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 101–150 of 9,954.

• 
  Achnatherum thurberianum (Piper) Barkworth Native ACTH7

  Thurber's needlegrass · Poaceae 13 counties
• 
  Achnatherum webberi (Thurb.) Barkworth Native ACWE3

  Webber needlegrass · Poaceae 8 counties
• ⚘
  Achnatherum ×bloomeri (Bol.) Barkworth [hymenoides × occidentale] Native ACBL

  Poaceae 4 counties
• 
  Achyrachaena mollis Schauer Native ACMO2

  blow wives · Asteraceae 42 counties
• 
  Achyronychia cooperi Torr. & A. Gray Native ACCO3

  onyxflower · Caryophyllaceae 5 counties
• 
  Acleisanthes longiflora A. Gray Native ACLO2

  angel's trumpets · Nyctaginaceae 1 county
• 
  Aconitum columbianum Nutt. Native ACCO4

  Columbian monkshood · Ranunculaceae 26 counties
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  Aconitum columbianum Nutt. ssp. columbianum Native ACCOC3

  Columbian monkshood · Ranunculaceae 26 counties
• 
  Aconitum columbianum Nutt. ssp. viviparum (Greene) D.E. Brink Native ACCOV2

  Columbian monkshood · Ranunculaceae 4 counties
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae 2 counties
• 
  Acourtia microcephala DC. Native ACMI3

  sacapellote · Asteraceae 9 counties
• 
  Acrachne racemosa (Roem. & Schult.) Ohwi Introduced ACRA6

  goosegrass · Poaceae 1 county
• 
  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae 52 counties
• 
  Actaea rubra (Aiton) Willd. Native ACRU2

  red baneberry · Ranunculaceae 31 counties
• 
  Actaea rubra (Aiton) Willd. ssp. arguta (Nutt.) Hultén Native ACRUA8

  red baneberry · Ranunculaceae 31 counties
• 
  Adenocaulon bicolor Hook. Native ADBI

  American trailplant · Asteraceae 28 counties
• 
  Adenophyllum cooperi (A. Gray) Strother Native ADCO2

  Cooper's dogweed · Asteraceae 3 counties
• 
  Adenophyllum porophylloides (A. Gray) Strother Native ADPO

  San Felipe dogweed · Asteraceae 5 counties
• 
  Adenostoma fasciculatum Hook. & Arn. Native ADFA

  chamise · Rosaceae 38 counties
• 
  Adenostoma fasciculatum Hook. & Arn. var. fasciculatum Native ADFAF

  chamise · Rosaceae 38 counties
• 
  Adenostoma fasciculatum Hook. & Arn. var. obtusifolium S. Watson Native ADFAO

  chamise · Rosaceae 1 county
• 
  Adenostoma sparsifolium Torr. Native ADSP

  redshank · Rosaceae 8 counties
• 
  Adiantum aleuticum (Rupr.) Paris Native ADAL

  Aleutian maidenhair · Pteridaceae 33 counties
• 
  Adiantum capillus-veneris L. Native ADCA

  common maidenhair · Pteridaceae 19 counties
• 
  Adiantum jordanii C.H. Mull. Native ADJO

  California maidenhair · Pteridaceae 37 counties
• 
  Adiantum shastense Huiet & A.R. Sm. Native ADSH

  Shasta maidenhair · Pteridaceae 1 county
• ⚘
  Adiantum ×tracyi C.C. Hall ex W.H. Wagner [aleuticum × jordanii] Native ADTR3

  maidenhair fern · Pteridaceae 7 counties
• 
  Adolphia californica S. Watson Native ADCA2

  California prickbush · Rhamnaceae 1 county
• 
  Adonis aestivalis L. Introduced ADAE

  summer pheasant's eye · Ranunculaceae 3 counties
• 
  Aegilops cylindrica Host Introduced AECY

  jointed goatgrass · Poaceae 11 counties
• 
  Aegilops geniculata Roth Introduced AEGE

  ovate goatgrass · Poaceae 1 county
• 
  Aegilops neglecta Req. ex Bertol. Introduced AENE2

  three-awned goatgrass · Poaceae 1 county
• 
  Aegilops triuncialis L. Introduced AETR

  barbed goatgrass · Poaceae 26 counties
• 
  Aeonium arboreum (L.) Webb & Berthel. Introduced AEAR4

  tree aenium · Crassulaceae 1 county
• 
  Aeonium haworthii Webb & Bethel. Introduced AEHA2

  Haworth's aeonium · Crassulaceae 1 county
• 
  Aeschynomene rudis Benth. Native AERU

  zigzag jointvetch · Fabaceae 1 county
• 
  Aesculus californica (Spach) Nutt. Native AECA

  California buckeye · Hippocastanaceae 43 counties
• 
  Agapanthus praecox Willd. Introduced AGPR5

  African-lily · Liliaceae 1 county
• 
  Agastache parvifolia Eastw. Native AGPA2

  smallleaf giant hyssop · Lamiaceae 7 counties
• 
  Agastache urticifolia (Benth.) Kuntze Native AGUR

  nettleleaf giant hyssop · Lamiaceae 31 counties
• 
  Agastache urticifolia (Benth.) Kuntze var. glaucifolia (A. Heller) Cronquist Native AGURG

  nettleleaf giant hyssop · Lamiaceae 1 county
• 
  Agastache urticifolia (Benth.) Kuntze var. urticifolia Native AGURU

  nettleleaf giant hyssop · Lamiaceae 1 county
• 
  Agave americana L. Native AGAM

  American century plant · Agavaceae 2 counties
• 
  Agave americana L. ssp. americana Native AGAMA

  American century plant · Agavaceae 2 counties
• 
  Agave americana L. ssp. americana var. expansa (Jacobi) Gentry Native AGAME

  American century plant · Agavaceae 2 counties
• 
  Agave deserti Engelm. Native AGDE

  desert agave · Agavaceae 3 counties
• 
  Agave shawii Engelm. Native AGSH

  coastal agave · Agavaceae 1 county
• 
  Agave utahensis Engelm. Native AGUT

  Utah agave · Agavaceae 2 counties
• 
  Agave utahensis Engelm. var. eborispina (Hester) Breitung Native AGUTE

  Utah agave · Agavaceae 1 county
• 
  Agave utahensis Engelm. var. nevadensis Engelm. ex Greenm. & Roush Native AGUTN

  Nevada agave · Agavaceae 2 counties