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 901–950 of 1,412 (introduced).

• 
  Ornithopus sativus Brot. Introduced ORSA2

  common bird's-foot · Fabaceae 1 county
• 
  Ornithopus sativus Brot. ssp. isthmocarpus (Coss.) Dostál Introduced ORSAI

  common bird's-foot · Fabaceae 1 county
• 
  Orobanche aegyptiaca Pers. Introduced ORAE3

  Egyptian broomrape · Orobanchaceae 1 county
• 
  Orobanche hederae Duby Introduced ORHE3

  ivy broomrape · Orobanchaceae 1 county
• 
  Orobanche ramosa L. Introduced ORRA

  hemp broomrape · Orobanchaceae 4 counties
• 
  Oryza sativa L. Introduced ORSA

  rice · Poaceae 9 counties
• 
  Osteospermum ecklonis (DC.) Norl. Introduced OSEC

  blue and white daisybush · Asteraceae 2 counties
• 
  Osteospermum fruticosum (L.) Norl. Introduced OSFR4

  shrubby daisybush · Asteraceae 5 counties
• 
  Ottelia alismoides (L.) Pers. Introduced OTAL

  ducklettuce · Hydrocharitaceae 1 county
• 
  Oxalis bowiei Lindl. Introduced OXBO3

  red-flower woodsorrel · Oxalidaceae 1 county
• 
  Oxalis hirta L. Introduced OXHI

  tropical woodsorrel · Oxalidaceae 3 counties
• 
  Oxalis incarnata L. Introduced OXIN

  crimson woodsorrel · Oxalidaceae 2 counties
• 
  Oxalis pes-caprae L. Introduced OXPE

  Bermuda buttercup · Oxalidaceae 23 counties
• 
  Oxalis purpurea L. Introduced OXPU2

  purple woodsorrel · Oxalidaceae 3 counties
• 
  Oxalis radicosa A. Rich. Introduced OXRA

  dwarf woodsorrel · Oxalidaceae 12 counties
• 
  Oxalis rubra A. St.-Hil. Introduced OXRU

  windowbox woodsorrel · Oxalidaceae 9 counties
• 
  Pallenis maritima Greuter Introduced PAMA28

  estrella de mar · Asteraceae 1 county
• 
  Pancratium maritimum L. Introduced PAMA38

  sea-daffodil · Liliaceae 2 counties
• 
  Panicum antidotale Retz. Introduced PAAN4

  blue panicum · Poaceae 4 counties
• 
  Panicum miliaceum L. Introduced PAMI2

  proso millet · Poaceae 16 counties
• 
  Panicum miliaceum L. ssp. miliaceum Introduced PAMIM

  broomcorn millet · Poaceae 16 counties
• 
  Panicum repens L. Introduced PARE3

  torpedo grass · Poaceae 1 county
• 
  Papaver argemone L. Introduced PAAR3

  long pricklyhead poppy · Papaveraceae 2 counties
• 
  Papaver hybridum L. Introduced PAHY3

  round pricklyhead poppy · Papaveraceae 4 counties
• 
  Papaver rhoeas L. Introduced PARH2

  corn poppy · Papaveraceae 4 counties
• 
  Papaver somniferum L. Introduced PASO2

  opium poppy · Papaveraceae 5 counties
• 
  Parapholis incurva (L.) C.E. Hubbard Introduced PAIN

  curved sicklegrass · Poaceae 21 counties
• 
  Parapholis strigosa (Dumort.) C.E. Hubbard Introduced PAST20

  strigose sicklegrass · Poaceae 4 counties
• 
  Paraserianthes lophantha (Willd.) I.C. Nielsen Introduced PALO8

  plume albizia · Fabaceae 9 counties
• 
  Parentucellia latifolia (L.) Caruel Introduced PALA28

  broadleaf glandweed · Scrophulariaceae 3 counties
• 
  Parentucellia viscosa (L.) Caruel Introduced PAVI3

  yellow glandweed · Scrophulariaceae 8 counties
• 
  Parietaria judaica L. Introduced PAJU

  spreading pellitory · Urticaceae 8 counties
• 
  Paronychia echinulata Chater Introduced PAEC2

  Eurasian nailwort · Caryophyllaceae 1 county
• 
  Paronychia franciscana Eastw. Introduced PAFR

  San Francisco nailwort · Caryophyllaceae 4 counties
• 
  Paspalum dilatatum Poir. Introduced PADI3

  dallisgrass · Poaceae 39 counties
• 
  Paspalum notatum Flueggé var. saurae Parodi Introduced PANOS

  bahiagrass · Poaceae 1 county
• 
  Paspalum urvillei Steud. Introduced PAUR2

  Vasey's grass · Poaceae 4 counties
• 
  Passiflora caerulea L. Introduced PACA22

  bluecrown passionflower · Passifloraceae 5 counties
• 
  Passiflora manicata (Juss.) Pers. Introduced PAMA15

  red passionflower · Passifloraceae 1 county
• 
  Passiflora tarminiana Coppens & V.E. Barney Introduced PATA6

  banana passionflower · Passifloraceae 2 counties
• 
  Pastinaca sativa L. Introduced PASA2

  wild parsnip · Apiaceae 12 counties
• 
  Peganum harmala L. Introduced PEHA

  harmal peganum · Zygophyllaceae 2 counties
• 
  Pelargonium grossularioides (L.) L'Hér. ex Aiton Introduced PEGR12

  gooseberry geranium · Geraniaceae 9 counties
• 
  Pelargonium inquinans (L.) L'Hér. ex Aiton Introduced PEIN7

  scarlet geranium · Geraniaceae 9 counties
• 
  Pelargonium panduriforme Eckl. & Zeyh. Introduced PEPA52

  oakleaf garden geranium · Geraniaceae 17 counties
• 
  Pelargonium peltatum (L.) L'Hér. ex Aiton Introduced PEPE6

  ivyleaf geranium · Geraniaceae 1 county
• 
  Pelargonium quercifolium (L. f.) L'Hér. ex Aiton Introduced PEQU5

  oakleaf geranium · Geraniaceae 17 counties
• 
  Pelargonium vitifolium (L.) L'Hér. ex Aiton Introduced PEVI8

  grapeleaf geranium · Geraniaceae 3 counties
• 
  Pelargonium zonale (L.) L'Hér. ex Aiton Introduced PEZO

  horseshoe geranium · Geraniaceae 2 counties
• ⚘
  Pelargonium ×domesticum L.H. Bailey (pro sp.) [cucullatum × grandiflorum] Introduced PEDO2

  regal pelargonium · Geraniaceae 17 counties