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 51–100 of 1,412 (introduced).

• 
  Alisma lanceolatum With. Introduced ALLA2

  lanceleaf water plantain · Alismataceae 7 counties
• 
  Allium ampeloprasum L. Introduced ALAM

  broadleaf wild leek · Liliaceae 1 county
• 
  Allium cepa L. Introduced ALCE

  garden onion · Liliaceae 1 county
• 
  Allium neapolitanum Cirillo Introduced ALNE3

  white garlic · Liliaceae 25 counties
• 
  Allium paniculatum L. Introduced ALPA20

  Mediterranean onion · Liliaceae 7 counties
• 
  Allium sativum L. Introduced ALSA2

  cultivated garlic · Liliaceae 1 county
• 
  Allium triquetrum L. Introduced ALTR4

  threecorner leek · Liliaceae 13 counties
• 
  Allium vineale L. Introduced ALVI

  wild garlic · Liliaceae 16 counties
• 
  Allium vineale L. ssp. vineale Introduced ALVIV

  wild garlic · Liliaceae 16 counties
• 
  Alnus cordata (Loisel.) Duby Introduced ALCO13

  Italian alder · Betulaceae 1 county
• ⚘
  Aloe ×schoenlandi Baker [saporaria × striata] Introduced ALSC12

  aloe · Aloaceae 1 county
• 
  Alopecurus geniculatus L. Introduced ALGE2

  water foxtail · Poaceae 18 counties
• 
  Alopecurus geniculatus L. var. geniculatus Introduced ALGEG4

  water foxtail · Poaceae 18 counties
• 
  Alopecurus myosuroides Huds. Introduced ALMY

  slender meadow foxtail · Poaceae 1 county
• 
  Alopecurus pratensis L. Introduced ALPR3

  meadow foxtail · Poaceae 12 counties
• 
  Alternanthera caracasana Kunth Introduced ALCA5

  washerwoman · Amaranthaceae 4 counties
• 
  Alternanthera philoxeroides (Mart.) Griseb. Introduced ALPH

  alligatorweed · Amaranthaceae 5 counties
• 
  Alyssum alyssoides (L.) L. Introduced ALAL3

  pale madwort · Brassicaceae 10 counties
• 
  Alyssum desertorum Stapf Introduced ALDE

  desert madwort · Brassicaceae 2 counties
• 
  Alyssum desertorum Stapf var. desertorum Introduced ALDED

  desert madwort · Brassicaceae 1 county
• 
  Alyssum desertorum Stapf var. himalayensis Dudley Introduced ALDEH

  desert madwort · Brassicaceae 1 county
• 
  Alyssum simplex Rudolphi Introduced ALSI8

  alyssum · Brassicaceae 3 counties
• 
  Alyssum strigosum Banks & Sol. Introduced ALST2

  alyssum · Brassicaceae 10 counties
• 
  Amaranthus albus L. Introduced AMAL

  prostrate pigweed · Amaranthaceae 41 counties
• 
  Amaranthus blitoides S. Watson Introduced AMBL

  mat amaranth · Amaranthaceae 39 counties
• 
  Amaranthus blitum L. Introduced AMBL2

  purple amaranth · Amaranthaceae 2 counties
• 
  Amaranthus blitum L. var. emarginatus (Salzm. ex Uline & W.L. Bray) Lambinon Introduced AMBLE2

  purple amaranth · Amaranthaceae 2 counties
• 
  Amaranthus caudatus L. Introduced AMCA3

  foxtail amaranth · Amaranthaceae 1 county
• 
  Amaranthus cruentus L. Introduced AMCR4

  red amaranth · Amaranthaceae 1 county
• 
  Amaranthus deflexus L. Introduced AMDE

  largefruit amaranth · Amaranthaceae 24 counties
• 
  Amaranthus hypochondriacus L. Introduced AMHY2

  Prince-of-Wales feather · Amaranthaceae 2 counties
• 
  Amaryllis belladonna L. Introduced AMBE3

  belladonna lily · Liliaceae 6 counties
• 
  Ambrosia artemisiifolia L. var. elatior (L.) Descourtils Introduced AMARE

  annual ragweed · Asteraceae 9 counties
• 
  Ammi majus L. Introduced AMMA

  large bullwort · Apiaceae 7 counties
• 
  Ammi visnaga (L.) Lam. Introduced AMVI2

  toothpickweed · Apiaceae 7 counties
• 
  Ammophila arenaria (L.) Link Introduced AMAR4

  European beachgrass · Poaceae 12 counties
• 
  Ampelodesmos mauritanicus (Poir.) T. Dur. & Schinz Introduced AMMA5

  Mauritanian grass · Poaceae 1 county
• 
  Amphibromus neesii Steud. Introduced AMNE4

  Australian wallaby grass · Poaceae 1 county
• 
  Anagallis arvensis L. Introduced ANAR

  scarlet pimpernel · Primulaceae 39 counties
• 
  Anagallis arvensis L. ssp. arvensis Introduced ANARA7

  scarlet pimpernel · Primulaceae 39 counties
• 
  Anagallis arvensis L. ssp. foemina (Mill.) Schinz & Thell. Introduced ANARF

  poorman's weatherglass · Primulaceae 1 county
• 
  Anagallis monelli L. Introduced ANMO2

  flaxleaf pimpernel · Primulaceae 3 counties
• 
  Anchusa arvensis (L.) M. Bieb. Introduced ANAR16

  small bugloss · Boraginaceae 1 county
• 
  Anchusa azurea Mill. Introduced ANAZ

  Italian bugloss · Boraginaceae 1 county
• 
  Anchusa officinalis L. Introduced ANOF

  common bugloss · Boraginaceae 2 counties
• 
  Anethum graveolens L. Introduced ANGR2

  dill · Apiaceae 2 counties
• 
  Anisodontea capensis (L.) D.M. Bates Introduced ANCA46

  Cape African-queen · Malvaceae 2 counties
• 
  Anredera cordifolia (Ten.) Steenis Introduced ANCO6

  heartleaf madeiravine · Basellaceae 5 counties
• 
  Anthemis arvensis L. Introduced ANAR6

  corn chamomile · Asteraceae 4 counties
• 
  Anthemis cotula L. Introduced ANCO2

  stinking chamomile · Asteraceae 41 counties