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 351–400 of 1,412 (introduced).

• 
  Coronopus didymus (L.) Sm. Introduced CODI6

  lesser swinecress · Brassicaceae 25 counties
• 
  Coronopus squamatus (Forssk.) Asch. Introduced COSQ

  greater swinecress · Brassicaceae 6 counties
• 
  Cortaderia jubata (Lem.) Stapf Introduced COJU2

  purple pampas grass · Poaceae 6 counties
• 
  Cortaderia selloana (Schult. & Schult. f.) Asch. & Graebn. Introduced COSE4

  Uruguayan pampas grass · Poaceae 19 counties
• 
  Corymbia citriodora (Hook.) K.D. Hill & L.A.S. Johnson Introduced COCI4

  lemonscented gum · Myrtaceae 1 county
• 
  Cosmos bipinnatus Cav. Introduced COBI2

  garden cosmos · Asteraceae 1 county
• 
  Cotoneaster franchetii Boiss. Introduced COFR3

  orange cotoneaster · Rosaceae 4 counties
• 
  Cotoneaster lacteus W.W. Sm. Introduced COLA18

  milkflower cotoneaster · Rosaceae 3 counties
• 
  Cotoneaster pannosus Franch. Introduced COPA14

  silverleaf cotoneaster · Rosaceae 5 counties
• 
  Cotoneaster simonsii Baker Introduced COSI82

  Simons' cotoneaster · Rosaceae 1 county
• 
  Cotula australis (Sieber ex Spreng.) Hook. f. Introduced COAU3

  Australian waterbuttons · Asteraceae 25 counties
• 
  Cotula coronopifolia L. Introduced COCO7

  common brassbuttons · Asteraceae 26 counties
• 
  Cotula mexicana (DC.) Cabrera Introduced COME15

  Mexican brassbuttons · Asteraceae 8 counties
• 
  Cotyledon orbiculata L. Introduced COOR2

  pig's ear · Crassulaceae 3 counties
• 
  Cotyledon orbiculata L. var. oblongata (Haw.) DC. Introduced COORO

  pig's ear · Crassulaceae 3 counties
• 
  Crassula multicava Lem. Introduced CRMU10

  Cape Province pygmyweed · Crassulaceae 2 counties
• 
  Crassula tillaea Lester-Garland Introduced CRTI

  moss pygmyweed · Crassulaceae 18 counties
• 
  Crataegus monogyna Jacq. Introduced CRMO3

  oneseed hawthorn · Rosaceae 5 counties
• 
  Crepis bursifolia L. Introduced CRBU3

  Italian hawksbeard · Asteraceae 1 county
• 
  Crepis capillaris (L.) Wallr. Introduced CRCA3

  smooth hawksbeard · Asteraceae 17 counties
• 
  Crepis rubra L. Introduced CRRU9

  red hawksbeard · Asteraceae 1 county
• 
  Crepis setosa Haller f. Introduced CRSE2

  bristly hawksbeard · Asteraceae 1 county
• 
  Crepis tectorum L. Introduced CRTE3

  narrowleaf hawksbeard · Asteraceae 2 counties
• 
  Crepis vesicaria L. Introduced CRVE3

  beaked hawksbeard · Asteraceae 6 counties
• 
  Crepis vesicaria L. ssp. taraxacifolia (Thuill.) Thell. Introduced CRVET

  beaked hawksbeard · Asteraceae 6 counties
• ⚘
  Crocosmia ×crocosmiiflora (V. Lemoine) N.E. Br. [aurea × pottsii] Introduced CRCR6

  montbretia · Iridaceae 5 counties
• 
  Crucianella angustifolia L. Introduced CRAN11

  narrowleaf crucianella · Rubiaceae 6 counties
• 
  Crupina vulgaris Cass. Introduced CRVU2

  common crupina · Asteraceae 2 counties
• 
  Crupina vulgaris Cass. var. vulgaris Introduced CRVUV

  common crupina · Asteraceae 2 counties
• 
  Crypsis alopecuroides (Piller & Mitterp.) Schrad. Introduced CRAL2

  foxtail pricklegrass · Poaceae 7 counties
• 
  Crypsis schoenoides (L.) Lam. Introduced CRSC

  swamp pricklegrass · Poaceae 33 counties
• 
  Crypsis vaginiflora (Forssk.) Opiz Introduced CRVA2

  modest prickle grass · Poaceae 27 counties
• 
  Cucumis anguria L. Introduced CUAN

  West Indian gherkin · Cucurbitaceae 1 county
• 
  Cucumis anguria L. var. anguria Introduced CUANA

  West Indian gherkin · Cucurbitaceae 1 county
• 
  Cucumis melo L. Introduced CUME

  cantaloupe · Cucurbitaceae 3 counties
• 
  Cucumis myriocarpus E. Mey. ex Naud. Introduced CUMY

  gooseberry gourd · Cucurbitaceae 4 counties
• 
  Cucurbita ficifolia Bouché Introduced CUFI2

  figleaf gourd · Cucurbitaceae 1 county
• 
  Cucurbita pepo L. var. medullosa Alef. Introduced CUPEM2

  field pumpkin · Cucurbitaceae 1 county
• 
  Cucurbita pepo L. var. pepo Introduced CUPEP

  field pumpkin · Cucurbitaceae 1 county
• 
  Cuscuta approximata Bab. Introduced CUAP2

  alfalfa dodder · Cuscutaceae 4 counties
• 
  Cuscuta reflexa Roxb. Introduced CURE

  giant dodder · Cuscutaceae 1 county
• 
  Cuscuta suaveolens Ser. Introduced CUSU

  fringed dodder · Cuscutaceae 5 counties
• 
  Cutandia memphitica (Spreng.) K. Richt. Introduced CUME2

  Memphisgrass · Poaceae 1 county
• 
  Cyanopsis muricata (L.) Dostál Introduced CYMU7

  Morocco knapweed · Asteraceae 2 counties
• 
  Cyathea cooperi (Hook. ex F. Muell.) Domin Introduced CYCO18

  Cooper's cyathea · Cyatheaceae 1 county
• 
  Cyclospermum leptophyllum (Pers.) Sprague ex Britton & P. Wilson Introduced CYLE7

  marsh parsley · Apiaceae 11 counties
• 
  Cydonia oblonga Mill. Introduced CYOB2

  quince · Rosaceae 3 counties
• 
  Cymbalaria muralis G. Gaertn., B. Mey. & Scherb. Introduced CYMU

  Kenilworth ivy · Scrophulariaceae 6 counties
• 
  Cynanchum louiseae Kartesz & Gandhi Introduced CYLO11

  Louise's swallow-wort · Asclepiadaceae 1 county
• 
  Cynara cardunculus L. Introduced CYCA

  cardoon · Asteraceae 42 counties