California

• Alameda 06001
  1,856 taxa Open ↗
• Alpine 06003
  1,174 taxa Open ↗
• Amador 06005
  1,226 taxa Open ↗
• Butte 06007
  2,704 taxa Open ↗
• Calaveras 06009
  1,227 taxa Open ↗
• Colusa 06011
  1,330 taxa Open ↗
• Contra Costa 06013
  1,712 taxa Open ↗
• Del Norte 06015
  1,424 taxa Open ↗
• El Dorado 06017
  1,950 taxa Open ↗
• Fresno 06019
  2,373 taxa Open ↗

Showing 4,301–4,350 of 8,499 (native).

• 
  Hymenothrix loomisii S.F. Blake Native HYLO

  Loomis' thimblehead · Asteraceae 3 counties
• 
  Hymenothrix wrightii A. Gray Native HYWR

  Wright's thimblehead · Asteraceae 1 county
• 
  Hymenoxys cooperi (A. Gray) Cockerell Native HYCO2

  Cooper's rubberweed · Asteraceae 6 counties
• 
  Hymenoxys cooperi (A. Gray) Cockerell var. canescens (D.C. Eaton) K.F. Parker Native HYCOC

  Cooper's rubberweed · Asteraceae 3 counties
• 
  Hymenoxys cooperi (A. Gray) Cockerell var. cooperi Native HYCOC2

  Cooper's rubberweed · Asteraceae 3 counties
• 
  Hymenoxys hoopesii (A. Gray) Bierner Native HYHO

  owl's-claws · Asteraceae 12 counties
• 
  Hymenoxys lemmonii (Greene) Cockerell Native HYLE

  Lemmon's rubberweed · Asteraceae 5 counties
• 
  Hymenoxys odorata DC. Native HYOD

  bitter rubberweed · Asteraceae 4 counties
• 
  Hypericum anagalloides Cham. & Schltdl. Native HYAN2

  tinker's penny · Clusiaceae 41 counties
• 
  Hypericum concinnum Benth. Native HYCO3

  goldwire · Clusiaceae 19 counties
• 
  Hypericum mutilum L. Native HYMU

  dwarf St. Johnswort · Clusiaceae 4 counties
• 
  Hypericum scouleri Hook. Native HYSC5

  Scouler's St. Johnswort · Clusiaceae 42 counties
• 
  Hypericum scouleri Hook. ssp. scouleri Native HYSCS2

  Scouler's St. Johnswort · Clusiaceae 42 counties
• 
  Hyptis emoryi Torr. Native HYEM

  desert lavender · Lamiaceae 4 counties
• 
  Idahoa scapigera (Hook.) A. Nelson & J.F. Macbr. Native IDSC

  oldstem idahoa · Brassicaceae 15 counties
• ⚘
  Ilex ×attenuata Ashe [cassine × opaca] Native ILAT

  topal holly · Aquifoliaceae 1 county
• 
  Iliamna bakeri (Jeps.) Wiggins Native ILBA

  Baker's wild hollyhock · Malvaceae 8 counties
• 
  Iliamna latibracteata Wiggins Native ILLA2

  California wild hollyhock · Malvaceae 4 counties
• 
  Iliamna rivularis (Douglas ex Hook.) Greene Native ILRI

  streambank wild hollyhock · Malvaceae 1 county
• 
  Impatiens noli-tangere L. Native IMNO

  western touch-me-not · Balsaminaceae 1 county
• 
  Imperata brevifolia Vasey Native IMBR2

  California satintail · Poaceae 14 counties
• 
  Ionactis alpina (Nutt.) Greene Native IOAL

  Lava aster · Asteraceae 2 counties
• 
  Ipomoea lacunosa L. Native IPLA

  whitestar · Convolvulaceae 1 county
• 
  Ipomoea nil (L.) Roth Native IPNI

  whiteedge morning-glory · Convolvulaceae 3 counties
• 
  Ipomopsis aggregata (Pursh) V.E. Grant Native IPAG

  scarlet gilia · Polemoniaceae 29 counties
• 
  Ipomopsis aggregata (Pursh) V.E. Grant ssp. aggregata Native IPAGA3

  scarlet gilia · Polemoniaceae 1 county
• 
  Ipomopsis aggregata (Pursh) V.E. Grant ssp. bridgesii (A. Gray) V.E. Grant & A.D. Grant Native IPAGB

  scarlet gilia · Polemoniaceae 8 counties
• 
  Ipomopsis aggregata (Pursh) V.E. Grant ssp. formosissima (Greene) Wherry Native IPAGF

  scarlet gilia · Polemoniaceae 8 counties
• 
  Ipomopsis arizonica (Greene) Wherry Native IPAR2

  Arizona ipomopsis · Polemoniaceae 1 county
• 
  Ipomopsis congesta (Hook.) V.E. Grant Native IPCO5

  ballhead ipomopsis · Polemoniaceae 14 counties
• 
  Ipomopsis congesta (Hook.) V.E. Grant ssp. congesta Native IPCOC3

  ballhead ipomopsis · Polemoniaceae 5 counties
• 
  Ipomopsis congesta (Hook.) V.E. Grant ssp. montana (A. Nelson & Kennedy) V.E. Grant Native IPCOM

  ballhead ipomopsis · Polemoniaceae 9 counties
• 
  Ipomopsis congesta (Hook.) V.E. Grant ssp. palmifrons (Brand) Day Native IPCOP

  ballhead ipomopsis · Polemoniaceae 4 counties
• 
  Ipomopsis effusa (A. Gray) Moran Native IPEF

  Baja California ipomopsis · Polemoniaceae 1 county
• 
  Ipomopsis polycladon (Torr.) V.E. Grant Native IPPO2

  manybranched ipomopsis · Polemoniaceae 3 counties
• 
  Ipomopsis tenuifolia (A. Gray) V.E. Grant Native IPTE3

  slenderleaf skyrocket · Polemoniaceae 2 counties
• 
  Ipomopsis tenuituba (Rydb.) V.E. Grant Native IPTE4

  slendertube skyrocket · Polemoniaceae 8 counties
• 
  Ipomopsis tenuituba (Rydb.) V.E. Grant ssp. tenuituba Native IPTET2

  slendertube skyrocket · Polemoniaceae 8 counties
• 
  Iris bracteata S. Watson Native IRBR

  Siskiyou iris · Iridaceae 1 county
• 
  Iris chrysophylla Howell Native IRCH

  yellowleaf iris · Iridaceae 5 counties
• 
  Iris douglasiana Herb. Native IRDO

  Douglas iris · Iridaceae 15 counties
• 
  Iris fernaldii R.C. Foster Native IRFE

  Fernald's iris · Iridaceae 8 counties
• 
  Iris hartwegii Baker Native IRHA

  rainbow iris · Iridaceae 19 counties
• 
  Iris hartwegii Baker ssp. australis (Parish) Lenz Native IRHAA

  rainbow iris · Iridaceae 2 counties
• 
  Iris hartwegii Baker ssp. columbiana Lenz Native IRHAC

  rainbow iris · Iridaceae 1 county
• 
  Iris hartwegii Baker ssp. hartwegii Native IRHAH

  rainbow iris · Iridaceae 15 counties
• 
  Iris hartwegii Baker ssp. pinetorum (Eastw.) Lenz Native IRHAP

  rainbow iris · Iridaceae 4 counties
• 
  Iris innominata L.F. Hend. Native IRIN

  Del Norte County iris · Iridaceae 1 county
• 
  Iris macrosiphon Torr. Native IRMA

  bowltube iris · Iridaceae 27 counties
• 
  Iris missouriensis Nutt. Native IRMI

  Rocky Mountain iris · Iridaceae 33 counties