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 4,851–4,900 of 9,954.

• 
  Hieracium gracile Hook. Native HIGR

  slender hawkweed · Asteraceae 17 counties
• 
  Hieracium gracile Hook. var. detonsum (A. Gray) A. Gray Native HIGRD

  low alpine hawkweed · Asteraceae 1 county
• 
  Hieracium gracile Hook. var. gracile Native HIGRG

  slender hawkweed · Asteraceae 1 county
• 
  Hieracium greenei A. Gray Native HIGR2

  Greene's hawkweed · Asteraceae 11 counties
• 
  Hieracium horridum Fr. Native HIHO

  prickly hawkweed · Asteraceae 19 counties
• 
  Hieracium scouleri Hook. Native HISC2

  Scouler's woollyweed · Asteraceae 14 counties
• 
  Hieracium scouleri Hook. var. nudicaule (A. Gray) Cronquist Native HISCN

  Scouler's woollyweed · Asteraceae 12 counties
• 
  Hieracium scouleri Hook. var. scouleri Native HISCS2

  Scouler's woollyweed · Asteraceae 1 county
• 
  Hierochloe hirta (Schrank) Borbás Native HIHI

  northern sweetgrass · Poaceae 3 counties
• 
  Hierochloe hirta (Schrank) Borbás ssp. arctica (J. Presl) G. Weim. Native HIHIA

  northern sweetgrass · Poaceae 3 counties
• 
  Hierochloe occidentalis Buckley Native HIOC

  California sweetgrass · Poaceae 10 counties
• 
  Hippuris vulgaris L. Native HIVU2

  common mare's-tail · Hippuridaceae 20 counties
• 
  Hirschfeldia incana (L.) Lagr.-Foss. Introduced HIIN3

  shortpod mustard · Brassicaceae 35 counties
• 
  Hoffmannseggia glauca (Ortega) Eifert Native HOGL2

  Indian rushpea · Fabaceae 9 counties
• 
  Hoffmannseggia microphylla Torr. Native HOMI5

  wand holdback · Fabaceae 4 counties
• 
  Hoheria populnea A. Cunn. Introduced HOPO5

  lacebark · Malvaceae 1 county
• 
  Hoita macrostachya (DC.) Rydb. Native HOMA4

  large leather-root · Fabaceae 38 counties
• 
  Hoita orbicularis (Lindl.) Rydb. Native HOOR

  roundleaf leather-root · Fabaceae 30 counties
• 
  Hoita strobilina (Hook. & Arn.) Rydb. Native HOST3

  Loma prieta · Fabaceae 4 counties
• 
  Holcus lanatus L. Introduced HOLA

  common velvetgrass · Poaceae 39 counties
• 
  Holcus mollis L. Introduced HOMO

  creeping velvetgrass · Poaceae 2 counties
• 
  Hollisteria lanata S. Watson Native HOLA2

  false spikeflower · Polygonaceae 10 counties
• 
  Holmgrenanthe petrophila (Coville & Morton) Elisens Native HOPE2

  rocklady · Scrophulariaceae 1 county
• 
  Holocarpha heermannii (Greene) D.D. Keck Native HOHE

  Heermann's tarweed · Asteraceae 16 counties
• 
  Holocarpha macradenia (DC.) Greene Native HOMA

  Santa Cruz tarplant · Asteraceae 5 counties
• 
  Holocarpha obconica (J.C. Clausen & D.D. Keck) D.D. Keck Native HOOB

  San Joaquin tarweed · Asteraceae 9 counties
• 
  Holocarpha obconica (J.C. Clausen & D.D. Keck) D.D. Keck ssp. autumnalis D.D. Keck Native HOOBA

  San Joaquin tarweed · Asteraceae 1 county
• 
  Holocarpha obconica (J.C. Clausen & D.D. Keck) D.D. Keck ssp. obconica Native HOOBO

  San Joaquin tarweed · Asteraceae 8 counties
• 
  Holocarpha virgata (A. Gray) D.D. Keck Native HOVI

  yellowflower tarweed · Asteraceae 31 counties
• 
  Holocarpha virgata (A. Gray) D.D. Keck ssp. elongata D.D. Keck Native HOVIE

  wand tarbush · Asteraceae 3 counties
• 
  Holocarpha virgata (A. Gray) D.D. Keck ssp. virgata Native HOVIV

  yellowflower tarweed · Asteraceae 28 counties
• 
  Holodiscus discolor (Pursh) Maxim. Native HODI

  oceanspray · Rosaceae 51 counties
• 
  Holosteum umbellatum L. Introduced HOUM

  jagged chickweed · Caryophyllaceae 5 counties
• 
  Holozonia filipes (Hook. & Arn.) Greene Native HOFI

  whitecrown · Asteraceae 17 counties
• ⚘
  Hordeum arizonicum Covas Native HOAR

  Arizona barley · Poaceae 1 county
• 
  Hordeum brachyantherum Nevski Native HOBR2

  meadow barley · Poaceae 51 counties
• 
  Hordeum brachyantherum Nevski ssp. brachyantherum Native HOBRB2

  meadow barley · Poaceae 44 counties
• 
  Hordeum brachyantherum Nevski ssp. californicum (Covas & Stebbins) Bothmer, N. Jacobsen & Seberg Native HOBRC2

  California barley · Poaceae 38 counties
• 
  Hordeum depressum (Scribn. & J.G. Sm.) Rydb. Native HODE2

  dwarf barley · Poaceae 27 counties
• 
  Hordeum intercedens Nevski Native HOIN2

  bobtail barley · Poaceae 11 counties
• 
  Hordeum jubatum L. Native HOJU

  foxtail barley · Poaceae 26 counties
• 
  Hordeum jubatum L. ssp. jubatum Native HOJUJ

  foxtail barley · Poaceae 26 counties
• 
  Hordeum marinum Huds. Introduced HOMA2

  seaside barley · Poaceae 47 counties
• 
  Hordeum marinum Huds. ssp. gussoneanum (Parl.) Thell. Introduced HOMAG

  Mediterranean barley · Poaceae 47 counties
• 
  Hordeum marinum Huds. ssp. marinum Introduced HOMAM

  seaside barley · Poaceae 1 county
• 
  Hordeum murinum L. Introduced HOMU

  mouse barley · Poaceae 51 counties
• 
  Hordeum murinum L. ssp. glaucum (Steud.) Tzvelev Introduced HOMUG

  smooth barley · Poaceae 35 counties
• 
  Hordeum murinum L. ssp. leporinum (Link) Arcang. Introduced HOMUL

  hare barley · Poaceae 47 counties
• 
  Hordeum murinum L. ssp. murinum Introduced HOMUM

  wall barley · Poaceae 3 counties
• 
  Hordeum pusillum Nutt. Native HOPU

  little barley · Poaceae 3 counties