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 2,351–2,400 of 9,954.

• 
  Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist Native CHCH7

  giant chinquapin · Fagaceae 16 counties
• 
  Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist var. chrysophylla Native CHCHC4

  giant chinquapin · Fagaceae 7 counties
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  Chrysolepis chrysophylla (Douglas ex Hook.) Hjelmqvist var. minor (Benth.) Munz Native CHCHM

  giant chinquapin · Fagaceae 15 counties
• 
  Chrysolepis sempervirens (Kellogg) Hjelmqvist Native CHSE11

  bush chinquapin · Fagaceae 28 counties
• 
  Chrysosplenium glechomifolium Nutt. Native CHGL5

  Pacific golden saxifrage · Saxifragaceae 3 counties
• 
  Chrysothamnus albidus (M.E. Jones ex A. Gray) Greene Native CHAL9

  whiteflower rabbitbrush · Asteraceae 3 counties
• 
  Chrysothamnus depressus Nutt. Native CHDE2

  longflower rabbitbrush · Asteraceae 2 counties
• 
  Chrysothamnus gramineus H.M. Hall Native CHGR13

  Panamint rock goldenrod · Asteraceae 2 counties
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  Chrysothamnus greenei (A. Gray) Greene Native CHGR6

  Greene's rabbitbrush · Asteraceae 1 county
• 
  Chrysothamnus humilis Greene Native CHHU2

  Truckee rabbitbrush · Asteraceae 6 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. Native CHVI8

  yellow rabbitbrush · Asteraceae 33 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. axillaris (D.D. Keck) L.C. Anderson Native CHVIA4

  yellow rabbitbrush · Asteraceae 2 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. lanceolatus (Nutt.) H.M. Hall & Clem. Native CHVIL4

  yellow rabbitbrush · Asteraceae 5 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. puberulus (D.C. Eaton) H.M. Hall & Clem. Native CHVIP4

  yellow rabbitbrush · Asteraceae 7 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus Native CHVIV2

  yellow rabbitbrush · Asteraceae 33 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus var. latifolius (D.C. Eaton) Greene Native CHVIL10

  yellow rabbitbrush · Asteraceae 32 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus var. viscidiflorus Native CHVIV4

  yellow rabbitbrush · Asteraceae 5 counties
• 
  Cicendia quadrangularis (Lam.) Griseb. Native CIQU3

  Oregon timwort · Gentianaceae 26 counties
• 
  Cichorium endivia L. Introduced CIEN

  cultivated endive · Asteraceae 1 county
• 
  Cichorium intybus L. Introduced CIIN

  chicory · Asteraceae 27 counties
• 
  Cicuta douglasii (DC.) J.M. Coult. & Rose Native CIDO

  western water hemlock · Apiaceae 29 counties
• 
  Cicuta maculata L. Native CIMA2

  spotted water hemlock · Apiaceae 15 counties
• 
  Cicuta maculata L. var. angustifolia Hook. Native CIMAA

  spotted water hemlock · Apiaceae 5 counties
• 
  Cicuta maculata L. var. bolanderi (S. Watson) G. Mulligan Native CIMAB

  spotted water hemlock · Apiaceae 8 counties
• 
  Cicuta maculata L. var. maculata Native CIMAM

  spotted water hemlock · Apiaceae 11 counties
• 
  Cinna bolanderi Scribn. Native CIBO2

  Bolander's woodreed · Poaceae 3 counties
• 
  Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2

  drooping woodreed · Poaceae 15 counties
• 
  Cinnamomum camphora (L.) J. Presl Introduced CICA

  camphortree · Lauraceae 1 county
• 
  Circaea alpina L. Native CIAL

  small enchanter's nightshade · Onagraceae 27 counties
• 
  Circaea alpina L. ssp. pacifica (Asch. & Magnus) P.H. Raven Native CIALP2

  small enchanter's nightshade · Onagraceae 27 counties
• 
  Cirsium andersonii (A. Gray) Petr. Native CIAN

  rose thistle · Asteraceae 18 counties
• 
  Cirsium andrewsii (A. Gray) Jeps. Native CIAN2

  Franciscan thistle · Asteraceae 4 counties
• 
  Cirsium arizonicum (A. Gray) Petr. Native CIAR3

  Arizona thistle · Asteraceae 4 counties
• 
  Cirsium arvense (L.) Scop. Introduced CIAR4

  Canada thistle · Asteraceae 47 counties
• 
  Cirsium brevistylum Cronquist Native CIBR2

  clustered thistle · Asteraceae 20 counties
• ⚘
  Cirsium canovirens (Rydb.) Petr. Native CICA6

  graygreen thistle · Asteraceae 3 counties
• 
  Cirsium ciliolatum (L.F. Hend.) J.T. Howell Native CICI

  Ashland thistle · Asteraceae 1 county
• 
  Cirsium crassicaule (Greene) Jeps. Native CICR

  slough thistle · Asteraceae 3 counties
• 
  Cirsium cymosum (Greene) J.T. Howell Native CICY

  peregrine thistle · Asteraceae 20 counties
• 
  Cirsium douglasii DC. Native CIDO2

  Douglas' thistle · Asteraceae 23 counties
• 
  Cirsium douglasii DC. var. breweri (A. Gray) D.J. Keil & C.E. Turner Native CIDOB2

  Douglas' thistle · Asteraceae 17 counties
• 
  Cirsium douglasii DC. var. douglasii Native CIDOD

  Douglas' thistle · Asteraceae 11 counties
• 
  Cirsium fontinale (Greene) Jeps. Native CIFO2

  fountain thistle · Asteraceae 5 counties
• 
  Cirsium fontinale (Greene) Jeps. var. campylon (H. Sharsm.) Pilz ex Keil & C. Turner Native CIFOC

  Mt. Hamilton thistle · Asteraceae 3 counties
• 
  Cirsium fontinale (Greene) Jeps. var. fontinale Native CIFOF

  fountain thistle · Asteraceae 1 county
• 
  Cirsium fontinale (Greene) Jeps. var. obispoense J.T. Howell Native CIFOO

  Chorro Creek Bog thistle · Asteraceae 1 county
• 
  Cirsium hydrophilum (Greene) Jeps. Native CIHY

  Suisun thistle · Asteraceae 2 counties
• 
  Cirsium hydrophilum (Greene) Jeps. var. hydrophilum Native CIHYH

  Suisun thistle · Asteraceae 1 county
• 
  Cirsium hydrophilum (Greene) Jeps. var. vaseyi (A. Gray) J.T. Howell Native CIHYV

  Vasey's thistle · Asteraceae 1 county
• 
  Cirsium loncholepis Petr. Native CILO

  la graciosa thistle · Asteraceae 2 counties