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 4,651–4,700 of 9,954.

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  Harmonia nutans (Greene) B.G. Baldw. Native HANU3

  nodding madia · Asteraceae 2 counties
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  Harmonia stebbinsii (T.W. Nelson & J.P. Nelson) B.G. Baldw. Native HAST10

  Stebbins' tarweed · Asteraceae 3 counties
• 
  Harpagonella palmeri A. Gray Native HAPA7

  Palmer's grapplinghook · Boraginaceae 4 counties
• 
  Harpagonella palmeri A. Gray var. palmeri Native HAPAP2

  Palmer's grapplinghook · Boraginaceae 4 counties
• 
  Hastingsia alba (Durand) S. Watson Native HAAL2

  white rushlily · Liliaceae 13 counties
• 
  Hastingsia serpentinicola Becking Native HASE3

  Klamath rushlily · Liliaceae 1 county
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  Hazardia brickellioides (S.F. Blake) W.D. Clark Native HABR3

  brickellbush goldenweed · Asteraceae 2 counties
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  Hazardia cana (A. Gray) Greene Native HACA6

  island hazardia · Asteraceae 1 county
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  Hazardia detonsa (Greene) Greene Native HADE4

  island bristleweed · Asteraceae 2 counties
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  Hazardia orcuttii (A. Gray) Greene Native HAOR3

  Orcutt's bristleweed · Asteraceae 1 county
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  Hazardia squarrosa (Hook. & Arn.) Greene Native HASQ2

  sawtooth goldenbush · Asteraceae 10 counties
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  Hazardia squarrosa (Hook. & Arn.) Greene var. grindelioides (DC.) W.D. Clark Native HASQG2

  sawtooth bristleweed · Asteraceae 9 counties
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  Hazardia squarrosa (Hook. & Arn.) Greene var. obtusa (Greene) Jeps. Native HASQO2

  sawtooth bristleweed · Asteraceae 4 counties
• 
  Hazardia squarrosa (Hook. & Arn.) Greene var. squarrosa Native HASQS2

  sawtooth goldenbush · Asteraceae 3 counties
• 
  Hazardia stenolepis (H.M. Hall) Hoover Native HAST4

  serpentine bristleweed · Asteraceae 5 counties
• 
  Hazardia whitneyi (A. Gray) Greene Native HAWH3

  Whitney's bristleweed · Asteraceae 20 counties
• 
  Hazardia whitneyi (A. Gray) Greene var. discoidea (J.T. Howell) W.D. Clark Native HAWHD2

  Whitney's bristleweed · Asteraceae 9 counties
• 
  Hazardia whitneyi (A. Gray) Greene var. whitneyi Native HAWHW

  Whitney's bristleweed · Asteraceae 11 counties
• 
  Hebe speciosa (R. Cunn. ex A. Cunn.) J.C. Andersen Introduced HESP

  New Zealand hebe · Scrophulariaceae 1 county
• ⚘
  Hebe ×franciscana (Eastw.) Souster [elliptica × speciosa] Introduced HEFR

  hebe · Scrophulariaceae 1 county
• 
  Hecastocleis shockleyi A. Gray Native HESH

  prickleleaf · Asteraceae 3 counties
• 
  Hedeoma nana (Torr.) Briq. Native HENA

  dwarf false pennyroyal · Lamiaceae 2 counties
• 
  Hedeoma nana (Torr.) Briq. ssp. californica W.S. Stewart Native HENAC

  California false pennyroyal · Lamiaceae 2 counties
• 
  Hedera helix L. Introduced HEHE

  English ivy · Araliaceae 15 counties
• 
  Hedera helix L. ssp. canariensis (Willd.) Cout. Introduced HEHEC

  Algerian ivy · Araliaceae 4 counties
• 
  Hedypnois cretica (L.) Dum. Cours. Introduced HECR2

  Cretanweed · Asteraceae 22 counties
• 
  Helenium amarum (Raf.) H. Rock Native HEAM

  sneezeweed · Asteraceae 2 counties
• 
  Helenium amarum (Raf.) H. Rock var. amarum Native HEAMA

  sneezeweed · Asteraceae 2 counties
• 
  Helenium autumnale L. Native HEAU

  common sneezeweed · Asteraceae 4 counties
• 
  Helenium autumnale L. var. grandiflorum (Nutt.) Torr. & A. Gray Native HEAUG

  fall sneezeweed · Asteraceae 3 counties
• 
  Helenium autumnale L. var. montanum (Nutt.) Fernald Native HEAUM

  mountain sneezeweed · Asteraceae 2 counties
• 
  Helenium bigelovii A. Gray Native HEBI

  Bigelow's sneezeweed · Asteraceae 37 counties
• 
  Helenium bolanderi A. Gray Native HEBO2

  coastal sneezeweed · Asteraceae 4 counties
• 
  Helenium puberulum DC. Native HEPU2

  rosilla · Asteraceae 41 counties
• 
  Helianthella californica A. Gray Native HECA

  California helianthella · Asteraceae 31 counties
• 
  Helianthella californica A. Gray ssp. californica Native HECAC3

  California helianthella · Asteraceae 9 counties
• 
  Helianthella californica A. Gray ssp. nevadensis (Greene) W.A. Weber Native HECAN2

  Nevada helianthella · Asteraceae 22 counties
• 
  Helianthella californica A. Gray ssp. shastensis (W.A. Weber) W.A. Weber Native HECAS4

  Shasta helianthella · Asteraceae 3 counties
• 
  Helianthella castanea Greene Native HECA2

  Mt. Diablo helianthella · Asteraceae 5 counties
• 
  Helianthella quinquenervis (Hook.) A. Gray Native HEQU2

  fivenerve helianthella · Asteraceae 1 county
• 
  Helianthemum greenei B.L. Rob. Native HEGR2

  island rushrose · Cistaceae 2 counties
• 
  Helianthemum scoparium Nutt. Native HESC2

  Bisbee Peak rushrose · Cistaceae 27 counties
• 
  Helianthus annuus L. Native HEAN3

  common sunflower · Asteraceae 40 counties
• 
  Helianthus bolanderi A. Gray Native HEBO3

  serpentine sunflower · Asteraceae 29 counties
• 
  Helianthus californicus DC. Native HECA5

  California sunflower · Asteraceae 16 counties
• 
  Helianthus ciliaris DC. Native HECI

  Texas blueweed · Asteraceae 10 counties
• 
  Helianthus cusickii A. Gray Native HECU2

  Cusick's sunflower · Asteraceae 4 counties
• 
  Helianthus gracilentus A. Gray Native HEGR3

  slender sunflower · Asteraceae 16 counties
• 
  Helianthus maximiliani Schrad. Native HEMA2

  Maximilian sunflower · Asteraceae 7 counties
• 
  Helianthus niveus (Benth.) Brandegee Native HENI3

  showy sunflower · Asteraceae 3 counties