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 6,951–7,000 of 9,954.

• 
  Orobanche californica Cham. & Schltdl. ssp. grayana (G. Beck) Heckard Native ORCAG2

  Gray's broomrape · Orobanchaceae 7 counties
• 
  Orobanche californica Cham. & Schltdl. ssp. jepsonii (Munz) Heckard Native ORCAJ

  Jepson's broomrape · Orobanchaceae 15 counties
• 
  Orobanche cooperi (A. Gray) A. Heller Native ORCO4

  desert broomrape · Orobanchaceae 7 counties
• 
  Orobanche corymbosa (Rydb.) Ferris Native ORCO5

  flat-top broomrape · Orobanchaceae 12 counties
• 
  Orobanche corymbosa (Rydb.) Ferris ssp. corymbosa Native ORCOC3

  flat-top broomrape · Orobanchaceae 12 counties
• 
  Orobanche fasciculata Nutt. Native ORFA

  clustered broomrape · Orobanchaceae 39 counties
• 
  Orobanche hederae Duby Introduced ORHE3

  ivy broomrape · Orobanchaceae 1 county
• 
  Orobanche ludoviciana Nutt. Native ORLU

  Louisiana broomrape · Orobanchaceae 1 county
• 
  Orobanche ludoviciana Nutt. ssp. ludoviciana Native ORLUL2

  Louisiana broomrape · Orobanchaceae 1 county
• 
  Orobanche parishii (Jeps.) Heckard Native ORPA2

  Parish's broomrape · Orobanchaceae 9 counties
• 
  Orobanche parishii (Jeps.) Heckard ssp. brachyloba Heckard Native ORPAB

  Parish's broomrape · Orobanchaceae 5 counties
• 
  Orobanche parishii (Jeps.) Heckard ssp. parishii Native ORPAP

  Parish's broomrape · Orobanchaceae 7 counties
• 
  Orobanche pinorum Geyer ex Hook. Native ORPI2

  conifer broomrape · Orobanchaceae 11 counties
• 
  Orobanche ramosa L. Introduced ORRA

  hemp broomrape · Orobanchaceae 4 counties
• 
  Orobanche uniflora L. Native ORUN

  oneflowered broomrape · Orobanchaceae 26 counties
• 
  Orobanche valida Jeps. Native ORVA

  Rock Creek broomrape · Orobanchaceae 8 counties
• 
  Orobanche valida Jeps. ssp. howellii Heckard & T.S. Collins Native ORVAH

  Howell's broomrape · Orobanchaceae 6 counties
• 
  Orobanche valida Jeps. ssp. valida Native ORVAV

  Rock Creek broomrape · Orobanchaceae 2 counties
• 
  Orobanche vallicola (Jeps.) Heckard Native ORVA2

  hillside broomrape · Orobanchaceae 14 counties
• 
  Orochaenactis thysanocarpha (A. Gray) Coville Native ORTH

  California mountainpincushion · Asteraceae 3 counties
• 
  Orogenia fusiformis S. Watson Native ORFU

  California Indian potato · Apiaceae 7 counties
• 
  Orthilia secunda (L.) House Native ORSE

  sidebells wintergreen · Pyrolaceae 19 counties
• 
  Orthocarpus bracteosus Benth. Native ORBR

  rosy owl's-clover · Scrophulariaceae 5 counties
• 
  Orthocarpus cuspidatus Greene Native ORCU

  toothed owl's-clover · Scrophulariaceae 23 counties
• 
  Orthocarpus cuspidatus Greene ssp. copelandii (Eastw.) T.I. Chuang & Heckard Native ORCUC

  Copeland's owl's-clover · Scrophulariaceae 5 counties
• 
  Orthocarpus cuspidatus Greene ssp. cryptanthus (Piper) T.I. Chuang & Heckard Native ORCUC2

  cryptantha owl's-clover · Scrophulariaceae 19 counties
• 
  Orthocarpus cuspidatus Greene ssp. cuspidatus Native ORCUC3

  Siskiyou Mountain owl's-clover · Scrophulariaceae 2 counties
• 
  Orthocarpus imbricatus Torr. ex S. Watson Native ORIM

  mountain owl's-clover · Scrophulariaceae 7 counties
• 
  Orthocarpus luteus Nutt. Native ORLU2

  yellow owl's-clover · Scrophulariaceae 11 counties
• 
  Orthocarpus pachystachyus A. Gray Native ORPA

  Shasta owl's-clover · Scrophulariaceae 1 county
• 
  Oryctes nevadensis S. Watson Native ORNE

  Nevada oryctes · Solanaceae 1 county
• 
  Oryza sativa L. Introduced ORSA

  rice · Poaceae 9 counties
• 
  Osmadenia tenella Nutt. Native OSTE

  false rosinweed · Asteraceae 5 counties
• 
  Osmorhiza berteroi DC. Native OSBE

  sweetcicely · Apiaceae 42 counties
• 
  Osmorhiza brachypoda Torr. Native OSBR

  California sweetcicely · Apiaceae 23 counties
• 
  Osmorhiza depauperata Phil. Native OSDE

  bluntseed sweetroot · Apiaceae 1 county
• 
  Osmorhiza occidentalis (Nutt. ex Torr. & A. Gray) Torr. Native OSOC

  western sweetroot · Apiaceae 21 counties
• 
  Osmorhiza purpurea (J.M. Coult. & Rose) Suksd. Native OSPU

  purple sweetroot · Apiaceae 2 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 albicans Kunth Native OXAL

  radishroot woodsorrel · Oxalidaceae 18 counties
• 
  Oxalis albicans Kunth ssp. californica (Abrams) Eiten Native OXALC

  California woodsorrel · Oxalidaceae 6 counties
• 
  Oxalis albicans Kunth ssp. pilosa (Nutt.) Eiten Native OXALP

  radishroot woodsorrel · Oxalidaceae 15 counties
• 
  Oxalis bowiei Lindl. Introduced OXBO3

  red-flower woodsorrel · Oxalidaceae 1 county
• 
  Oxalis corniculata L. Native OXCO

  creeping woodsorrel · Oxalidaceae 30 counties
• 
  Oxalis hirta L. Introduced OXHI

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

  crimson woodsorrel · Oxalidaceae 2 counties
• 
  Oxalis latifolia Kunth Native OXLA6

  broadleaf woodsorrel · Oxalidaceae 3 counties
• 
  Oxalis oregana Nutt. Native OXOR

  redwood-sorrel · Oxalidaceae 12 counties