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 1–50 of 1,412 (introduced).

• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae 18 counties
• 
  Acacia baileyana F. Muell. Introduced ACBA

  cootamundra wattle · Fabaceae 12 counties
• 
  Acacia cyclops A. Cunn. ex G. Don Introduced ACCY2

  coastal wattle · Fabaceae 1 county
• 
  Acacia dealbata Link Introduced ACDE3

  silver wattle · Fabaceae 23 counties
• 
  Acacia decurrens (Wendl. f.) Willd. Introduced ACDE

  green wattle · Fabaceae 11 counties
• 
  Acacia elata A. Cunn. ex Benth. Introduced ACEL

  cedar wattle · Fabaceae 1 county
• 
  Acacia longifolia (Andrews) Willd. Introduced ACLO

  Sydney golden wattle · Fabaceae 10 counties
• 
  Acacia melanoxylon R. Br. Introduced ACME

  blackwood · Fabaceae 13 counties
• 
  Acacia paradoxa DC. Introduced ACPA8

  paradox acacia · Fabaceae 11 counties
• 
  Acacia pycnantha Benth. Introduced ACPY3

  golden wattle · Fabaceae 2 counties
• 
  Acacia retinodes Schltdl. Introduced ACRE2

  water wattle · Fabaceae 5 counties
• 
  Acacia saligna (Labill.) Wendl. f. Introduced ACSA

  orange wattle · Fabaceae 1 county
• 
  Acacia verticillata (L'Hér.) Willd. Introduced ACVE2

  prickly Moses · Fabaceae 5 counties
• 
  Acaena novae-zelandiae Kirk Introduced ACNO7

  biddy-biddy · Rosaceae 7 counties
• 
  Acaena pallida (Kirk) Allen Introduced ACPA14

  pale biddy-biddy · Rosaceae 1 county
• 
  Acanthus mollis L. Introduced ACMO8

  bear's breech · Acanthaceae 1 county
• 
  Acer campestre L. Introduced ACCA5

  hedge maple · Aceraceae 1 county
• 
  Achillea filipendulina Lam. Introduced ACFI

  fernleaf yarrow · Asteraceae 2 counties
• 
  Achnatherum brachychaetum (Godr.) Barkworth Introduced ACBR5

  shortbristled needlegrass · Poaceae 7 counties
• 
  Achnatherum capense (Thunb.) P. Beauv. Introduced ACCA34

  Cape ricegrass · Poaceae 1 county
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae 2 counties
• 
  Acrachne racemosa (Roem. & Schult.) Ohwi Introduced ACRA6

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

  hardheads · Asteraceae 52 counties
• 
  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
• 
  Agapanthus praecox Willd. Introduced AGPR5

  African-lily · Liliaceae 1 county
• 
  Ageratina adenophora (Spreng.) R.M. King & H. Rob. Introduced AGAD2

  sticky snakeroot · Asteraceae 10 counties
• 
  Agropyron cristatum (L.) Gaertn. Introduced AGCR

  crested wheatgrass · Poaceae 4 counties
• 
  Agropyron cristatum (L.) Gaertn. ssp. pectinatum (M. Bieb.) Tzvelev Introduced AGCRP8

  crested wheatgrass · Poaceae 4 counties
• 
  Agropyron desertorum (Fisch. ex Link) Schult. Introduced AGDE2

  desert wheatgrass · Poaceae 12 counties
• 
  Agrostemma githago L. Introduced AGGI

  common corncockle · Caryophyllaceae 12 counties
• 
  Agrostis avenacea J.F. Gmel. Introduced AGAV

  Pacific bentgrass · Poaceae 18 counties
• 
  Agrostis capillaris L. Introduced AGCA5

  colonial bentgrass · Poaceae 18 counties
• 
  Agrostis castellana Boiss. & Reuter Introduced AGCA11

  bentgrass · Poaceae 3 counties
• 
  Agrostis gigantea Roth Introduced AGGI2

  redtop · Poaceae 39 counties
• 
  Agrostis stolonifera L. Introduced AGST2

  creeping bentgrass · Poaceae 35 counties
• 
  Ailanthus altissima (Mill.) Swingle Introduced AIAL

  tree of heaven · Simaroubaceae 35 counties
• 
  Aira caryophyllea L. Introduced AICA

  silver hairgrass · Poaceae 36 counties
• 
  Aira caryophyllea L. var. caryophyllea Introduced AICAC2

  silver hairgrass · Poaceae 1 county
• 
  Aira caryophyllea L. var. cupaniana (Guss.) Fiori Introduced AICAC3

  silver hairgrass · Poaceae 1 county
• 
  Aira elegans Willd. ex Kunth Introduced AIEL4

  annual silver hairgrass · Poaceae 10 counties
• 
  Aira praecox L. Introduced AIPR

  yellow hairgrass · Poaceae 6 counties
• 
  Albizia julibrissin Durazz. Introduced ALJU

  silktree · Fabaceae 1 county
• 
  Alcea rosea L. Introduced ALRO3

  hollyhock · Malvaceae 10 counties
• 
  Alhagi maurorum Medik. Introduced ALMA12

  camelthorn · Fabaceae 19 counties