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 2,001–2,050 of 8,499 (native).

• 
  Chorizanthe polygonoides Torr. & A. Gray var. polygonoides Native CHPOP5

  knotweed spineflower · Polygonaceae 20 counties
• 
  Chorizanthe procumbens Nutt. Native CHPR4

  prostrate spineflower · Polygonaceae 6 counties
• 
  Chorizanthe pungens Benth. Native CHPU3

  Monterey spineflower · Polygonaceae 3 counties
• 
  Chorizanthe pungens Benth. var. hartwegiana Reveal & Hardham Native CHPUH2

  Hartweg's spineflower · Polygonaceae 1 county
• 
  Chorizanthe pungens Benth. var. pungens Native CHPUP3

  Monterey spineflower · Polygonaceae 3 counties
• 
  Chorizanthe rectispina Goodman Native CHRE

  prickly spineflower · Polygonaceae 3 counties
• 
  Chorizanthe rigida (Torr.) Torr. & A. Gray Native CHRI

  devil's spineflower · Polygonaceae 7 counties
• 
  Chorizanthe robusta Parry Native CHRO

  robust spineflower · Polygonaceae 6 counties
• 
  Chorizanthe robusta Parry var. hartwegii (Benth.) Reveal & R. Morgan Native CHROH

  robust spineflower · Polygonaceae 2 counties
• 
  Chorizanthe robusta Parry var. robusta Native CHROR

  robust spineflower · Polygonaceae 6 counties
• 
  Chorizanthe spinosa S. Watson Native CHSP

  Mojave spineflower · Polygonaceae 4 counties
• 
  Chorizanthe staticoides Benth. Native CHST4

  turkish rugging · Polygonaceae 9 counties
• 
  Chorizanthe stellulata Benth. Native CHST5

  starlet spineflower · Polygonaceae 15 counties
• 
  Chorizanthe uniaristata Torr. & A. Gray Native CHUN

  oneawn spineflower · Polygonaceae 11 counties
• 
  Chorizanthe valida S. Watson Native CHVA

  Sonoma spineflower · Polygonaceae 2 counties
• 
  Chorizanthe ventricosa Goodman Native CHVE3

  Priest Valley spineflower · Polygonaceae 4 counties
• 
  Chorizanthe watsonii Torr. & A. Gray Native CHWA2

  fivetooth spineflower · Polygonaceae 13 counties
• 
  Chorizanthe wheeleri S. Watson Native CHWH2

  Santa Barbara spineflower · Polygonaceae 1 county
• 
  Chorizanthe xanti S. Watson Native CHXA2

  Riverside spineflower · Polygonaceae 15 counties
• 
  Chorizanthe xanti S. Watson var. leucotheca Goodman Native CHXAL

  Riverside spineflower · Polygonaceae 3 counties
• 
  Chorizanthe xanti S. Watson var. xanti Native CHXAX

  Riverside spineflower · Polygonaceae 14 counties
• 
  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
• 
  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
• 
  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
• 
  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
• 
  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