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 1,201–1,250 of 1,412 (introduced).

• 
  Silene gallica L. Introduced SIGA

  common catchfly · Caryophyllaceae 38 counties
• 
  Silene latifolia Poir. Introduced SILA21

  bladder campion · Caryophyllaceae 3 counties
• 
  Silene latifolia Poir. ssp. alba (Mill.) Greuter & Burdet Introduced SILAA3

  bladder campion · Caryophyllaceae 3 counties
• 
  Silene noctiflora L. Introduced SINO

  nightflowering silene · Caryophyllaceae 4 counties
• 
  Silene pseudatocion Desf. Introduced SIPS2

  North African catchfly · Caryophyllaceae 3 counties
• 
  Silene vulgaris (Moench) Garcke Introduced SIVU

  maidenstears · Caryophyllaceae 7 counties
• 
  Silybum marianum (L.) Gaertn. Introduced SIMA3

  blessed milkthistle · Asteraceae 34 counties
• 
  Sinapis alba L. Introduced SIAL5

  white mustard · Brassicaceae 7 counties
• 
  Sinapis arvensis L. Introduced SIAR4

  charlock mustard · Brassicaceae 32 counties
• 
  Sinapis arvensis L. ssp. arvensis Introduced SIARA

  wild mustard · Brassicaceae 32 counties
• 
  Sisymbrium altissimum L. Introduced SIAL2

  tall tumblemustard · Brassicaceae 37 counties
• 
  Sisymbrium erysimoides Desf. Introduced SIER5

  Mediterranean rocket · Brassicaceae 1 county
• 
  Sisymbrium irio L. Introduced SIIR

  London rocket · Brassicaceae 22 counties
• 
  Sisymbrium loeselii L. Introduced SILO3

  small tumbleweed mustard · Brassicaceae 9 counties
• 
  Sisymbrium officinale (L.) Scop. Introduced SIOF

  hedgemustard · Brassicaceae 35 counties
• 
  Sisymbrium orientale L. Introduced SIOR4

  Indian hedgemustard · Brassicaceae 22 counties
• 
  Solanum aviculare G. Forst. Introduced SOAV

  New Zealand nightshade · Solanaceae 5 counties
• 
  Solanum cardiophyllum Lindl. Introduced SOCA19

  heartleaf horsenettle · Solanaceae 1 county
• 
  Solanum dulcamara L. Introduced SODU

  climbing nightshade · Solanaceae 5 counties
• 
  Solanum dulcamara L. var. dulcamara Introduced SODUD

  climbing nightshade · Solanaceae 5 counties
• 
  Solanum furcatum Dunal ex Poir. Introduced SOFU4

  forked nightshade · Solanaceae 6 counties
• 
  Solanum gayanum (Remy) Phil. f. Introduced SOGA2

  Chilean nightshade · Solanaceae 1 county
• 
  Solanum lanceolatum Cav. Introduced SOLA

  orangeberry nightshade · Solanaceae 22 counties
• 
  Solanum lycopersicum L. Introduced SOLY2

  garden tomato · Solanaceae 17 counties
• 
  Solanum lycopersicum L. var. lycopersicum Introduced SOLYL

  garden tomato · Solanaceae 17 counties
• 
  Solanum marginatum L. f. Introduced SOMA

  purple African nightshade · Solanaceae 12 counties
• 
  Solanum nigrum L. Introduced SONI

  black nightshade · Solanaceae 13 counties
• 
  Solanum peruvianum L. Introduced SOPE9

  Peruvian nightshade · Solanaceae 1 county
• 
  Solanum physalifolium Rusby Introduced SOPH

  hoe nightshade · Solanaceae 25 counties
• 
  Solanum scabrum Mill. Introduced SOSC6

  garden-huckleberry · Solanaceae 3 counties
• 
  Solanum sisymbriifolium Lam. Introduced SOSI

  sticky nightshade · Solanaceae 1 county
• 
  Solanum tuberosum L. Introduced SOTU

  Irish potato · Solanaceae 2 counties
• 
  Solanum villosum (L.) Mill. Introduced SOVI8

  hairy nightshade · Solanaceae 1 county
• 
  Soleirolia soleirolii (Req.) Dandy Introduced SOSO

  mother of thousands · Urticaceae 12 counties
• 
  Soliva sessilis Ruiz & Pav. Introduced SOSE2

  field burrweed · Asteraceae 37 counties
• 
  Sollya heterophylla Lindl. Introduced SOHE2

  bluebell creeper · Pittosporaceae 15 counties
• 
  Sonchus arvensis L. Introduced SOAR2

  field sowthistle · Asteraceae 12 counties
• 
  Sonchus arvensis L. ssp. arvensis Introduced SOARA2

  field sowthistle · Asteraceae 12 counties
• 
  Sonchus asper (L.) Hill Introduced SOAS

  spiny sowthistle · Asteraceae 46 counties
• 
  Sonchus oleraceus L. Introduced SOOL

  common sowthistle · Asteraceae 36 counties
• 
  Sonchus tenerrimus L. Introduced SOTE3

  slender sowthistle · Asteraceae 9 counties
• 
  Sorbus aucuparia L. Introduced SOAU

  European mountain ash · Rosaceae 1 county
• 
  Sorghum bicolor (L.) Moench Introduced SOBI2

  sorghum · Poaceae 22 counties
• 
  Sorghum bicolor (L.) Moench ssp. bicolor Introduced SOBIB

  grain sorghum · Poaceae 1 county
• 
  Sorghum bicolor (L.) Moench ssp. drummondii (Nees ex Steud.) de Wet & Harlan Introduced SOBID

  Sudangrass · Poaceae 3 counties
• 
  Sorghum halepense (L.) Pers. Introduced SOHA

  Johnsongrass · Poaceae 40 counties
• 
  Sparaxis fragrans (Jacq.) Ker Gawl. Introduced SPFR2

  fragrant wandflower · Iridaceae 1 county
• 
  Sparaxis fragrans (Jacq.) Ker Gawl. ssp. grandiflora (D. Delar.) Goldbl. Introduced SPFRG

  fragrant wandflower · Iridaceae 1 county
• 
  Sparganium erectum L. Introduced SPER

  simplestem bur-reed · Sparganiaceae 13 counties
• 
  Sparganium erectum L. ssp. stoloniferum (Graebn.) H. Hara Introduced SPERS2

  simplestem bur-reed · Sparganiaceae 13 counties