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Key to families Table of families and genera
  Index to accepted names and synonyms:
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Scientific Name

Index Page: I

Scientific NameCommon Name
Iberis
Iberis sempervirens
(Under Brassicaceae (Cruciferae))
Mentioned in
a note
Iberis sempervirens
(Under Iberis)
Mentioned in
a note
Iberis umbellataGLOBE CANDYTUFTWaif
Ibicella lutea
(Under Proboscidea lutea)
Synonym
Idahoa
Idahoa scapigeraNative
IlexHOLLY
Ilex aquifoliumENGLISH HOLLYNaturalized
Ilex cornuta
(Under Ilex)
Mentioned in
a note
Iliamna
  ↳  Key to Iliamna
GLOBE MALLOW
Iliamna bakeriBAKER'S GLOBE MALLOWNative
Iliamna latibracteataCALIFORNIA GLOBE MALLOWNative
Iliamna rivularisSTREAMBANK WILD HOLLYHOCKNative
Impatiens
  ↳  Key to Impatiens
TOUCH-ME-NOT, JEWELWEED
Impatiens balfouriiKASHMIR BALSAMNaturalized
Impatiens capensisSPOTTED JEWELWEEDWaif
Impatiens ecalcarata
(Under Impatiens capensis)
Mentioned in
a note
Impatiens glanduliferaPOLICEMAN'S HELMETNaturalized
Impatiens noli-tangere
(Under Impatiens capensis)
Synonym
Imperata
Imperata brevifoliaCALIFORNIA SATINTAILNative
Inula helenium
(Under Asteraceae (Compositae))
Mentioned in
a note
IonactisASTER
Ionactis alpinaLAVA-ASTER, CRAG-ASTERNative
IpheionSTAR FLOWER
Ipheion uniflorumNaturalized
Ipomoea
  ↳  Key to Ipomoea
MORNING-GLORY
Ipomoea acuminata
(Under Ipomoea indica)
Synonym
Ipomoea batatas
(Under Ipomoea)
Mentioned in
a note
Ipomoea cairicaWaif
Ipomoea hederaceaIVY MORNING-GLORYWaif
Ipomoea indicaUrban weed
Ipomoea lacunosa
(Under Ipomoea)
Mentioned in
a note
Ipomoea mutabilis
(Under Convolvulaceae)
Mentioned in
a note
Ipomoea nil
(Under Convolvulaceae)
Mentioned in
a note
Ipomoea nil
(Under Ipomoea hederacea)
Mentioned in
a note
Ipomoea palmata
(Under Ipomoea cairica)
Synonym
Ipomoea purpureaCOMMON MORNING-GLORYWaif
Ipomoea trilobaAgricultural weed
Ipomopsis
  ↳  Key to Ipomopsis
SCARLET GILIA
Ipomopsis aggregataNative
Ipomopsis aggregata subsp. aggregataNative
Ipomopsis aggregata subsp. arizonica
(Under Ipomopsis arizonica)
Synonym
Ipomopsis aggregata subsp. attenuata
(Under Ipomopsis tenuituba)
Synonym
Ipomopsis aggregata subsp. bridgesiiNative
Ipomopsis aggregata subsp. formosissima
(Under Ipomopsis aggregata subsp. aggregata)
Synonym
Ipomopsis arizonicaNative
Ipomopsis congestaNative
Ipomopsis congesta subsp. congestaNative
Ipomopsis congesta subsp. montanaNative
Ipomopsis congesta subsp. palmifrons
(Under Ipomopsis congesta subsp. montana)
Synonym
Ipomopsis depressa
(Under Loeseliastrum depressum)
Synonym
Ipomopsis depressa
(Under Ipomopsis)
Mentioned in
a note
Ipomopsis effusaBAJA CALIFORNIA IPOMOPSISExtirpated waif
Ipomopsis polycladonNative
Ipomopsis tenuifoliaSLENDER-LEAVED IPOMOPSISNative
Ipomopsis tenuitubaNative
Iridaceae
  ↳  Key to Iridaceae
IRIS FAMILY
Iris
  ↳  Key to Iris
IRIS
Iris amabilis
(Under Iris macrosiphon)
Synonym
Iris bracteataSISKIYOU IRISNative
Iris californica
(Under Iris macrosiphon)
Synonym
Iris chrysophyllaYELLOW-FLOWERED IRISNative
Iris douglasianaNative
Iris douglasiana var. altissima
(Under Iris douglasiana)
Synonym
Iris douglasiana var. major
(Under Iris douglasiana)
Synonym
Iris douglasiana var. oregonensis
(Under Iris douglasiana)
Synonym
Iris fernaldiiNative
Iris foetidissimaCORAL IRISNaturalized
Iris germanicaNaturalized
Iris hartwegiiNative
Iris hartwegii subsp. australisNative
Iris hartwegii subsp. columbianaTUOLUMNE IRISNative
Iris hartwegii subsp. hartwegiiNative
Iris hartwegii subsp. pinetorumNative
Iris innominataDEL NORTE COUNTY IRISNative
Iris longipetalaCOAST IRISNative
Iris macrosiphonNative
Iris missouriensisWESTERN BLUE FLAGNative
Iris montana
(Under Iris missouriensis)
Synonym
Iris munziiMUNZ'S IRISNative
Iris pseudacorusNaturalized
Iris purdyiNative
Iris tenax subsp. klamathensisORLEANS IRISNative
Iris tenuissimaNative
Iris tenuissima subsp. purdyiformisNative
Iris tenuissima subsp. tenuissimaNative
Iris thompsoniiNative
Isatis
Isatis tinctoriaWOADNaturalized
Ismelia carinata
(Under Asteraceae (Compositae))
Mentioned in
a note
Isocoma
  ↳  Key to Isocoma
GOLDENBUSH
Isocoma acradeniaALKALI GOLDENBUSHNative
Isocoma acradenia var. acradeniaNative
Isocoma acradenia var. bracteosaNative
Isocoma acradenia var. eremophilaNative
Isocoma argutaCARQUINEZ GOLDENBUSHNative
Isocoma menziesiiCOASTAL GOLDENBUSHNative
Isocoma menziesii subsp. oxyphylla
(Under Isocoma menziesii var. menziesii)
Synonym
Isocoma menziesii var. decumbensDECUMBENT GOLDENBUSHNative
Isocoma menziesii var. diabolicaSATAN'S GOLDENBUSHNative
Isocoma menziesii var. menziesiiNative
Isocoma menziesii var. sedoidesNative
Isocoma menziesii var. vernonioidesNative
Isocoma tenuisecta
(Under Isocoma)
Mentioned in
a note
IsoetaceaeQUILLWORT FAMILY
Isoetes
  ↳  Key to Isoetes
QUILLWORT
Isoetes bolanderiNative
Isoetes bolanderi var. bolanderi
(Under Isoetes bolanderi)
Synonym
Isoetes bolanderi var. pygmaea
(Under Isoetes bolanderi)
Synonym
Isoetes braunii
(Under Isoetes echinospora)
Synonym
Isoetes echinosporaNative
Isoetes howelliiNative
Isoetes howellii var. minima
(Under Isoetes howellii)
Mentioned in
a note
Isoetes lacustris var. paupercula
(Under Isoetes occidentalis)
Synonym
Isoetes muricata
(Under Isoetes echinospora)
Synonym
Isoetes nuttalliiNative
Isoetes occidentalisNative
Isoetes orcuttiiNative
Isolepis
  ↳  Key to Isolepis
Isolepis carinataNative
Isolepis carinata
(Under Isolepis carinata)
Synonym
Isolepis cernuaNative
Isolepis koilolepis
(Under Isolepis carinata)
Synonym
Isolepis levynsianaNaturalized
Isolepis setaceaNaturalized
Isolepis tenella
(Under Isolepis levynsiana)
Synonym
Isomeris arborea
(Under Peritoma arborea)
Synonym
Isomeris arborea var. angustata
(Under Peritoma arborea var. angustata)
Synonym
Isomeris arborea var. arborea
(Under Peritoma arborea var. arborea)
Synonym
Isomeris arborea var. globosa
(Under Peritoma arborea var. globosa)
Synonym
Isomeris arborea var. insularis
(Under Peritoma arborea var. globosa)
Synonym
Isopyrum occidentale
(Under Enemion occidentale)
Synonym
Isopyrum stipitatum
(Under Enemion stipitatum)
Synonym
Isotrema californicum
(Under Aristolochia californica)
Synonym
Iva
  ↳  Key to Iva
MARSH-ELDER
Iva acerosa
(Under Euphrosyne acerosa)
Synonym
Iva axillarisPOVERTY WEEDNative
Iva axillaris subsp. robustior
(Under Iva axillaris)
Synonym
Iva axillaris var. robustior
(Under Iva axillaris)
Synonym
Iva hayesianaSAN DIEGO MARSH-ELDERNative
Iva nevadensis
(Under Euphrosyne nevadensis)
Synonym
Ivesia
  ↳  Key to Ivesia
Ivesia apertaNative
Ivesia aperta var. apertaSIERRA VALLEY IVESIANative
Ivesia aperta var. caninaDOG VALLEY IVESIANative
Ivesia argyrocoma var. argyrocomaSILVER-HAIRED IVESIANative
Ivesia argyrocoma var. moranii
(Under Ivesia argyrocoma var. argyrocoma)
Mentioned in
a note
Ivesia arizonica var. arizonicaYELLOW PURPUSIANative
Ivesia arizonica var. saxosa
(Under Ivesia arizonica var. arizonica)
Mentioned in
a note
Ivesia baileyiNative
Ivesia baileyi var. baileyiBAILEY'S IVESIANative
Ivesia baileyi var. beneolensOWYHEE IVESIANative
Ivesia callidaTAHQUITZ IVESIANative
Ivesia campestrisFIELD IVESIANative
Ivesia gordoniiNative
Ivesia gordonii var. alpicolaNative
Ivesia gordonii var. ursinorumNative
Ivesia jaegeriJAEGER'S IVESIANative
Ivesia kingii var. eremica
(Under Ivesia kingii var. kingii)
Mentioned in
a note
Ivesia kingii var. kingiiALKALI IVESIANative
Ivesia longibracteataCASTLE CRAGS IVESIANative
Ivesia lycopodioidesCLUB-MOSS IVESIANative
Ivesia lycopodioides subsp. lycopodioides
(Under Ivesia lycopodioides var. lycopodioides)
Synonym
Ivesia lycopodioides subsp. megalopetala
(Under Ivesia lycopodioides var. megalopetala)
Synonym
Ivesia lycopodioides subsp. scandularis
(Under Ivesia lycopodioides var. scandularis)
Synonym
Ivesia lycopodioides var. lycopodioidesNative
Ivesia lycopodioides var. megalopetalaNative
Ivesia lycopodioides var. scandularisNative
Ivesia muiriiNative
Ivesia paniculataASH CREEK IVESIANative
Ivesia patelliferaKINGSTON MOUNTAINS IVESIANative
Ivesia pickeringiiPICKERING'S IVESIANative
Ivesia pityocharis
(Under Ivesia sericoleuca)
Mentioned in
a note
Ivesia purpurascens subsp. congdonis
(Under Horkeliella congdonis)
Synonym
Ivesia purpurascens subsp. purpurascens
(Under Horkeliella purpurascens)
Synonym
Ivesia pygmaeaNative
Ivesia rhypara
(Under Ivesia paniculata)
Mentioned in
a note
Ivesia santolinoidesMOUSETAIL IVESIANative
Ivesia saxosaNative
Ivesia sericoleucaPLUMAS IVESIANative
Ivesia shockleyi var. ostleri
(Under Ivesia shockleyi var. shockleyi)
Mentioned in
a note
Ivesia shockleyi var. shockleyiNative
Ivesia unguiculataYOSEMITE IVESIANative
Ivesia webberiWEBBER'S IVESIANative
Ixia
Ixia maculataAFRICAN CORNLILYWaif