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 1,301–1,350 of 1,412 (introduced).

• 
  Torilis nodosa (L.) Gaertn. Introduced TONO

  knotted hedgeparsley · Apiaceae 26 counties
• 
  Tradescantia fluminensis Vell. Introduced TRFL

  small-leaf spiderwort · Commelinaceae 6 counties
• 
  Tragopogon dubius Scop. Introduced TRDU

  yellow salsify · Asteraceae 21 counties
• 
  Tragopogon hybridus L. Introduced TRHY7

  pasture goatsbeard · Asteraceae 1 county
• 
  Tragopogon porrifolius L. Introduced TRPO

  salsify · Asteraceae 30 counties
• 
  Tragopogon pratensis L. Introduced TRPR

  Jack-go-to-bed-at-noon · Asteraceae 9 counties
• 
  Triadica sebifera (L.) Small Introduced TRSE6

  Chinese tallow · Euphorbiaceae 2 counties
• 
  Tribolium obliterum (Hemsl.) Renvoize Introduced TROB6

  Capetown grass · Poaceae 1 county
• 
  Tribulus terrestris L. Introduced TRTE

  puncturevine · Zygophyllaceae 47 counties
• 
  Trifolium alexandrinum L. Introduced TRAL6

  Egyptian clover · Fabaceae 1 county
• 
  Trifolium angustifolium L. Introduced TRAN6

  narrowleaf crimson clover · Fabaceae 4 counties
• 
  Trifolium arvense L. Introduced TRAR4

  rabbitfoot clover · Fabaceae 5 counties
• 
  Trifolium aureum Pollich Introduced TRAU2

  golden clover · Fabaceae 1 county
• 
  Trifolium campestre Schreb. Introduced TRCA5

  field clover · Fabaceae 21 counties
• 
  Trifolium cernuum Brot. Introduced TRCE9

  nodding clover · Fabaceae 2 counties
• 
  Trifolium dubium Sibth. Introduced TRDU2

  suckling clover · Fabaceae 28 counties
• 
  Trifolium fragiferum L. Introduced TRFR2

  strawberry clover · Fabaceae 16 counties
• 
  Trifolium gemellum Pourr. ex Willd. Introduced TRGE5

  Spanish clover · Fabaceae 1 county
• 
  Trifolium glomeratum L. Introduced TRGL4

  clustered clover · Fabaceae 10 counties
• 
  Trifolium hirtum All. Introduced TRHI4

  rose clover · Fabaceae 31 counties
• 
  Trifolium hybridum L. Introduced TRHY

  alsike clover · Fabaceae 23 counties
• 
  Trifolium incarnatum L. Introduced TRIN3

  crimson clover · Fabaceae 20 counties
• 
  Trifolium pratense L. Introduced TRPR2

  red clover · Fabaceae 32 counties
• 
  Trifolium repens L. Introduced TRRE3

  white clover · Fabaceae 45 counties
• 
  Trifolium resupinatum L. Introduced TRRE4

  reversed clover · Fabaceae 5 counties
• 
  Trifolium retusum L. Introduced TRRE10

  teasel clover · Fabaceae 1 county
• 
  Trifolium stellatum L. Introduced TRST13

  star clover · Fabaceae 1 county
• 
  Trifolium striatum L. Introduced TRST5

  knotted clover · Fabaceae 2 counties
• 
  Trifolium subterraneum L. Introduced TRSU3

  subterranean clover · Fabaceae 21 counties
• 
  Trifolium suffocatum L. Introduced TRSU12

  suffocating clover · Fabaceae 1 county
• 
  Trifolium tomentosum L. Introduced TRTO4

  woolly clover · Fabaceae 4 counties
• 
  Trifolium vesiculosum Savi Introduced TRVE

  arrowleaf clover · Fabaceae 3 counties
• 
  Trigonella corniculata (L.) L. Introduced TRCO7

  cultivated fenugreek · Fabaceae 1 county
• 
  Trigonella foenum-graecum L. Introduced TRFO80

  sicklefruit fenugreek · Fabaceae 2 counties
• 
  Trisetum flavescens (L.) P. Beauv. Introduced TRFL5

  yellow oatgrass · Poaceae 1 county
• 
  Tristagma uniflorum (Lindl.) Traub Introduced TRUN6

  springstar · Liliaceae 3 counties
• 
  Triticum aestivum L. Introduced TRAE

  common wheat · Poaceae 29 counties
• 
  Tropaeolum majus L. Introduced TRMA7

  nasturtium · Tropaeolaceae 15 counties
• 
  Tulipa clusiana DC. Introduced TUCL

  lady tulip · Liliaceae 1 county
• 
  Ulex europaeus L. Introduced ULEU

  common gorse · Fabaceae 20 counties
• 
  Ulmus parvifolia Jacq. Introduced ULPA

  Chinese elm · Ulmaceae 6 counties
• 
  Ulmus procera Salisb. Introduced ULPR

  English elm · Ulmaceae 11 counties
• 
  Ulmus pumila L. Introduced ULPU

  Siberian elm · Ulmaceae 7 counties
• ⚘
  Ulva clathratioides L.G. Kraft, Kraft, & R.F. Waller Introduced ULCL

  sea lettuce · Ulvaceae 1 county
• 
  Ulva pertusa Kjellman Introduced ULPE

  sea lettuce · Ulvaceae 2 counties
• 
  Urochloa maxima (Jacq.) R. Webster Introduced URMA3

  guineagrass · Poaceae 1 county
• 
  Urospermum picroides (L.) Scop. ex F.W. Schmidt Introduced URPI

  prickly goldenfleece · Asteraceae 5 counties
• 
  Urtica dioica L. ssp. dioica Introduced URDID

  stinging nettle · Urticaceae 1 county
• 
  Urtica urens L. Introduced URUR

  dwarf nettle · Urticaceae 28 counties
• 
  Vaccaria hispanica (Mill.) Rauschert Introduced VAHI2

  cow soapwort · Caryophyllaceae 18 counties