centaurea squarrosa | Centaurea virgata Lam. subsp. squarrosa (Boiss.) Gugler |
| Centaurium calycosum | excluded |
| Centaurium davyi | Zeltnera davyi (Jeps.) G. Mans. |
| Centaurium exaltatum | Zeltnera exaltata (Griseb.) G. Mans.; Zeltnera namophila (Reveal et al.) G. Mans. |
| Centaurium muehlenbergii | Centaurium tenuiflorum (Hoffmanns. & Link) Janch.; Zeltnera muehlenbergii (Griseb.) G. Mans. |
| Centaurium trichanthum | Zeltnera trichantha (Griseb.) G. Mans. |
| Centaurium venustum | Zeltnera venusta (A. Gray) G. Mans. |
| Centunculus minimus | Anagallis minima (L.) E.H.L. Krause |
| Cephalanthus occidentalis var. californicus | Cephalanthus occidentalis L. |
| Cerastium arvense | misappl. to Cerastium arvense var. strictum |
| Cerastium beeringianum var. capillare | Cerastium beeringianum Cham. & Schltdl. |
| Cercidium microphyllum | Parkinsonia microphylla Torr. |
| Cercocarpus intricatus | Cercocarpus ledifolius var. intricatus (S. Watson) M.E. Jones |
| Cercidium floridum subsp. floridum | Parkinsonia florida (A. Gray) S. Watson |
| Cestrum fasciculatum | Cestrum elegans (Brongn.) Schltdl. |
| Chamaecytisus proliferus | Cytisus proliferus L. f. |
| Chamaemelum nobile | excluded |
| Chamomilla occidentalis | Matricaria occidentalis Greene |
| Chamomilla suaveolens | Matricaria discoidea DC. |
| Chenopodium ambrosioides | Dysphania ambrosioides (L.) Mosyakin & Clemants |
| Chenopodium botrys | Dysphania botrys (L.) Mosyakin & Clemants |
| Chenopodium carnosulum var. patagonicum | Chenopodium littoreum Benet-Pierce & M.G. Simpson |
| Chenopodium glaucum | misappl. to Chenopodium glaucum var. salinum |
| Chenopodium incognitum | Chenopodium hians Standl. |
| Chenopodium macrospermum var. halophilum | Chenopodium macrospermum Hook. f. |
| Chenopodium multifidum | Dysphania multifida (L.) Mosyakin & Clemants |
| Chenopodium pumilio | Dysphania pumilio (R. Br.) Mosyakin & Clemants |
| Chrysanthemum carinatum | excluded |
| Chrysanthemum coronarium | Glebionis coronaria (L.) Spach |
| Chrysanthemum segetum | Glebionis segetum (L.) Fourr. |
| Chrysothamnus albidus | Ericameria albida (A. Gray) L.C. Anderson |
| Chrysothamnus gramineus | Cuniculotinus gramineus (H.M. Hall) Urbatsch et al. |
| Chrysothamnus paniculatus | Ericameria paniculata (A. Gray) Rydb. |
| Chrysothamnus teretifolius | Ericameria teretifolia (Durand & Hilg.) Jeps. |
| Cichorium endiva | excluded |
| Ciclospermum leptophyllum | Cyclospermum leptophyllum (Pers.) Britton & P. Wilson |
| Cirsium canovirens | Cirsium cymosum var. canovirens (Rydb.) D.J. Keil; Cirsium inamoenum (Greene) D.J. Keil var. inamoenum |
| Cirsium loncholepis | Cirsium scariosum var. loncholepis (Petr.) D.J. Keil |
| Cirsium nidulum | Cirsium arizonicum var. tenuisectum D.J. Keil |
| Cirsium undulatum | Cirsium canescens Nutt.; Cirsium undulatum (Nutt.) Spreng. |
| Cistus creticus | Cistus incanus L. |
| Cistus salvifolius | Cistus salviifolius L. |
| Citrullus colocynthis var. lanatus | Citrullus lanatus (Thunb.) Matsum. & Nakai var. citroides (L.H. Bailey) Mansf. |
| Cleome lutea | Peritoma lutea (Hook.) Raf. |
| Cleome platycarpa | Peritoma platycarpa (Torr.) H.H. Iltis |
| Cleome serrulata | Peritoma serrulata (Pursh) DC. |
| Cleome sparsifolia | Carsonia sparsifolia (S. Watson) Greene |
| Cnicus benedictus | Centaurea benedicta (L.) L. |
| Cochlearia officinalis var. arctica | Cochlearia groenlandica L. |
| Collinsia parryi | Collinsia antonina Hardham; Collinsia parryi A. Gray |
| Collinsia sparsiflora var. arvensis | misappl. to Collinsia sparsiflora subsp. sparsiflora |
| Consolida ambigua | Consolida ajacis (L.) Schur |
| Conyza bilbaoana | Erigeron sumatrensis Retz. |
| Conyza bonariensis | Erigeron bonariensis L. |
| Conyza canadensis | Erigeron canadensis L. |
| Conyza coulteri | Laennecia coulteri (A. Gray) G.L. Nesom |
| Conyza floribunda | Erigeron sumatrensis Retz. |
| Cordylanthus maritimus | Chloropyron maritimum (Benth.) A. Heller |
| Cordylanthus mollis | Chloropyron molle (A. Gray) A. Heller |
| Cordylanthus orcuttianus | Dicranostegia orcuttiana (A. Gray) Pennell |
| Cordylanthus palmatus | Chloropyron palmatum (Ferris) Tank & J.M. Egger |
| Cordylanthus ramosus | Cordylanthus eremicus (Coville & C.V. Morton) Munz; Cordylanthus ramosus Benth. |
| Cordylanthus tecopensis | Chloropyron tecopense (Munz & J.C. Roos) Tank & J.M. Egger |
| Coreopsis bigelovii | Leptosyne bigelovii (A. Gray) A. Gray |
| Coreopsis californica var. californica | Leptosyne californica Nutt. |
| Coreopsis calliopsidea | Leptosyne calliopsidea (DC.) A. Gray |
| Coreopsis douglasii | Leptosyne douglasii DC. |
| Coreopsis gigantea | Leptosyne gigantea Kellogg |
| Coreopsis hamiltonii | Leptosyne hamiltonii Elmer |
| Coreopsis maritima | Leptosyne maritima (Nutt.) A. Gray |
| Coreopsis stillmanii | Leptosyne stillmanii A. Gray |
| Coreopsis wrightii | excluded |
| Corispermum hyssopifolium | Corispermum americanum (Nutt.) Nutt. var. americanum |
| Coronopus didymus | Lepidium didymum L. |
| Coronopus squamatus | Lepidium coronopus (L.) Al-Shehbaz |
| Corylus cornuta var. californica | Corylus cornuta Marshall subsp. californica (A. DC.) E. Murray |
| Cotoneaster pannosa | Cotoneaster pannosus Franch. |
| Crataegus suksdorfii | Crataegus gaylussacia A. Heller |
| Cryptantha sobolifera | excluded |
| Cupressus abramsiana | Hesperocyparis abramsiana (C.B. Wolf) Bartel |
| Cupressus bakeri | Hesperocyparis bakeri (Jeps.) Bartel |
| Cupressus forbesii | Hesperocyparis forbesii (Jeps.) Bartel |
| Cupressus goveniana | Hesperocyparis goveniana (Gordon) Bartel |
| Cupressus lawsoniana | Chamaecyparis lawsoniana (A. Murray bis) Parl. |
| Cupressus macnabiana | Hesperocyparis macnabiana (A. Murray bis) Bartel |
| Cupressus macrocarpa | Hesperocyparis macrocarpa (Hartw.) Bartel |
| Cupressus nootkatensis | Callitropsis nootkatensis (D. Don) D.P. Little |
| Cupressus sargentii | Hesperocyparis sargentii (Jeps.) Bartel |
| Cuscuta californica var. breviflora | Cuscuta occidentalis Millsp. |
| Cuscuta indecora var. neuropetala | Cuscuta indecora Choisy var. indecora |
| Cuscuta pentagona | excluded |
| Cuscuta salina | Cuscuta pacifica Costea & M. Wright; Cuscuta salina Engelm. |
| Cuscuta salina var. major | Cuscuta pacifica Costea & M. Wright var. pacifica |
| Cuscuta salina var. papillata | Cuscuta pacifica var. papillata (Yunck.) Costea & M. Wright |
| Cuscuta salina var. salina | Cuscuta salina Engelm. |
| Cuscuta subinclusa | Cuscuta pacifica Costea & M. Wright; Cuscuta subinclusa Durand & Hilg. |
| Cynanchum utahense | Funastrum utahense (Engelm.) Liede & Meve |
| Cynara scolymus | Cynara cardunculus L. subsp. cardunculus |
| Cynodon plectostachyus | excluded |
| Cynodon transvalensis | excluded |
| Cyperus ligularis | excluded |
| Danthonia californica var. americana | Danthonia californica Bol. |
| Danthonia californica var. californica | Danthonia californica Bol. |
| Danthonia pilosa | Rytidosperma penicillatum (Labill.) Connor & Edgar |
| Deschampsia atropurpurea | Vahlodea atropurpurea (Wahlenb.) Hartm. |
| Dicentra chrysantha | Ehrendorferia chrysantha (Hook. & Arn.) Rylander |
| Dicentra ochroleuca | Ehrendorferia ochroleuca (Engelm.) Fukuhara |
| Digitaria sanguinalis | Digitaria ciliaris (Retz.) Koeler; Digitaria sanguinalis (L.) Scop. |
| Disporum hookeri | Prosartes hookeri Torr. |
| Disporum smithii | Prosartes smithii (Hook.) Utech et al. |
| Ditaxis californica | Ditaxis serrata var. californica (Brandegee) V.W. Steinm. & Felger |
| Ditaxis clariana | Ditaxis claryana (Jeps.) Webster |
| Draba asterophora var. asterophora | Draba asterophora Payson |
| Draba asterophora var. macrocarpa | Draba asterophora Payson |
| Draba corrugata var. corrugata | Draba corrugata S. Watson |
| Draba corrugata var. saxosa | Draba saxosa Davidson |
| Draba lemmonii var. lemmonii | Draba longisquamosa O.E. Schulz |
| Draba lonchocarpa var. lonchocarpa | Draba lonchocarpa Rydb. |
| Draba oligosperma var. oligosperma | Draba oligosperma Hook. |
| Draba paysonii var. treleasei | Draba novolympica Payson & H. St. John |
| Dudleya calcicola | Dudleya abramsii subsp. calcicola (Bartel & Shevock) K.M. Nakai |
| Dudleya hassei | Dudleya virens subsp. hassei (Rose) Moran |
| Dudleya setchellii | Dudleya abramsii subsp. setchellii (Jeps.) Morin |
| Dugaldia hoopesii | Hymenoxys hoopesii (A. Gray) Bierner |
| Echinocereus triglochidiatus | Echinocereus mojavensis (Engelm. & J.M. Bigelow) Rümpler |
| Elaeagnus angustifolius | Elaeagnus angustifolia L. |
| Eleocharis acicularis var. bella | Eleocharis bella (Piper) Svenson |
| Eleocharis obtusa var. engelmannii | Eleocharis engelmannii Steud. |
| Eleocharis obtusa var. obtusa | Eleocharis obtusa (Willd.) Schult. |
| Eleocharis pauciflora | Eleocharis quinqueflora (Hartmann) O. Schwarz |
| Eleocharis thermalis | Eleocharis flavescens (Poir.) Urb. var. flavescens |
| Elymus arizonicus | excluded |
| Elymus canadensis | excluded |
| Elymus sierrus | Elymus sierrae Gould |
| Elytrigia elongata | Elymus ponticus (Podp.) N. Snow |
| Elytrigia repens | Elymus repens (L.) Gould |
| Ephedra fasciculata var. clokeyi | Ephedra aspera S. Watson |
| Ephedra fasciculata var. fasciculata | Ephedra aspera S. Watson |
| Epilobium halleanum | Epilobium hallianum Hausskn. |
| Epilobium latifolium | Chamerion latifolium (L.) Holub |
| Epilobium pygmaeum | Epilobium campestre (Jeps.) Hoch & W.L. Wagner |
| Eragrostis curvula var. curvula | Eragrostis curvula (Schrad.) Nees |
| Erechtites glomerata | Senecio glomeratus Poir. |
| Erechtites hieracifolia var. hieracifolia | excluded |
| Erechtites minima | Senecio minimus Poir. |
| Eremocarpus setigerus | Croton setigerus Hook. |
| Eriastrum brandegeae | Eriastrum brandegeeae H. Mason |
| Erigeron angustatus | Erigeron greenei G.L. Nesom |
| Erigeron austiniae | Erigeron chrysopsidis A. Gray var. austiniae (Greene) G.L. Nesom |
| Erigeron breweri var. klamathensis | Erigeron klamathensis (G.L. Nesom) G.L. Nesom |
| Erigeron concinnus var. condensatus | excluded |
| Erigeron decumbens var. robustior | Erigeron robustior (Cronquist) G.L. Nesom |
| Erigeron filifolius var. filifolius | Erigeron filifolius Nutt. |
| Erigeron lobatus | Erigeron divergens Torr. & A. Gray |
| Erigeron peregrinus | Erigeron glacialis (Nutt.) A. Nelson |
| Erigeron peregrinus var. callianthemus | Erigeron glacialis (Nutt.) A. Nelson var. glacialis |
| Erigeron peregrinus var. hirsutus | Erigeron glacialis var. hirsutus (Cronquist) G.L. Nesom |
| Eriogonum beatleyae | Eriogonum rosense A. Nelson & P.B. Kenn. var. rosense |
| Eriogonum cernuum var. cernuum | Eriogonum cernuum Nutt. |
| Eriogonum cernuum var. viminale | Eriogonum cernuum Nutt. |
| Eriogonum cespitosum | Eriogonum caespitosum Nutt. |
| Eriogonum deflexum var. rectum | Eriogonum deflexum var. deflexum |
| Eriogonum douglasii var. douglasii | Eriogonum douglasii Benth. var. meridionale Reveal |
| Eriogonum ericifolium var. thornei | Eriogonum thornei (Reveal & Henrickson) L.M. Shultz |
| Eriogonum foliosum | Eriogonum evanidum Reveal |
| Eriogonum inflatum var. deflatum | Eriogonum inflatum Torr. & Frém. |
| Eriogonum inflatum var. inflatum | Eriogonum inflatum Torr. & Frém. |
| Eriogonum ochrocephalum var. alexanderae | excluded |
| Eriogonum puberulum | Johanneshowellia puberula (S. Watson) Reveal |
| Eriogonum shockleyi var. shockleyi | Eriogonum shockleyi S. Watson |
| Eriogonum trichopes var. hooveri | Eriogonum clavatum Small |
| Eriogonum trichopes var. trichopes | Eriogonum trichopes Torr. |
| Erioneuron pulchellum | Dasyochloa pulchella (Kunth) Rydb. |
| Eriophorum criniger | Eriophorum crinigerum (A. Gray) Beetle |
| Eriophyllum lanatum var. achillaeoides | Eriophyllum lanatum var. achilleoides (DC.) Jeps. |
| Eriophyllum nevinii | Constancea nevinii (A. Gray) B.G. Baldwin |
| Erodium macrophyllum | California macrophylla (Hook. & Arn.) J.J. Aldasoro et al. |
| Eryngium alismaefolium | Eryngium alismifolium Greene |
| Erysimum capitatum subsp. capitatum | Erysimum capitatum (Hook.) Greene var. capitatum |
| Erysimum capitatum subsp. angustatum | Erysimum capitatum (Hook.) Greene var. capitatum |
| Erysimum capitatum subsp. lompocense | Erysimum capitatum (Hook.) Greene var. capitatum |
| Erysimum capitatum subsp. perenne | Erysimum perenne (Coville) Abrams |
| Erysimum insulare subsp. suffrutescens | Erysimum suffrutescens (Abrams) Rossbach |
| Erythronium multiscapoideum | Erythronium multiscapideum (Kellogg) A. Nelson & P.B. Kenn. |
| Eschscholzia parishii | Eschscholzia minutiflora S. Watson; Eschscholzia parishii Greene |
| Escobaria vivipara var. alversonii | Coryphantha alversonii (J.M. Coult.) Orcutt |
| Escobaria vivipara var. deserti | Coryphantha chlorantha (Engelm.) Britton & Rose |
| Escobaria vivipara var. rosea | Coryphantha vivipara (Nutt.) Britton & Rose var. rosea (Clokey) L.D. Benson |
| Eucalyptus pulverulenta | excluded |
| Euphorbia esula | Euphorbia virgata Waldst. & Kit. |
| Euphorbia incisa | Euphorbia schizoloba Engelm. |
| Euphorbia palmeri | Euphorbia lurida Engelm. |
| Euphorbia serrata | excluded |
| Fagopyrum esculentum | excluded |
| Ferocactus cylindraceus var. cylindraceus | Ferocactus cylindraceus (Engelm.) Orcutt |
| Ferocactus cylindraceus var. lecontei | Ferocactus cylindraceus (Engelm.) Orcutt |
| Festuca saximontana var. purpusiana | Festuca saximontana Rydb. |
| Filago arizonica | Logfia arizonica (A. Gray) Holub |
| Filago californica | Logfia filaginoides (Hook. & Arn.) Morefield |
| Filago depressa | Logfia depressa (A. Gray) Holub |
| Filago gallica | Logfia gallica (L.) Coss. & Germ. |
| Fimbristylis miliacea | excluded |
| Fritillaria affinis var. affinis | Fritillaria affinis (Schult. & Schult. f.) Sealy |
| Fritillaria affinis var. tristulis | Fritillaria affinis (Schult. & Schult. f.) Sealy |
| Fritillaria brandegei | Fritillaria brandegeei Eastw. |
| Galinsoga quadriradiata | excluded |
| Galium ambiguum var. ambiguum | Galium ambiguum W. Wight subsp. ambiguum |
| Galium ambiguum var. siskiyouense | Galium ambiguum subsp. siskiyouense (Ferris) Dempster & Stebbins |
| Galium mexicanum var. asperulum | Galium mexicanum Kunth subsp. asperulum (A. Gray) Dempster |
| Galium saxatile | excluded |
| Galium schultesii | excluded |
| Galium stellatum var. eremicum | Galium stellatum Kellogg |
| Galium trifidum var. pacificum | Galium trifidum subsp. columbianum (Rydb.) Hultén |
| Galium trifidum var. pusillum | Galium trifidum subsp. subbiflorum (Wiegand) Puff. |
| Galium verum | excluded |
| Galvezia speciosa | Gambelia speciosa Nutt. |
| Gastridium ventricosum | Gastridium phleoides (Nees & Meyen) C.E. Hubb. |
| Gaura coccinea | Oenothera suffrutescens (Ser.) W.L. Wagner & Hoch |
| Gaura drummondii | Oenothera xenogaura W.L. Wagner & Hoch |
| Gaura parviflora | Oenothera curtiflora W.L. Wagner & Hoch |
| Gaura sinuata | Oenothera sinuosa W.L. Wagner & Hoch |
| Genista stenopetala | excluded |
| Geranium anemonifolium | Geranium palmatum Cav. |
| Geranium retrorsum | misappl. to Geranium core-core |
| Gilia australis | Saltugilia australis (H. Mason & A.D. Grant) L.A. Johnson |
| Gilia campanulata | Linanthus campanulatus (A. Gray) J.M. Porter & L.A. Johnson |
| Gilia capillaris | Navarretia capillaris (Kellogg) Kuntze |
| Gilia caruifolia | Saltugilia caruifolia (Abrams) L.A. Johnson |
| Gilia filiformis | Linanthus filiformis (A. Gray) J.M. Porter & L.A. Johnson |
| Gilia hutchinsifolia | Aliciella hutchinsifolia (Rydb.) J.M. Porter |
| Gilia inyoensis | Linanthus inyoensis (I.M. Johnst.) J.M. Porter & L.A. Johnson |
| Gilia latifolia | Aliciella latifolia (S. Watson) J.M. Porter subsp. latifolia |
| Gilia leptalea | Navarretia leptalea (A. Gray) L.A. Johnson |
| Gilia leptomeria | Aliciella leptomeria (A. Gray) J.M. Porter |
| Gilia lottiae | Aliciella lottiae (A.G. Day) J.M. Porter |
| Gilia maculata | Linanthus maculatus (Parish) Milliken |
| Gilia micromeria | Aliciella micromeria (A. Gray) J.M. Porter |
| Gilia ripleyi | Aliciella ripleyi (Barneby) J.M. Porter |
| Gilia sinistra | Navarretia sinistra (M.E. Jones) L.A. Johnson |
| Gilia sinistra subsp. pinnatisecta | Navarretia sinistra subsp. pinnatisecta (H. Mason & A.D. Grant) L.A. Johnson |
| Gilia sinistra subsp. sinistra | Navarretia sinistra (M.E. Jones) L.A. Johnson subsp. sinistra |
| Gilia splendens | Saltugilia splendens (H. Mason & A.D. Grant) L.A. Johnson |
| Gilia splendens subsp. grantii | Saltugilia splendens subsp. grantii (Brand) L.A. Johnson |
| Gilia splendens subsp. splendens | Saltugilia splendens (H. Mason & A.D. Grant) L.A. Johnson subsp. splendens |
| Gilia subacaulis | Aliciella monoensis J.M. Porter |
| Gilia tenerrima | Lathrocasis tenerrima (A. Gray) L.A. Johnson |
| Gilia triodon | Aliciella triodon (Eastw.) Brand |
| Gladiolus italicus | excluded |
| Gladiolus tristis | excluded |
| Glyceria occidentalis | Glyceria ×occidentalis (Piper) J.C. Nelson |
| Gnaphalium bicolor | Pseudognaphalium biolettii Anderb. |
| Gnaphalium californicum | Pseudognaphalium californicum (DC.) Anderb. |
| Gnaphalium canescens | Pseudognaphalium canescens (DC.) Anderb. |
| Gnaphalium canescens subsp. beneolens | Pseudognaphalium beneolens (Davidson) Anderb. |
| Gnaphalium canescens subsp. canescens | Pseudognaphalium canescens (DC.) Anderb. |
| Gnaphalium canescens subsp. microcephalum | Pseudognaphalium microcephalum (Nutt.) Anderb. |
| Gnaphalium canescens subsp. thermale | Pseudognaphalium thermale (E.E. Nelson) G.L. Nesom |
| Gnaphalium collinum | Euchiton gymnocephalus (DC.) Holub |
| Gnaphalium japonicum | Euchiton sphaericus (Willd.) Holub |
| Gnaphalium leucocephalum | Pseudognaphalium leucocephalum (A. Gray) Anderb. |
| Gnaphalium luteo-album | Pseudognaphalium luteoalbum (L.) Hilliard & B.L. Burtt |
| Gnaphalium purpureum | Gamochaeta ustulata (Nutt.) Holub |
| Gnaphalium ramosissimum | Pseudognaphalium ramosissimum (Nutt.) Anderb. |
| Gnaphalium stramineum | Pseudognaphalium stramineum (Kunth) Anderb. |
| Grindelia camporum var. bracteosum | Grindelia camporum Greene |
| Grindelia camporum var. camporum | Grindelia camporum Greene |
| Grindelia fraxino-pratensis | Grindelia fraxinipratensis Reveal & Beatley |
| Grindelia hirsutula var. davyi | Grindelia camporum Greene |
| Grindelia hirsutula var. hallii | Grindelia hallii Steyerm. |
| Grindelia hirsutula var. hirsutula | Grindelia hirsutula Hook. & Arn. |
| Grindelia hirsutula var. maritima | Grindelia hirsutula Hook. & Arn. |
| Guillenia flavescens | Caulanthus flavescens (Hook.) Payson |
| Guillenia lasiophylla | Caulanthus lasiophyllus (Hook. & Arn.) Payson |
| Guillenia lemmonii | Caulanthus anceps Payson |
| Guizotia abyssinica | excluded |
| Gypsophila elegans var. elegans | Gypsophila elegans M. Bieb. |
| Gypsophila paniculata var. paniculata | Gypsophila paniculata L. |
| Halimolobos virgata | Transberingia bursifolia (DC.) Al-Shehbaz & O'Kane subsp. virgata (Nutt.) Al-Shehbaz & O'Kane |
| Halodule wrightii | excluded |
| Haloragis erecta | excluded |
| Hebe speciosa | excluded |
| Helenium autumnale var. grandiflorum | Helenium autumnale L. |
| Helenium autumnale var. montanum | Helenium autumnale L. |
| Helianthus maximilianii | excluded |
| Heliomeris hispida | excluded |
| Heliotropium curassavicum | misappl. to Heliotropium curassavicum var. occulatum |
| Hemizonia arida | Deinandra arida (D.D. Keck) B.G. Baldwin |
| Hemizonia clementina | Deinandra clementina (Brandegee) B.G. Baldwin |
| Hemizonia conjugens | Deinandra conjugens (D.D. Keck) B.G. Baldwin |
| Hemizonia corymbosa | Deinandra corymbosa (DC.) B.G. Baldwin |
| Hemizonia fasciculata | Deinandra fasciculata (DC.) Greene |
| Hemizonia fitchii | Centromadia fitchii (A. Gray) Greene |
| Hemizonia floribunda | Deinandra floribunda (A. Gray) Davidson & Moxley |
| Hemizonia halliana | Deinandra halliana (D.D. Keck) B.G. Baldwin |
| Hemizonia increscens | Deinandra increscens (D.D. Keck) B.G. Baldwin |
| Hemizonia kelloggii | Deinandra kelloggii (Greene) Greene |
| Hemizonia lobbii | Deinandra lobbii (Greene) Greene |
| Hemizonia minthornii | Deinandra minthornii (Jeps.) B.G. Baldwin |
| Hemizonia mohavensis | Deinandra mohavensis (D.D. Keck) B.G. Baldwin |
| Hemizonia pallida | Deinandra pallida (D.D. Keck) B.G. Baldwin |
| Hemizonia paniculata | Deinandra paniculata (A. Gray) Davidson & Moxley |
| Hemizonia parryi | Centromadia parryi (Greene) Greene |
| Hemizonia parryi subsp. australis | Centromadia parryi subsp. australis (D.D. Keck) B.G. Baldwin |
| Hemizonia parryi subsp. congdonii | Centromadia parryi subsp. congdonii (B.L. Rob. & Greenm.) B.G. Baldwin |
| Hemizonia parryi subsp. parryi | Centromadia parryi (Greene) Greene subsp. parryi |
| Hemizonia parryi subsp. rudis | Centromadia parryi subsp. rudis (Greene) B.G. Baldwin |
| Hemizonia pentactis | Deinandra pentactis (D.D. Keck) B.G. Baldwin |
| Hemizonia pungens | Centromadia pungens (Hook. & Arn.) Greene |
| Hemizonia pungens subsp. laevis | Centromadia pungens subsp. laevis (D.D. Keck) B.G. Baldwin |
| Hemizonia pungens subsp. maritima | Centromadia pungens (Hook. & Arn.) Greene subsp. pungens |
| Hemizonia pungens subsp. pungens | Centromadia pungens (Hook. & Arn.) Greene subsp. pungens |
| Hemizonia pungens subsp. septentrionalis | Centromadia pungens (Hook. & Arn.) Greene subsp. pungens |
| Heracleum lanatum | Heracleum maximum W. Bartram |
| Hesperolinon serpentinum | excluded |
| Hesperostipa comata | Stipa comata Trin. & Rupr. |
| Heteranthemis viscidehirta | Heteranthemis viscidihirta Schott |
| Heterodraba unilateralis | Athysanus unilateralis (M.E. Jones) Jeps. |
| Heterotheca psammophila | Heterotheca subaxillaris (Lam.) Britton & Rusby subsp. latifolia (Buckley) Semple |
| Heterotheca villosa var. hispida | Heterotheca villosa var. minor (Hook.) Semple |
| Heterotheca villosa var. shevockii | Heterotheca shevockii (Semple) Semple |
| Heterotheca villosa var. villosa | Heterotheca villosa var. minor (Hook.) Semple |
| Heuchera cespitosa | Heuchera caespitosa Eastw. |
| Heuchera cylindrica var. alpina | Heuchera cylindrica Douglas |
| Heuchera duranii | Heuchera parvifolia Torr. & A. Gray |
| Heuchera elegans | Heuchera caespitosa Eastw. |
| Heuchera rubescens var. alpicola | Heuchera rubescens Torr. |
| Heuchera rubescens var. glandulosa | Heuchera rubescens Torr. |
| Heuchera rubescens var. rydbergiana | Heuchera rubescens Torr. |
| Heuchera rubescens var. versicolor | Heuchera rubescens Torr. |
| Hibiscus lasiocarpus | Hibiscus lasiocarpos Cav. var. occidentalis (Torr.) A. Gray |
| Hieracium gracile | Hieracium triste Spreng. |
| Hierochloe occidentalis | Anthoxanthum occidentale (Buckley) Veldkamp |
| Hierochloe odorata | Anthoxanthum nitens (Weber) Y. Schouten & Veldkamp subsp. nitens |
| Holodiscus microphyllus | Holodiscus discolor var. microphyllus (Rydb.) Jeps. |
| Holodiscus microphyllus var. glabrescens | Holodiscus discolor var. glabrescens (Greenm.) Jeps. |
| Holodiscus microphyllus var. microphyllus | Holodiscus discolor var. microphyllus (Rydb.) Jeps. |
| Hutchinsia procumbens | Hornungia procumbens (L.) Hayek |
| Hydrocotyle moschata | excluded |
| Hydrocotyle sibthorpioides | excluded |
| Hymenoclea monogyra | Ambrosia monogyra (Torr. & A. Gray) Strother & B.G. Baldwin |
| Hymenoclea salsola | Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldwin |
| Hymenoclea salsola var. fasciculata | Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldwin var. salsola |
| Hymenoclea salsola var. pentalepis | Ambrosia salsola var. pentalepis (Rydb.) Strother & B.G. Baldwin |
| Hymenoclea salsola var. salsola | Ambrosia salsola (Torr. & A. Gray) Strother & B.G. Baldwin var. salsola |
| Hymenoxys acaulis var. arizonica | Tetraneuris acaulis (Pursh) Greene var. arizonica (Greene) K.F. Parker |
| Hypericum formosum var. scouleri | Hypericum scouleri Hook. |
| Ipomoea mutabilis | Ipomoea indica (Burm.) Merr. |
| Ipomoea nil | excluded |
| Ipomopsis depressa | Loeseliastrum depressum (A. Gray) J.M. Porter & L.A. Johnson |
| Isomeris arborea | Peritoma arborea (Nutt.) H.H. Iltis |
| Isopyrum occidentale | Enemion occidentale (Hook. & Arn.) J.R. Drumm. & Hutch. |
| Isopyrum stipitatum | Enemion stipitatum (A. Gray) J.R. Drumm. & Hutch. |
| Iva acerosa | Euphrosyne acerosa (Nutt.) Panero |
| Iva nevadensis | Euphrosyne nevadensis (M.E. Jones) Panero |
| Juglans californica var. californica | Juglans californica S. Watson |
| Juglans californica var. hindsii | Juglans hindsii R.E. Sm. |
| Juncus covillei var. covillei | Juncus covillei Piper |
| Juncus covillei var. obtusatus | Juncus covillei Piper |
| Juncus effusus var. brunneus | Juncus hesperius (Piper) Lint |
| Juncus effusus var. exiguus | Juncus exiguus (Fernald & Wiegand) Snogerup & Zika |
| Juncus effusus var. gracilis | Juncus laccatus Zika |
| Juncus effusus var. pacificus | Juncus effusus subsp. pacificus (Fernald & Wiegand) Piper & Beattie |
| Juncus falcatus var. falcatus | Juncus falcatus E. Mey. subsp. falcatus |
| Juncus lesueurii | Juncus lescurii Bol. |
| Juncus marginatus var. marginatus | Juncus marginatus Rostk. |
| Juncus phaeocephalus | Juncus nevadensis S. Watson; Juncus phaeocephalus Engelm. |
| Juniperus occidentalis var. australis | Juniperus grandis R.P. Adams |
| Juniperus occidentalis var. occidentalis | Juniperus occidentalis Hook. |
| Kobresia bellardii | Kobresia myosuroides (Vill.) Fiori & Paol. |
| Koeleria phleoides | Koeleria gerardii (Vill.) Shinners |
| Krameria grayi | Krameria bicolor S. Watson |
| Kumlienia hystricula | Ranunculus hystriculus A. Gray |
| Lasthenia macrantha | Lasthenia californica subsp. macrantha (A. Gray) R. Chan |
| Lathyrus aphaca | excluded |
| Lavatera arborea | Malva arborea (L.) Webb & Berthel. |
| Lavatera assurgentiflora | Malva assurgentiflora (Kellogg) M.F. Ray |
| Lavatera cretica | Malva pseudolavatera Webb & Berthel. |
| Ledum glandulosum | Rhododendron columbianum (Piper) Harmaja |
| Lembertia congdonii | Monolopia congdonii (A. Gray) B.G. Baldwin |
| Leontodon taraxacoides | Leontodon saxatilis Lam. |
| Lepidium densiflorum var. densiflorum | Lepidium densiflorum Schrad. |
| Lepidium densiflorum var. elongatum | Lepidium densiflorum Schrad. |
| Lepidium densiflorum var. macrocarpum | Lepidium densiflorum Schrad. |
| Lepidium densiflorum var. pubicarpum | Lepidium densiflorum Schrad. |
| Lepidium densiflorum var. ramosum | Lepidium densiflorum Schrad. |
| Lepidium dictyotum var. acutidens | Lepidium acutidens (A. Gray) Howell |
| Lepidium dictyotum var. dictyotum | Lepidium dictyotum A. Gray |
| Lepidium flavum var. felipense | Lepidium flavum Torr. |
| Lepidium flavum var. flavum | Lepidium flavum Torr. |
| Lepidium fremontii var. fremontii | Lepidium fremontii S. Watson |
| Lepidium fremontii var. stipitatum | Lepidium fremontii S. Watson |
| Lepidium lasiocarpum var. lasiocarpum | Lepidium lasiocarpum Nutt. subsp. lasiocarpum |
| Lepidium latipes var. heckardii | Lepidium latipes Hook. |
| Lepidium latipes var. latipes | Lepidium latipes Hook. |
| Lepidium montanum var. canescens | Lepidium montanum Nutt. |
| Lepidium montanum var. cinereum | Lepidium montanum Nutt. |
| Lepidium montanum var. montanum | Lepidium montanum Nutt. |
| Lepidium nitidum var. howellii | Lepidium nitidum Nutt. |
| Lepidium nitidum var. nitidum | Lepidium nitidum Nutt. |
| Lepidium nitidum var. oreganum | Lepidium nitidum Nutt. |
| Lepidium oblongum var. insulare | Lepidium oblongum Small |
| Lepidium oblongum var. oblongum | Lepidium oblongum Small |
| Lepidium ramosissimum var. bourgeauanum | Lepidium ramosissimum A. Nelson |
| Lepidium virginicum var. medium | Lepidium virginicum subsp. menziesii (DC.) Thell. |
| Lepidium virginicum var. pubescens | Lepidium virginicum subsp. menziesii (DC.) Thell. |
| Lepidium virginicum var. robinsonii | Lepidium virginicum subsp. menziesii (DC.) Thell. |
| Lepidium virginicum var. virginicum | Lepidium virginicum L. |
| Leptochloa fascicularis | Leptochloa fusca subsp. fascicularis (Lam.) N. Snow |
| Leptochloa filiformis | Leptochloa panicea (Retz.) Ohwi subsp. brachiata (Steud.) N. Snow |
| Leptochloa uninervia | Leptochloa fusca subsp. uninervia (J. Presl) N. Snow |
| Leptodactylon californicum | Linanthus californicus (Hook. & Arn.) J.M. Porter & L.A. Johnson |
| Leptodactylon jaegeri | Linanthus jaegeri (Munz) J.M. Porter & L.A. Johnson |
| Leptodactylon pungens | Linanthus pungens (Torr.) J.M. Porter & L.A. Johnson |
| Lesquerella kingii | Physaria kingii (S. Watson) O'Kane & Al-Shehbaz |
| Lesquerella tenella | Physaria tenella (A. Nelson) O'Kane & Al-Shehbaz |
| Lessingia filaginifolia var. californica | Corethrogyne filaginifolia (Hook. & Arn.) Nutt. |
| Lessingia filaginifolia var. filaginifolia | Corethrogyne filaginifolia (Hook. & Arn.) Nutt. |
| Lessingia glandulifera var. pectinata | Lessingia pectinata Greene var. pectinata |
| Lessingia lemmonii | Lessingia glandulifera A. Gray |
| Lessingia lemmonii var. lemmonii | Lessingia glandulifera A. Gray var. glandulifera |
| Lessingia lemmonii var. peirsonii | Lessingia glandulifera var. peirsonii (J.T. Howell) Markos |
| Lessingia lemmonii var. ramulosissima | Lessingia glandulifera A. Gray var. glandulifera |
| Lessingia occidentalis | Benitoa occidentalis (H.M. Hall) D.D. Keck |
| Lewisia columbiana | excluded |
| Lewisia leana | Lewisia leeana (Porter) B.L. Rob. |
| Leymus cinereus | Elymus cinereus Scribn. & Merr. |
| Leymus condensatus | Elymus condensatus J. Presl |
| Leymus pacificus | Elymus pacificus Gould |
| Leymus triticoides | Elymus triticoides Buckley |
| Lilaea scilloides | Triglochin scilloides (Poir.) Mering & Kadereit |
| Limnanthes striata | Limnanthes douglasii subsp. striata (Jeps.) Morin |
| Limonium arborescens | excluded |
| Limosella subulata | Limosella australis R. Br. |
| Linanthus acicularis | Leptosiphon acicularis (Greene) Jeps. |
| Linanthus ambiguus | Leptosiphon ambiguus (Rattan) J.M. Porter & L.A. Johnson |
| Linanthus androsaceus | Leptosiphon androsaceus Benth. |
| Linanthus aureus | Leptosiphon aureus (Nutt.) E. Vilm. |
| Linanthus aureus subsp. aureus | Leptosiphon aureus (Nutt.) E. Vilm. subsp. aureus |
| Linanthus aureus subsp. decorus | Leptosiphon aureus subsp. decorus (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus bicolor | Leptosiphon bicolor Nutt. |
| Linanthus bolanderi | Leptosiphon bolanderi (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus breviculus | Leptosiphon breviculus (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus ciliatus | Leptosiphon ciliatus (Benth.) Jeps. |
| Linanthus filipes | Leptosiphon filipes (Benth.) J.M. Porter & L.A. Johnson |
| Linanthus floribundus | Leptosiphon floribundus (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus grandiflorus | Leptosiphon grandiflorus Benth. |
| Linanthus harknessii | Leptosiphon harknessii (Curran) J.M. Porter & L.A. Johnson |
| Linanthus jepsonii | Leptosiphon jepsonii (Schemske & Goodwillie) J.M. Porter & L.A. Johnson |
| Linanthus lemmonii | Leptosiphon lemmonii (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus liniflorus | Leptosiphon liniflorus (Benth.) J.M. Porter & L.A. Johnson |
| Linanthus montanus | Leptosiphon montanus (Greene) J.M. Porter & L.A. Johnson |
| Linanthus nudatus | Leptosiphon nudatus (Greene) J.M. Porter & L.A. Johnson |
| Linanthus nuttallii | Leptosiphon nuttallii (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus oblanceolatus | Leptosiphon oblanceolatus (Brand) J.M. Porter & L.A. Johnson |
| Linanthus pachyphyllus | Leptosiphon pachyphyllus (R. Patt.) J.M. Porter & L.A. Johnson |
| Linanthus parviflorus | Leptosiphon parviflorus Benth. |
| Linanthus pygmaeus | Leptosiphon pygmaeus (Brand) J.M. Porter & L.A. Johnson |
| Linanthus rattanii | Leptosiphon rattanii (A. Gray) J.M. Porter & L.A. Johnson |
| Linanthus septentrionalis | Leptosiphon septentrionalis (H. Mason) J.M. Porter & L.A. Johnson |
| Linanthus serrulatus | Leptosiphon serrulatus (Greene) J.M. Porter & L.A. Johnson |
| Linaria canadensis | Nuttallanthus texanus (Scheele) D.A. Sutton |
| Linaria supina | excluded |
| Lindernia dubia var. anagallidea | Lindernia dubia (L.) Pennell |
| Lindernia dubia var. dubia | Lindernia dubia (L.) Pennell |
| Linum lewisii var. alpicola | Linum lewisii Pursh |
| Linum lewisii var. lewisii | Linum lewisii Pursh |
| Listera caurina | Listera banksiana Lindl. |
| Lithocarpus densiflorus | Notholithocarpus densiflorus (Hook. & Arn.) Manos et al. |
| Lithocarpus densiflorus var. densiflorus | Notholithocarpus densiflorus (Hook. & Arn.) Manos et al. var. densiflorus |
| Lithocarpus densiflorus var. echinoides | Notholithocarpus densiflorus var. echinoides (R. Br. ter) Manos et al. |
| Loeflingia squarrosa var. artemisiarum | Loeflingia squarrosa Nutt. |
| Loeflingia squarrosa var. squarrosa | Loeflingia squarrosa Nutt. |
| Lolium multiflorum | Festuca perennis (L.) Columbus & J.P. Sm. |
| Lolium perenne | Festuca perennis (L.) Columbus & J.P. Sm. |
| Lolium temulentum | Festuca temulenta (L.) Columbus & J.P. Sm. |
| Lomatium ciliolatum var. ciliolatum | Lomatium ciliolatum Jeps. |
| Lomatium ciliolatum var. hooveri | Lomatium hooveri (Mathias & Constance) Constance & Ertter |
| Lonicera hispidula var. vacillans | Lonicera hispidula (Lindl.) Torr. & A. Gray |
| Lotus aboriginus | Hosackia rosea Eastw. |
| Lotus argophyllus | Acmispon argophyllus (A. Gray) Brouillet |
| Lotus argophyllus var. adsurgens | Acmispon argophyllus var. adsurgens (Dunkle) Brouillet |
| Lotus argophyllus var. argenteus | Acmispon argophyllus var. argenteus (Dunkle) Brouillet |
| Lotus argophyllus var. argophyllus | Acmispon argophyllus (A. Gray) Brouillet var. argophyllus |
| Lotus argophyllus var. fremontii | Acmispon argophyllus var. fremontii (A. Gray) Brouillet |
| Lotus argophyllus var. niveus | Acmispon argophyllus var. niveus (Greene) Brouillet |
| Lotus argyraeus | Acmispon argyraeus (Greene) Brouillet |
| Lotus argyraeus var. argyraeus | Acmispon argyraeus (Greene) Brouillet var. argyraeus |
| Lotus argyraeus var. multicaulis | Acmispon argyraeus var. multicaulis (Ottley) Brouillet |
| Lotus argyraeus var. notitius | Acmispon argyraeus var. notitius (Isely) Brouillet |
| Lotus benthamii | Acmispon cytisoides (Benth.) Brouillet |
| Lotus crassifolius | Hosackia crassifolia Benth. |
| Lotus crassifolius var. crassifolius | Hosackia crassifolia Benth. var. crassifolia |
| Lotus crassifolius var. otayensis | Hosackia crassifolia var. otayensis (Isely) Brouillet |
| Lotus dendroideus | Acmispon dendroideus (Greene) Brouillet |
| Lotus dendroideus var. dendroideus | Acmispon dendroideus (Greene) Brouillet var. dendroideus |
| Lotus dendroideus var. traskiae | Acmispon dendroideus var. traskiae (Abrams) Brouillet |
| Lotus dendroideus var. veatchii | Acmispon dendroideus var. veatchii (Greene) Brouillet |
| Lotus denticulatus | Acmispon denticulatus (Drew) D.D. Sokoloff |
| Lotus formosissimus | Hosackia gracilis Benth. |
| Lotus grandiflorus | Acmispon grandiflorus (Benth.) Brouillet |
| Lotus grandiflorus var. grandiflorus | Acmispon grandiflorus (Benth.) Brouillet var. grandiflorus |
| Lotus grandiflorus var. macranthus | Acmispon grandiflorus var. macranthus (Greene) Brouillet |
| Lotus hamatus | Acmispon micranthus (Torr. & A. Gray) Brouillet |
| Lotus haydonii | Acmispon haydonii (Orcutt) Brouillet |
| Lotus heermannii | Acmispon heermannii (Durand & Hilg.) Brouillet |
| Lotus heermannii var. heermannii | Acmispon heermannii (Durand & Hilg.) Brouillet var. heermannii |
| Lotus heermannii var. orbicularis | Acmispon heermannii var. orbicularis (A. Gray) Brouillet |
| Lotus humistratus | Acmispon brachycarpus (Benth.) D.D. Sokoloff |
| Lotus incanus | Hosackia incana Torr. |
| Lotus junceus | Acmispon junceus (Benth.) Brouillet |
| Lotus junceus var. biolettii | Acmispon junceus var. biolettii (Greene) Brouillet |
| Lotus junceus var. junceus | Acmispon junceus (Benth.) Brouillet var. junceus |
| Lotus micranthus | Acmispon parviflorus (Benth.) D.D. Sokoloff |
| Lotus nevadensis | Acmispon nevadensis (S. Watson) Brouillet |
| Lotus nevadensis var. davidsonii | Acmispon nevadensis var. davidsonii (Greene) Brouillet |
| Lotus nevadensis var. nevadensis | Acmispon nevadensis (S. Watson) Brouillet var. nevadensis |
| Lotus nuttallianus | Acmispon prostratus (Torr. & A. Gray) Brouillet |
| Lotus oblongifolius | Hosackia oblongifolia Benth. |
| Lotus oblongifolius var. cupreus | Hosackia oblongifolia var. cuprea (Greene) Brouillet |
| Lotus oblongifolius var. oblongifolius | Hosackia oblongifolia Benth. var. oblongifolia |
| Lotus pinnatus | Hosackia pinnata (Hook.) Abrams |
| Lotus procumbens | Acmispon procumbens (Greene) Brouillet |
| Lotus procumbens var. jepsonii | Acmispon procumbens var. jepsonii (Ottley) Brouillet |
| Lotus procumbens var. procumbens | Acmispon procumbens (Greene) Brouillet var. procumbens |
| Lotus purshianus var. purshianus | Acmispon americanus (Nutt.) Rydb. var. americanus |
| Lotus rigidus | Acmispon rigidus (Benth.) Brouillet |
| Lotus rubriflorus | Acmispon rubriflorus (H. Sharsm.) D.D. Sokoloff |
| Lotus salsuginosus | Acmispon maritimus (Nutt.) D.D. Sokoloff |
| Lotus salsuginosus var. brevivexillus | Acmispon maritimus var. brevivexillus (Ottley) Brouillet |
| Lotus salsuginosus var. salsuginosus | Acmispon maritimus (Nutt.) D.D. Sokoloff var. maritimus |
| Lotus scoparius | Acmispon glaber (Vogel) Brouillet |
| Lotus scoparius var. brevialatus | Acmispon glaber var. brevialatus (Ottley) Brouillet |
| Lotus scoparius var. scoparius | Acmispon glaber (Vogel) Brouillet var. glaber |
| Lotus stipularis | Hosackia stipularis Benth. |
| Lotus stipularis var. ottleyi | Hosackia stipularis var. ottleyi (Isely) Brouillet |
| Lotus stipularis var. stipularis | Hosackia stipularis Benth. var. stipularis |
| Lotus strigosus | Acmispon strigosus (Nutt.) Brouillet |
| Lotus wrangelianus | Acmispon wrangelianus (Fisch. & C.A. Mey.) D.D. Sokoloff |
| Lotus yollabolliensis | Hosackia yollabolliensis (Munz) D.D. Sokoloff |
| Lupinus holmgrenanus | Lupinus holmgrenianus C.P. Sm. |
| Lupinus rivularis | Lupinus latifolius J. Agardh; Lupinus rivularis Lindl. |
| Lycurus phleoides var. phleoides | misappl. to Muhlenbergia alopecuroides |
| Lyrocarpa coulteri var. palmeri | Lyrocarpa coulteri Hook. & Harv. |
| Lysichiton americanum | Lysichiton americanus Hultén & H. St. John |
| Machaeranthera arida | Arida arizonica (R.C. Jacks. & R.R. Johnson) D.R. Morgan & R.L. Hartm. |
| Machaeranthera asteroides | Dieteria asteroides Torr. |
| Machaeranthera asteroides var. asteroides | Dieteria asteroides Torr. var. asteroides |
| Machaeranthera asteroides var. lagunensis | Dieteria asteroides var. lagunensis (D.D. Keck) D.R. Morgan & R.L. Hartm. |
| Machaeranthera canescens | Dieteria canescens (Pursh) Nutt. |
| Machaeranthera canescens var. canescens | Dieteria canescens (Pursh) Nutt. var. canescens |
| Machaeranthera canescens var. incana | Dieteria canescens var. incana (Lindl.) D.R. Morgan & R.L. Hartm. |
| Machaeranthera canescens var. leucanthemifolia | Dieteria canescens var. leucanthemifolia (Greene) D.R. Morgan & R.L. Hartm. |
| Machaeranthera canescens var. shastensis | Dieteria canescens var. shastensis (A. Gray) D.R. Morgan & R.L. Hartm. |
| Machaeranthera canescens var. ziegleri | Dieteria canescens var. ziegleri (Munz) D.R. Morgan & R.L. Hartm. |
| Machaeranthera carnosa | Arida carnosa (A. Gray) D.R. Morgan & R.L. Hartm. |
| Machaeranthera gracilis | Xanthisma gracile (Nutt.) D.R. Morgan & R.L. Hartm. |
| Machaeranthera juncea | Xanthisma junceum (Greene) D.R. Morgan & R.L. Hartm. |
| Machaeranthera pinnatifida var. gooddingii | Xanthisma spinulosum (Pursh) D.R. Morgan & R.L. Hartm. var. gooddingii (A. Nelson) D.R. Morgan & R.L. Hartm. |
| Madia bolanderi | Kyhosia bolanderi (A. Gray) B.G. Baldwin |
| Madia doris-nilesiae | Harmonia doris-nilesiae (T.W. Nelson & J.P. Nelson) B.G. Baldwin |
| Madia hallii | Harmonia hallii (D.D. Keck) B.G. Baldwin |
| Madia madioides | Anisocarpus madioides Nutt. |
| Madia minima | Hemizonella minima (A. Gray) A. Gray |
| Madia nutans | Harmonia nutans (Greene) B.G. Baldwin |
| Madia rammii | Jensia rammii (Greene) B.G. Baldwin |
| Madia stebbinsii | Harmonia stebbinsii (T.W. Nelson & J.P. Nelson) B.G. Baldwin |
| Madia yosemitana | Jensia yosemitana (A. Gray) B.G. Baldwin |
| Malcolmia africana | Strigosella africana (L.) Botsch. |
| Malus sylvestris | Malus pumila Mill. |
| Mammillaria milleri | Mammillaria grahamii Engelm. var. grahamii |
| Marah fabaceus | Marah fabacea (Naudin) Greene |
| Marah horridus | Marah horrida (Congdon) Dunn |
| Marah macrocarpus | Marah macrocarpa (Greene) Greene |
| Marah macrocarpus var. macrocarpus | Marah macrocarpa (Greene) Greene |
| Marah macrocarpus var. major | Marah macrocarpa (Greene) Greene |
| Marah oreganus | Marah oregana (S. Watson) Howell |
| Matricaria globifera | Oncosiphon piluliferum (L. f.) Källersjö |
| Maurandya petrophila | Holmgrenanthe petrophila (Coville & C.V. Morton) Elisens |
| Meconella linearis | Hesperomecon linearis (Benth.) Greene |
| Melilotus alba | Melilotus albus Medik. |
| Melilotus indica | Melilotus indicus (L.) All. |
| Menodora scoparia | Menodora scabra var. glabrescens A. Gray |
| Mentha spicata var. spicata | Mentha spicata L. |
| Mimulus jepsonii | Mimulus nanus var. jepsonii (A.L. Grant) D.M. Thomps. |
| Mimulus mephiticus | Mimulus nanus var. mephiticus (Greene) D.M. Thomps. |
| Mirabilis bigelovii | Mirabilis laevis var. villosa (Kellogg) Spellenb. |
| Mirabilis bigelovii var. bigelovii | Mirabilis laevis var. villosa (Kellogg) Spellenb. |
| Mirabilis bigelovii var. retrorsa | Mirabilis laevis var. retrorsa (A. Heller) Jeps. |
| Mirabilis californica | Mirabilis laevis var. crassifolia (Choisy) Spellenb. |
| Mirabilis oblongifolia | Mirabilis albida (Walter) Heimerl |
| Mirabilis pumila | Mirabilis albida (Walter) Heimerl |
| Miscanthus sinensis | excluded |
| Mitella breweri | Pectiantia breweri (A. Gray) Rydb. |
| Mitella caulescens | Mitellastra caulescens (Nutt.) Howell |
| Mitella diversifolia | Ozomelis diversifolia (Greene) Rydb. |
| Mitella ovalis | Pectiantia ovalis (Greene) Rydb. |
| Mitella pentandra | Pectiantia pentandra (Hook.) Rydb. |
| Mitella trifida | Ozomelis trifida (Graham) Rydb. |
| Monanthochloe littoralis | Distichlis littoralis (Engelm.) H.L. Bell & Columbus |
| Monardella antonina | Monardella villosa Benth. |
| Monardella cinerea | Monardella australis subsp. cinerea (Abrams) A.C. Sanders & Elvin |
| Monardella crispa | Monardella undulata subsp. crispa (Elmer) Elvin & A.C. Sanders |
| Monardella frutescens | Monardella undulata Benth. subsp. undulata |
| Monardella glauca | Monardella odoratissima subsp. glauca (Greene) Epling |
| Monardella lanceolata | Monardella breweri subsp. glandulifera (I.M. Johnst.) Elvin; Monardella breweri subsp. lanceolata (A. Gray) A.C. Sanders & Elvin |
| Monardella odoratissima | Monardella australis Abrams; Monardella odoratissima Benth. |
| Monardella siskiyouensis | Monardella villosa Benth. subsp. villosa |
| Monardella undulata | Monardella sinuata Elvin & A.C. Sanders; Monardella undulata Benth. |
| Monolepis pusilla | Micromonolepis pusilla (S. Watson) Ulbr. |
| Muehlenbeckia hastatula | Muehlenbeckia hastulata (Sm.) I.M. Johnst. |
| Muilla clevelandii | Bloomeria clevelandii S. Watson |
| Muscari botryoides | excluded (historical waif) |
| Myrica californica | Morella californica (Cham. & Schltdl.) Wilbur |
| Nama lobbii | Eriodictyon lobbii (A. Gray) Greene |
| Nassella cernua | Stipa cernua Stebbins & Love |
| Nassella formicara | Stipa manicata E. Desv. |
| Nassella lepida | Stipa lepida Hitchc. |
| Nassella pulchra | Stipa pulchra Hitchc. |
| Navarretia jaredii | Navarretia mitracarpa Greene |
| Nemacladus glanduliferus var. glanduliferus | Nemacladus glanduliferus Jeps. |
| Nemacladus glanduliferus var. orientalis | Nemacladus orientalis (McVaugh) Morin |
| Nemophila parviflora var. austinae | Nemophila parviflora var. austiniae (Eastw.) Brand |
| Nothoscordum inodorum | Nothoscordum gracile (Aiton) Stearn |
| Oenanthe pimpinelloides | excluded (misidentification) |
| Oenothera caespitosa | Oenothera cespitosa Nutt. |
| Opuntia acanthocarpa var. coloradensis | Cylindropuntia acanthocarpa (Engelm. & J.M. Bigelow) F.M. Knuth var. coloradensis (L.D. Benson) Pinkava |
| Opuntia bigelovii | Cylindropuntia bigelovii (Engelm.) F.M. Knuth |
| Opuntia echinocarpa | Cylindropuntia echinocarpa (Engelm. & J.M. Bigelow) F.M. Knuth |
| Opuntia erinacea var. erinacea | Opuntia polyacantha var. erinacea (Engelm. & J.M. Bigelow) B.D. Parfitt |
| Opuntia erinacea var. utahensis | Opuntia polyacantha var. erinacea (Engelm. & J.M. Bigelow) B.D. Parfitt |
| Opuntia ficus-indica | Opuntia ×occidentalis Engelm. & J.M. Bigelow; Opuntia ficus-indica (L.) Mill. |
| Opuntia parishii | Grusonia parishii (Orcutt) Pinkava |
| Opuntia parryi | Cylindropuntia californica var. parkeri (J.M. Coult.) Pinkava; Cylindropuntia californica (Torr. & A. Gray) F.M. Knuth |
| Opuntia phaeacantha | Opuntia engelmannii Engelm.; Opuntia phaeacantha Engelm. |
| Opuntia prolifera | Cylindropuntia prolifera (Engelm.) F.M. Knuth |
| Opuntia pulchella | Grusonia pulchella (Engelm.) H. Rob. |
| Opuntia ramosissima | Cylindropuntia ramosissima (Engelm.) F.M. Knuth |
| Opuntia wolfii | Cylindropuntia wolfii (L.D. Benson) M.A. Baker |
| Osmorhiza chilensis | Osmorhiza berteroi DC. |
| Osteospermum ecklonis | Dimorphotheca ecklonis DC. |
| Oxalis albicans | excluded |
| Oxalis albicans subsp. californica | Oxalis californica (Abrams) R. Knuth |
| Oxalis albicans subsp. pilosa | Oxalis pilosa Nutt. |
| Oxalis hirta | excluded |
| Oxalis latifolia | excluded |
| Oxalis laxa | Oxalis micrantha Colla |
| Oxalis rubra | Oxalis articulata Savigny subsp. rubra (A. St.-Hil.) Lourteig |
| Oxytheca caryophylloides | Sidotheca caryophylloides (Parry) Reveal |
| Oxytheca emarginata | Sidotheca emarginata (H.M. Hall) Reveal |
| Oxytheca parishii | Acanthoscyphus parishii (Parry) Small |
| Oxytheca parishii var. abramsii | Acanthoscyphus parishii var. abramsii (E.A. McGregor) Reveal |
| Oxytheca parishii var. cienegensis | Acanthoscyphus parishii var. cienegensis (Ertter) Reveal |
| Oxytheca parishii var. goodmaniana | Acanthoscyphus parishii var. goodmaniana (Ertter) Reveal |
| Oxytheca parishii var. parishii | Acanthoscyphus parishii var. goodmaniana (Ertter) Reveal |
| Oxytheca trilobata | Sidotheca trilobata (A. Gray) Reveal |
| Panicum acuminatum var. acuminatum | Panicum acuminatum Sw. |
| Panicum maximum | excluded (without mention) |
| Parishella californica | Nemacladus californicus (A. Gray) Morin |
| Parnassia californica | Parnassia palustris L. |
| Parvisedum congdonii | Sedella pumila (Benth.) Britton & Rose |
| Parvisedum leiocarpum | Sedella leiocarpa H. Sharsm. |
| Parvisedum pentandrum | Sedella pentandra H. Sharsm. |
| Parvisedum pumilum | Sedella pumila (Benth.) Britton & Rose |
| Pascopyrum smithii | Elymus smithii (Rydb.) Gould |
| Paspalum notatum | excluded |
| Pelargonium quercifolium | excluded |
| Penstemon davidsonii var. davidsonii | Penstemon davidsonii Greene |
| Penstemon humilis var. humilis | Penstemon humilis A. Gray |
| Penstemon palmeri var. palmeri | Penstemon palmeri A. Gray |
| Petrophyton caespitosum | Petrophytum caespitosum (Nutt.) Rydb. |
| Phacelia cicutaria var. hubbyi | Phacelia hubbyi (J.F. Macbr.) L.M. Garrison |
| Phacelia ixodes | excluded |
| Phacelia ramosissima var. austrolitoralis | Phacelia ramosissima Lehm. |
| Phacelia ramosissima var. eremophila | Phacelia ramosissima Lehm. |
| Phacelia ramosissima var. latifolia | Phacelia ramosissima Lehm. |
| Phacelia ramosissima var. montereyensis | Phacelia ramosissima Lehm. |
| Phacelia ramosissima var. ramosissima | Phacelia ramosissima Lehm. |
| Phacelia ramosissima var. subglabra | Phacelia ramosissima Lehm. |
| Phacelia suaveolens var. keckii | Phacelia keckii Munz & I.M. Johnst. |
| Phacelia suaveolens var. suaveolens | Phacelia suaveolens Greene |
| Phlox cespitosa | Phlox caespitosa Nutt. |
| Phlox gracilis | Microsteris gracilis (Hook.) Greene |
| Phoradendron densum | Phoradendron bolleanum (Seem.) Eichler |
| Phoradendron libocedri | Phoradendron juniperinum A. Gray |
| Phoradendron macrophyllum | Phoradendron serotinum subsp. macrophyllum (Engelm.) Kuijt |
| Phoradendron pauciflorum | Phoradendron bolleanum (Seem.) Eichler |
| Phoradendron villosum | Phoradendron serotinum subsp. tomentosum (DC.) Kuijt |
| Phyla nodiflora var. incisa | Phyla nodiflora (L.) Greene |
| Phyla nodiflora var. nodiflora | Phyla nodiflora (L.) Greene |
| Picris echioides | Helminthotheca echioides (L.) Holub |
| Pinus washoensis | Pinus ponderosa var. washoensis (H. Mason & Stockw.) J.R. Haller & Vivrette |
| Piptatherum micranthum | Stipa divaricata Columbus & J.P. Sm. |
| Piptatherum miliaceum | Stipa miliacea (L.) Hoover var. miliacea |
| Piptochaetium setosum | Stipa purpurata Columbus & J.P. Sm. |
| Plagiobothrys austinae | Plagiobothrys austiniae (Greene) I.M. Johnst. |
| Plagiobothrys fulvus | misappl. to Plagiobothrys fulvus var. campestris |
| Plagiobothrys myosotoides | Plagiobothrys verrucosus (Phil.) I.M. Johnst. |
| Plantago indica | Plantago arenaria Waldst. & Kit. |
| Platanthera hyperborea | Platanthera tescamnis Sheviak & W.F. Jenn. |
| Platanthera leucostachys | Platanthera dilatata (Pursh) L.C. Beck var. leucostachys (Lindl.) Luer |
| Plectritis brachystemon | Plectritis congesta subsp. brachystemon (Fisch. & C.A. Mey.) Morey |
| Pleuraphis jamesii | Hilaria jamesii (Torr.) Benth. |
| Pleuraphis rigida | Hilaria rigida (Thurb.) Scribn. |
| Poa pattersonii | Poa abbreviata subsp. pattersonii (Vasey) Á. Löve et al. |
| Poa rhizomata | Poa piperi Hitchc.; Poa rhizomata Hitchc. |
| Polyctenium fremontii var. confertum | Polyctenium fremontii (S. Watson) Greene |
| Polyctenium fremontii var. fremontii | Polyctenium fremontii (S. Watson) Greene |
| Polygonum amphibium | Persicaria amphibia (L.) Gray |
| Polygonum amphibium var. emersum | Persicaria amphibia (L.) Gray |
| Polygonum amphibium var. stipulaceum | Persicaria amphibia (L.) Gray |
| Polygonum arenastrum | Polygonum aviculare subsp. depressum (Meisn.) Arcang. |
| Polygonum baldschuanicum | Fallopia baldschuanica (Regel) Holub |
| Polygonum bistortoides | Bistorta bistortoides (Pursh) Small |
| Polygonum capitatum | Persicaria capitata (D. Don) H. Gross |
| Polygonum convolvulus | Fallopia convolvulus (L.) A. Löve |
| Polygonum cuspidatum | Fallopia japonica (Houtt.) Ronse Decr. |
| Polygonum davisiae | Aconogonon davisiae (A. Gray) Soják |
| Polygonum hydropiper | Persicaria hydropiper (L.) Delarbre |
| Polygonum hydropiperoides | Persicaria hydropiperoides (Michx.) Small |
| Polygonum lapathifolium | Persicaria lapathifolia (L.) Gray |
| Polygonum newberryi | Aconogonon newberryi (Small) Soják |
| Polygonum patulum | Polygonum ramosissimum Michx. |
| Polygonum pensylvanicum | Persicaria pensylvanica (L.) M. Gómez |
| Polygonum persicaria | Persicaria maculosa Gray |
| Polygonum phytolaccifolium | Aconogonon phytolaccifolium (Small) Rydb. |
| Polygonum polystachyum | Persicaria wallichii Greuter & Burdet |
| Polygonum prolificum | Polygonum ramosissimum subsp. prolificum (Small) Costea & Tardif |
| Polygonum punctatum | Persicaria punctata (Elliott) Small |
| Polygonum sachalinense | Fallopia sachalinensis (F. Schmidt) Ronse Decr. |
| Polypogon elongatus | Polypogon imberbis (Phil.) Johow |
| Potamogeton filiformis | misappl. to Stuckenia filiformis subsp. alpina |
| Potamogeton foliosus var. fibrillosus | Potamogeton foliosus subsp. fibrillosus (Fernald) R.R. Haynes & Hellq. |
| Potamogeton foliosus var. foliosus | Potamogeton foliosus Raf. subsp. foliosus |
| Potamogeton latifolius | Stuckenia striata (Ruiz & Pav.) Holub |
| Potamogeton pectinatus | Stuckenia pectinata (L.) Börner |
| Potamogeton pusillus var. pusillus | Potamogeton pusillus L. |
| Potamogeton pusillus var. tenuissimus | Potamogeton berchtoldii Fieber |
| Potentilla concinna | misappl. to Potentilla concinna var. proxima |
| Potentilla diversifolia var. diversifolia | misappl. to P. glaucophylla var. glaucophylla |
| Potentilla fruticosa | Dasiphora fruticosa (L.) Rydb. |
| Potentilla glandulosa | Drymocallis glandulosa (Lindl.) Rydb.; Drymocallis lactea (Greene) Rydb. |
| Potentilla palustris | Comarum palustre L. |
| Prionopsis ciliata | excluded (historical waif) |
| Pseudoroegneria spicata | Elymus spicatus (Pursh) Gould |
| Psilocarphus tenellus var. globiferus | Psilocarphus chilensis A. Gray |
| Psilocarphus tenellus var. tenellus | Psilocarphus tenellus Nutt. |
| Psoralidium lanceolatum | Ladeania lanceolata (Pursh) A.N. Egan & Reveal |
| Ptilagrostis kingii | Stipa kingii Bol. |
| Purshia mexicana var. stansburyana | Purshia stansburyana (Torr.) Henrickson |
| Quercus vaccinifolia | Quercus vacciniifolia Kellogg |
| Raillardiopsis muirii | Carlquistia muirii (A. Gray) B.G. Baldwin |
| Raillardiopsis scabrida | Anisocarpus scabridus (Eastw.) B.G. Baldwin |
| Ranunculus aquatilus | Ranunculus aquatilis L. |
| Ranunculus aquatilus var. capillaceus | Ranunculus aquatilis var. diffusus With. |
| Ranunculus aquatilus var. hispidulus | Ranunculus aquatilis L. var. aquatilis |
| Ranunculus aquatilus var. subrigidus | Ranunculus aquatilis var. diffusus With. |
| Ranunculus cymbalaria var. saximontanus | Ranunculus cymbalaria Pursh |
| Rhamnus californica | Frangula californica (Eschsch.) A. Gray |
| Rhamnus purshiana | Frangula purshiana (DC.) J.G. Cooper |
| Rhamnus rubra | Frangula rubra (Greene) Grubov |
| Rhamnus tomentella subsp. crassifolia | Frangula californica subsp. crassifolia (Jeps.) Kartesz & Gandhi |
| Rhamnus tomentella subsp. cuspidata | Frangula californica subsp. cuspidata (Greene) Kartesz & Gandhi |
| Rhamnus tomentella subsp. tomentella | Frangula californica subsp. tomentella (Benth.) Kartesz & Gandhi |
| Rhamnus tomentella subsp. ursina | Frangula californica subsp. ursina (Greene) Kartesz & Gandhi |
| Rhus trilobata | Rhus aromatica Aiton |
| Rhynchelytrum repens | Melinis repens (Willd.) Zizka subsp. repens |
| Rhynchospora globularis var. globularis | Rhynchospora globularis (Chapm.) Small |
| Rorippa curvipes var. curvipes | Rorippa curvipes Greene |
| Rorippa curvipes var. truncata | Rorippa curvipes Greene |
| Rorippa gambelii | Nasturtium gambelii (S. Watson) O.E. Schulz |
| Rorippa nasturtium-aquaticum | Nasturtium officinale W.T. Aiton |
| Rorippa palustris var. hispida | Rorippa palustris subsp. hispida (Desv.) Jonsell |
| Rorippa palustris var. occidentalis | Rorippa palustris (L.) Besser subsp. palustris |
| Rosa eglanteria | Rosa rubiginosa L. |
| Rosa nutkana var. nutkana | Rosa nutkana C. Presl subsp. nutkana |
| Rosa woodsii var. ultramontana | Rosa woodsii subsp. ultramontana (S. Watson) Roy L. Taylor & MacBryde |
| Rubus discolor | Rubus armeniacus Focke |
| Rubus ulmifolius var. inermis | Rubus ulmifolius var. anoplothyrsus Sudre |
| Rudbeckia californica var. californica | Rudbeckia californica A. Gray |
| Rudbeckia californica var. glauca | Rudbeckia glaucescens Eastw. |
| Rudbeckia californica var. intermedia | Rudbeckia klamathensis P.B. Cox & Urbatsch |
| Rudbeckia occidentalis var. occidentalis | Rudbeckia occidentalis Nutt. |
| Rumex maritimus | Rumex fueginus Phil. |
| Rumex orbiculatus | Rumex britannica L. |
| Rumex salicifolius var. crassus | Rumex crassus Rech. f. |
| Rumex salicifolius var. denticulatus | Rumex californicus Rech. f. |
| Rumex salicifolius var. lacustris | Rumex lacustris Greene |
| Rumex salicifolius var. salicifolius | Rumex salicifolius Weinm. |
| Rumex salicifolius var. transitorius | Rumex transitorius Rech. f. |
| Rumex salicifolius var. triangulivalvis | Rumex triangulivalvis (Danser) Rech. f. |
| Salazaria mexicana | Scutellaria mexicana (Torr.) A.J. Paton |
| Salicornia europaea | Salicornia depressa Standl. |
| Salicornia subterminalis | Arthrocnemum subterminale (Parish) Standl. |
| Salicornia utahensis | excluded (misappl. to S. pacifica) |
| Salicornia virginica | Salicornia pacifica Standl. |
| Salix arctica | Salix petrophila Rydb. |
| Salix sessilifolia | excluded (misappl. to S. melanopsis) |
| Salsola paulsenii | Salsola gobicola Iljin; Salsola paulsenii Litv. |
| Salsola tragus | Salsola australis R. Br.; Salsola tragus |
| Salvia brandegei | Salvia brandegeei Munz |
| Salvia verbenacea | excluded |
| Sambucus melanocarpa | Sambucus racemosa var. melanocarpa (A. Gray) McMinn |
| Sambucus mexicana | Sambucus nigra L. subsp. caerulea (Raf.) Bolli |
| Sambucus racemosa var. microbotrys | Sambucus racemosa L. var. racemosa |
| Sanguisorba occidentalis | Poteridium annuum (Nutt.) Spach |
| Santolina chamaecyparisus | excluded |
| Sarcostemma cynanchoides subsp. hartwegii | Funastrum cynanchoides (Decne.) Schltr. var. hartwegii (Vail) Krings |
| Sarcostemma hirtellum | Funastrum hirtellum (A. Gray) Schltr. |
| Satureja chandleri | Clinopodium chandleri (Brandegee) P.D. Cantino & Wagstaff |
| Satureja douglasii | Clinopodium douglasii (Benth.) Kuntze |
| Satureja mimuloides | Clinopodium mimuloides (Benth.) Kuntze |
| Saxifraga aprica | Micranthes aprica (Greene) Small |
| Saxifraga bryophora | Micranthes bryophora (A. Gray) Brouillet & Gornall |
| Saxifraga californica | Micranthes californica (Greene) Small |
| Saxifraga ferruginea | Micranthes ferruginea (Graham) Brouillet & Gornall |
| Saxifraga howellii | Micranthes howellii (Greene) Small |
| Saxifraga integrifolia | Micranthes integrifolia (Hook.) Small |
| Saxifraga marshallii | Micranthes marshallii (Greene) Small |
| Saxifraga nidifica var. nidifica | Micranthes nidifica (Greene) Small |
| Saxifraga nuttallii | Cascadia nuttallii (Small) A.M. Johnson |
| Saxifraga odontoloma | Micranthes odontoloma (Piper) A. Heller |
| Saxifraga oregana | Micranthes oregana (Howell) Small |
| Saxifraga rivularis | Saxifraga hyperborea R. Br. |
| Saxifraga rufidula | Micranthes marshallii |
| Saxifraga stolonifera | excluded |
| Saxifraga tolmiei | Micranthes tolmiei (Torr. & A. Gray) Brouillet & Gornall |
| Schizachyrium scoparium | excluded |
| Schkuhria multiflora var. multiflora | Bahia neomexicana (A. Gray) A. Gray |
| Scirpus acutus var. occidentalis | Schoenoplectus acutus (Bigelow) Á. Löve & D. Löve var. occidentalis (S. Watson) S.G. Sm. |
| Scirpus americanus | Schoenoplectus americanus (Pers.) Schinz & R. Keller |
| Scirpus californicus | Schoenoplectus californicus (C.A. Mey.) Soják |
| Scirpus cernuus | Isolepis cernua (Vahl) Roem. & Schult. |
| Scirpus clementis | Trichophorum clementis (M.E. Jones) S.G. Sm. |
| Scirpus fluviatilis | Bolboschoenus fluviatilis (Torr.) Soják |
| Scirpus heterochaetus | Schoenoplectus heterochaetus (Chase) Soják |
| Scirpus koilolepis | Isolepis carinata Torr. |
| Scirpus maritimus | Bolboschoenus maritimus (L.) Palla subsp. paludosus (A. Nelson) T. Koyama |
| Scirpus mucronatus | Schoenoplectus mucronatus (L.) Palla |
| Scirpus nevadensis | Amphiscirpus nevadensis (S. Watson) Oteng-Yeb. |
| Scirpus pumilus | Trichophorum pumilum (Vahl) Schinz & Thell. |
| Scirpus pungens | Schoenoplectus pungens (Vahl) Palla var. longispicatus (Britton) S.G. Sm. |
| Scirpus robustus | Bolboschoenus robustus (Pursh) Soják |
| Scirpus saximontanus | Schoenoplectus saximontanus (Fernald) J. Raynal |
| Scirpus setaceus | Isolepis setacea (L.) R. Br. |
| Scirpus subterminalis | Schoenoplectus subterminalis (Torr.) Soják |
| Scirpus tabernaemontani | Schoenoplectus tabernaemontani (C.C. Gmel.) Palla |
| Scirpus tuberosus | Bolboschoenus glaucus (Lam.) S.G. Sm. |
| Scrophularia californica subsp. californica | Scrophularia californica Cham. & Schltdl. |
| Scrophularia californica subsp. floribunda | Scrophularia californica Cham. & Schltdl. |
| Sedum eastwoodiae | Sedum laxum subsp. eastwoodiae (Britton) R.T. Clausen |
| Sedum paradisum | Sedum obtusatum subsp. paradisum Denton |
| Selaginella densa var. scopulorum | Selaginella scopulorum Maxon |
| Selinocarpus nevadensis | Acleisanthes nevadensis (Standl.) B.L. Turner |
| Senecio bernardinus | Packera bernardina (Greene) W.A. Weber & Á. Löve |
| Senecio bolanderi var. bolanderi | Packera bolanderi (A. Gray) W.A. Weber & Á. Löve var. bolanderi |
| Senecio breweri | Packera breweri (Burtt Davy) W.A. Weber & Á. Löve |
| Senecio canus | Packera cana (Hook.) W.A. Weber & Á. Löve |
| Senecio clevelandii | Packera clevelandii (Greene) W.A. Weber & Á. Löve |
| Senecio cymbalarioides | Packera subnuda (DC.) Trock & T.M. Barkley var. subnuda |
| Senecio eurycephalus | Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve |
| Senecio eurycephalus var. eurycephalus | Packera eurycephala (Torr. & A. Gray) W.A. Weber & Á. Löve var. eurycephala |
| Senecio eurycephalus var. lewisrosei | Packera eurycephala var. lewisrosei (J.T. Howell) J.F. Bain |
| Senecio ganderi | Packera ganderi (T.M. Barkley & R.M. Beauch.) W.A. Weber & Á. Löve |
| Senecio greenei | Packera greenei (A. Gray) W.A. Weber & Á. Löve |
| Senecio hybridus | excluded |
| Senecio indecorus | Packera indecora (Greene) Á. Löve & D. Löve |
| Senecio ionophyllus | Packera ionophylla (Greene) W.A. Weber & Á. Löve |
| Senecio layneae | Packera layneae (Greene) W.A. Weber & Á. Löve |
| Senecio macounii | Packera macounii (Greene) W.A. Weber & Á. Löve |
| Senecio mikanioides | Delairea odorata Lem. |
| Senecio multilobatus | Packera multilobata (Torr. & A. Gray) W.A. Weber & Á. Löve |
| Senecio pauciflorus | Packera pauciflora (Pursh) Á. Löve & D. Löve |
| Senecio pseudaureus var. pseudaureus | Packera pseudaurea (Rydb.) W.A. Weber & Á. Löve var. pseudaurea |
| Senecio streptanthifolius | Packera streptanthifolia (Greene) W.A. Weber & Á. Löve var. streptanthifolia |
| Senecio werneriifolius | Packera werneriifolia (A. Gray) W.A. Weber & Á. Löve |
| Sesbania exaltata | Sesbania herbacea (Mill.) McVaugh |
| Setaria gracilis | Setaria parviflora (Poir.) Kerguélen |
| Sibara rosulata | Sibara deserti (M.E. Jones) Rollins |
| Sibara virginica | Planodes virginicum (L.) Greene |
| Silene californica | Silene laciniata subsp. californica (Durand) J.K. Morton |
| Silene multinervia | Silene coniflora Otth |
| Silene verecunda subsp. platyota | Silene verecunda S. Watson |
| Sisyrinchium douglasii var. douglasii | Olsynium douglasii (A. Dietr.) E.P. Bicknell var. douglasii |
| Smelowskia ovalis var. congesta | Smelowskia ovalis M.E. Jones |
| Smilacina racemosa | Maianthemum racemosum (L.) Link |
| Smilacina stellata | Maianthemum stellatum (L.) Link |
| Solanum mauritianum | Solanum aviculare G. Forst. |
| Solanum sarrachoides | Solanum physalifolium Rusby var. nitidibaccatum (Bitter) Edmonds |
| Solidago altissima var. altissima | Solidago altissima L. subsp. altissima |
| Solidago californica | Solidago velutina subsp. californica (Nutt.) Semple |
| Solidago gigantea | Solidago lepida DC. var. salebrosa (Piper) Semple |
| Solidago sparsiflora | Solidago velutina subsp. sparsiflora (A. Gray) Semple |
| Sollya heterophylla | Billardiera heterophylla (Lindl.) L.W. Cayzer & Crisp |
| Sorbus scopulina var. cascadensis | Sorbus scopulina Greene |
| Sorbus scopulina var. scopulina | Sorbus scopulina Greene |
| Spergularia bocconei | Spergularia bocconi (Scheele) Graebn. |
| Spiraea densiflora | Spiraea splendens K. Koch |
| Spirodela polyrrhiza | Spirodela polyrhiza (L.) Schleid. |
| Spirodela punctata | Landoltia punctata (G. Mey.) Les & D.J. Crawford |
| Stachys ajugoides var. ajugoides | Stachys ajugoides Benth. |
| Stachys ajugoides var. rigida | Stachys bergii G.A. Mulligan & D.B. Munro; Stachys rigida Benth. var. quercetorum (A. Heller) G.A. Mulligan & D.B. Munro |
| Stachys arvensis | excluded |
| Stanleya pinnata var. inyoensis | Stanleya pinnata (Pursh) Britton var. pinnata |
| Stellaria longipes var. longipes | Stellaria longipes Goldie subsp. longipes |
| Stenotus stenophyllus | Nestotus stenophyllus (A. Gray) R.P. Roberts et al. |
| Stephanomeria blairii | Munzothamnus blairii (Munz & I.M. Johnst.) P.H. Raven |
| Stephanomeria pauciflora var. parishii | Stephanomeria pauciflora (Torr.) A. Nelson |
| Stephanomeria pauciflora var. pauciflora | Stephanomeria pauciflora (Torr.) A. Nelson |
| Stephanomeria spinosa | Pleiacanthus spinosus (Nutt.) Rydb. |
| Streptanthus albidus | Streptanthus glandulosus Hook. |
| Streptanthus breweri var. breweri | Streptanthus breweri A. Gray |
| Streptanthus breweri var. hesperidis | Streptanthus hesperidis Jeps. |
| Streptanthus cordatus var. duranii | Streptanthus cordatus Nutt. var. cordatus |
| Streptanthus niger | Streptanthus glandulosus subsp. niger (Greene) Al-Shehbaz et al. |
| Streptanthus tortuosus var. flavescens | Streptanthus tortuosus Kellogg |
| Streptanthus tortuosus var. orbiculatus | Streptanthus tortuosus Kellogg |
| Streptanthus tortuosus var. suffrutescens | Streptanthus tortuosus Kellogg |
| Streptanthus tortuosus var. tortuosus | Streptanthus tortuosus Kellogg |
| Stylomecon heterophylla | Papaver heterophyllum (Benth.) Greene |
| Styrax officinalis var. redivivus | Styrax redivivus (Torr.) L.C. Wheeler |
| Suaeda moquinii | Suaeda nigra (Raf.) J.F. Macbr. |
| Subularia aquatica var. americana | Subularia aquatica L. subsp. americana G.A. Mulligan & Calder |
| Suksdorfia ranunculifolia | Hemieva ranunculifolia (Hook.) Raf. |
| Swertia albicaulis | Frasera albicaulis Griseb. |
| Swertia albicaulis var. albicaulis | Frasera albicaulis var. modocensis (H. St. John) N.H. Holmgren |
| Swertia albicaulis var. nitida | Frasera albicaulis var. nitida (Benth.) C.L. Hitchc. |
| Swertia albomarginata | Frasera albomarginata S. Watson |
| Swertia fastigiata | Frasera umpquaensis M. Peck & Applegate |
| Swertia neglecta | Frasera neglecta H.M. Hall |
| Swertia parryi | Frasera parryi Torr. |
| Swertia puberulenta | Frasera puberulenta Davidson |
| Swertia radiata | Frasera speciosa Griseb. |
| Swertia tubulosa | Frasera tubulosa Coville |
| Symphytum asperum | Symphytum ×uplandicum Nyman |
| Taeniatherum caput-medusae | Elymus caput-medusae L. |
| Tanacetum camphoratum | Tanacetum bipinnatum (L.) Sch. Bip. |
| Thermopsis macrophylla var. argentata | Thermopsis californica var. argentata (Greene) C.J. Chen & B.L. Turner |
| Thermopsis macrophylla var. macrophylla | Thermopsis macrophylla Hook. & Arn. |
| Thermopsis macrophylla var. semota | Thermopsis californica var. semota (Jeps.) C.J. Chen & B.L. Turner |
| Thermopsis macrophylla var. venosa | Thermopsis gracilis Howell |
| Thlaspi californicum | Noccaea fendleri subsp. californica (S. Watson) Al-Shehbaz & M. Koch |
| Thlaspi montanum var. montanum | Noccaea fendleri subsp. glauca (A. Nelson) Al-Shehbaz & M. Koch |
| Tidestromia oblongifolia | Tidestromia suffruticosa (Torr.) Standl. var. oblongifolia (S. Watson) Sánch.Pino & Flores Olv. |
| Tolmiea menziesii | excluded |
| Townsendia parryi | excluded |
| Trautvetteria caroliniensis var. occidentalis | Trautvetteria caroliniensis (Walter) Vail |
| Trientalis arctica | Trientalis europaea L. |
| Trifolium albopurpureum var. albopurpureum | Trifolium albopurpureum Torr. & A. Gray |
| Trifolium albopurpureum var. dichotomum | Trifolium dichotomum Hook. & Arn. |
| Trifolium albopurpureum var. olivaceum | Trifolium olivaceum Greene |
| Trifolium andersonii var. andersonii | Trifolium andersonii A. Gray subsp. andersonii |
| Trifolium andersonii var. beatleyae | Trifolium andersonii subsp. beatleyae J.M. Gillett |
| Trifolium barbigerum var. andrewsii | Trifolium grayi Lojac. |
| Trifolium barbigerum var. barbigerum | Trifolium barbigerum Torr. |
| Trifolium depauperatum var. hydrophilum | Trifolium hydrophilum Greene |
| Trifolium eriocephalum var. eriocephalum | Trifolium eriocephalum Nutt. subsp. eriocephalum |
| Trifolium gracilentum var. gracilentum | Trifolium gracilentum Torr. & A. Gray |
| Trifolium gracilentum var. palmeri | Trifolium palmeri S. Watson |
| Trifolium gymnocarpon var. plummerae | Trifolium gymnocarpon Nutt. subsp. plummerae (S. Watson) J.M. Gillett |
| Trifolium kingii var. productum | Trifolium productum Greene |
| Trifolium longipes var. elmeri | Trifolium longipes subsp. elmeri (Greene) J.M. Gillett |
| Trifolium longipes var. nevadense | Trifolium longipes subsp. hansenii (Greene) J.M. Gillett |
| Trifolium longipes var. oreganum | Trifolium longipes subsp. oreganum (Howell) J.M. Gillett |
| Trifolium longipes var. shastense | Trifolium longipes subsp. shastense (House) J.M. Gillett |
| Trifolium macilentum var. dedeckerae | Trifolium kingii S. Watson subsp. dedeckerae (J.M. Gillett) D. Heller |
| Trifolium monanthum var. grantianum | Trifolium monanthum subsp. grantianum (A. Heller) J.M. Gillett |
| Trifolium monanthum var. monanthum | Trifolium monanthum A. Gray subsp. monanthum |
| Trifolium variegatum | Trifolium polyodon Greene; Trifolium variegatum Nutt.; Trifolium variegatum Nutt. var. variegatum; Trifolium variegatum var. geminiflorum (Greene) Vincent; Trifolium variegatum var. major Lojac. |
| Trillium rivale | Pseudotrillium rivale (S. Watson) S.B. Farmer |
| Trimorpha acris var. debilis | Erigeron nivalis Nutt. |
| Trimorpha lonchophylla | Erigeron lonchophyllus Hook. |
| Trisetum flavescens | excluded (extirpated) |
| Triteleia crocea var. crocea | Triteleia crocea (Alph. Wood) Greene |
| Triteleia crocea var. modesta | Triteleia crocea (Alph. Wood) Greene |
| Turricula parryi | Eriodictyon parryi (A. Gray) Greene |
| Ulex europaea | Ulex europaeus L. |
| Utricularia vulgaris | excluded |
| Vaccinium caespitosum | Vaccinium cespitosum Michx. |
| Venidium fastuosum | excluded |
| Verbena tenuisecta | Verbena pulchella Sweet |
| Veronica beccabunga | excluded |
| Veronica chamaedrys | excluded |
| Veronica filiformis | excluded |
| Veronica hederifolia | excluded |
| Vicia americana var. americana | Vicia americana Willd. subsp. americana |
| Vicia ludoviciana var. ludoviciana | Vicia ludoviciana Torr. & A. Gray subsp. ludoviciana |
| Viguiera laciniata | Bahiopsis laciniata (A. Gray) E.E. Schill. & Panero |
| Viguiera parishii | Bahiopsis parishii (Greene) E.E. Schill. & Panero |
| Viguiera reticulata | Bahiopsis reticulata (S. Watson) E.E. Schill. & Panero |
| Viola aurea | Viola purpurea subsp. aurea (Kellogg) J.C. Clausen |
| Viola tricolor | excluded |
| Vulpia bromoides | Festuca bromoides L. |
| Vulpia microstachys var. ciliata | Festuca microstachys Nutt. |
| Vulpia microstachys var. confusa | Festuca microstachys Nutt. |
| Vulpia microstachys var. microstachys | Festuca microstachys Nutt. |
| Vulpia microstachys var. pauciflora | Festuca microstachys Nutt. |
| Vulpia myuros var. hirsuta | Festuca myuros L. |
| Vulpia myuros var. myuros | Festuca myuros L. |
| Vulpia octoflora | Festuca octoflora Walter |
| Vulpia octoflora var. hirtella | Festuca octoflora Walter |
| Vulpia octoflora var. octoflora | Festuca octoflora Walter |
| Whitneya dealbata | Arnica dealbata (A. Gray) B.G. Baldwin |
| Yucca whipplei | Hesperoyucca whipplei (Torr.) Trel. |
| Zigadenus brevibracteatus | Toxicoscordion brevibracteatum (M.E. Jones) R.R. Gates |
| Zigadenus exaltatus | Toxicoscordion exaltatum (Eastw.) A. Heller |
| Zigadenus fremontii | Toxicoscordion fremontii (Torr.) Rydb. |
| Zigadenus micranthus var. fontanus | Toxicoscordion fontanum (Eastw.) Zomlefer & Judd |
| Zigadenus micranthus var. micranthus | Toxicoscordion micranthum (Eastw.) A. Heller |
| Zigadenus paniculatus | Toxicoscordion paniculatum (Nutt.) Rydb. |
| Zigadenus venenosus var. venenosus | Toxicoscordion venenosum (S. Watson) Rydb. var. venenosum |
