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 1,401–1,412 of 1,412 (introduced).

• 
  Vulpia myuros (L.) C.C. Gmel. Introduced VUMY

  Poaceae 53 counties
• 
  Watsonia marginata (L. f.) Ker Gawl. Introduced WAMA2

  fragrant bugle-lily · Iridaceae 1 county
• 
  Watsonia meriana (L.) Mill. Introduced WAME

  bulbil bugle-lily · Iridaceae 2 counties
• 
  Wigandia urens (Ruiz & Pav.) Kunth Introduced WIUR

  Caracus wigandia · Hydrophyllaceae 2 counties
• 
  Wigandia urens (Ruiz & Pav.) Kunth var. caracasana (Kunth) D. Gibson Introduced WIURC

  Caracus wigandia · Hydrophyllaceae 2 counties
• 
  Xanthium spinosum L. Introduced XASP2

  spiny cocklebur · Asteraceae 32 counties
• 
  Xolantha guttata (L.) Raf. Introduced XOGU

  European frostweed · Cistaceae 2 counties
• 
  Zantedeschia aethiopica (L.) Spreng. Introduced ZAAE

  calla lily · Araceae 13 counties
• 
  Zea mays L. Introduced ZEMA

  corn · Poaceae 1 county
• 
  Zea mays L. ssp. mays Introduced ZEMAM2

  corn · Poaceae 1 county
• 
  Ziziphus zizyphus (L.) Karst. Introduced ZIZI

  common jujube · Rhamnaceae 3 counties
• 
  Zygophyllum fabago L. Introduced ZYFA

  Syrian beancaper · Zygophyllaceae 10 counties