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 7,851–7,900 of 9,954.

• 
  Polemonium chartaceum H. Mason Native POCH3

  Mason's Jacob's-ladder · Polemoniaceae 1 county
• 
  Polemonium eddyense Stubbs Native POED

  Mount Eddy Jacob's-ladder · Polemoniaceae 2 counties
• 
  Polemonium eximium Greene Native POEX

  skypilot · Polemoniaceae 7 counties
• 
  Polemonium micranthum Benth. Native POMI

  annual polemonium · Polemoniaceae 10 counties
• 
  Polemonium occidentale Greene Native POOC2

  western polemonium · Polemoniaceae 16 counties
• 
  Polemonium occidentale Greene ssp. occidentale Native POOCO

  western polemonium · Polemoniaceae 16 counties
• 
  Polemonium pulcherrimum Hook. Native POPU3

  Jacob's-ladder · Polemoniaceae 19 counties
• 
  Polemonium pulcherrimum Hook. ssp. pulcherrimum Native POPUP3

  Jacob's-ladder · Polemoniaceae 19 counties
• 
  Polemonium pulcherrimum Hook. var. shastense (Eastw.) Stubbs Native POPUS

  Mount Shasta Jacob's-ladder · Polemoniaceae 2 counties
• 
  Poliomintha incana (Torr.) A. Gray Native POIN3

  frosted mint · Lamiaceae 1 county
• 
  Polycarpon depressum Nutt. Native PODE

  California manyseed · Caryophyllaceae 11 counties
• 
  Polycarpon tetraphyllum (L.) L. Introduced POTE

  fourleaf manyseed · Caryophyllaceae 24 counties
• 
  Polycarpon tetraphyllum (L.) L. ssp. tetraphyllum Introduced POTET2

  fourleaf manyseed · Caryophyllaceae 24 counties
• 
  Polyctenium fremontii (S. Watson) Greene Native POFR

  desert combleaf · Brassicaceae 7 counties
• 
  Polyctenium fremontii (S. Watson) Greene var. fremontii Native POFRF2

  Fremont's combleaf · Brassicaceae 7 counties
• 
  Polyctenium williamsiae Rollins Native POWI

  Washoe combleaf · Brassicaceae 2 counties
• 
  Polygala acanthoclada A. Gray Native POAC2

  desert polygala · Polygalaceae 2 counties
• 
  Polygala californica Nutt. Native POCA5

  California milkwort · Polygalaceae 16 counties
• 
  Polygala cornuta Kellogg Native POCO4

  Sierra milkwort · Polygalaceae 27 counties
• 
  Polygala cornuta Kellogg var. cornuta Native POCOC

  Sierra milkwort · Polygalaceae 22 counties
• 
  Polygala cornuta Kellogg var. fishiae (Parry) Jeps. Native POCOF

  Sierra milkwort · Polygalaceae 6 counties
• 
  Polygala heterorhyncha (Barneby) T. Wendt Native POHE7

  beaked spiny polygala · Polygalaceae 1 county
• 
  Polygala intermontana T. Wendt Native POIN12

  Intermountain milkwort · Polygalaceae 1 county
• 
  Polygala myrtifolia L. Introduced POMY5

  myrtle-leaf milkwort · Polygalaceae 1 county
• 
  Polygala subspinosa S. Watson Native POSU2

  spiny milkwort · Polygalaceae 1 county
• 
  Polygonum amphibium L. Native POAM8

  water knotweed · Polygonaceae 46 counties
• 
  Polygonum amphibium L. var. emersum Michx. Native POAME

  longroot smartweed · Polygonaceae 39 counties
• 
  Polygonum amphibium L. var. stipulaceum Coleman Native POAMS

  water smartweed · Polygonaceae 25 counties
• 
  Polygonum arenastrum Jord. ex Boreau Introduced POAR11

  oval-leaf knotweed · Polygonaceae 54 counties
• 
  Polygonum argyrocoleon Steud. ex Kunze Introduced POAR5

  silversheath knotweed · Polygonaceae 20 counties
• 
  Polygonum aviculare L. Introduced POAV

  prostrate knotweed · Polygonaceae 1 county
• 
  Polygonum baldschuanicum Regel Introduced POBA3

  Bukhara fleeceflower · Polygonaceae 1 county
• 
  Polygonum bidwelliae S. Watson Native POBI4

  Bidwell's knotweed · Polygonaceae 3 counties
• 
  Polygonum bistortoides Pursh Native POBI6

  American bistort · Polygonaceae 32 counties
• 
  Polygonum bolanderi W.H. Brewer Native POBO3

  Bolander's knotweed · Polygonaceae 11 counties
• 
  Polygonum californicum Meisn. Native POCA7

  California knotweed · Polygonaceae 25 counties
• 
  Polygonum capitatum Buch.-Ham. ex D. Don Introduced POCA21

  pinkhead smartweed · Polygonaceae 4 counties
• 
  Polygonum convolvulus L. Introduced POCO10

  black bindweed · Polygonaceae 21 counties
• 
  Polygonum convolvulus L. var. convolvulus Introduced POCOC2

  black bindweed · Polygonaceae 21 counties
• 
  Polygonum cuspidatum Siebold & Zucc. Introduced POCU6

  Japanese knotweed · Polygonaceae 14 counties
• 
  Polygonum davisiae W.H. Brewer ex A. Gray Native PODA

  Davis' knotweed · Polygonaceae 19 counties
• 
  Polygonum douglasii Greene Native PODO4

  Douglas' knotweed · Polygonaceae 35 counties
• 
  Polygonum douglasii Greene ssp. austiniae (Greene) A.E. Murray Native PODOA2

  Austin knotweed · Polygonaceae 5 counties
• 
  Polygonum douglasii Greene ssp. douglasii Native PODOD4

  Douglas' knotweed · Polygonaceae 31 counties
• 
  Polygonum douglasii Greene ssp. johnstonii (Munz) J.C. Hickman Native PODOJ2

  Johnston's knotweed · Polygonaceae 19 counties
• 
  Polygonum douglasii Greene ssp. majus (Meisn.) J.C. Hickman Native PODOM2

  large knotweed · Polygonaceae 7 counties
• 
  Polygonum douglasii Greene ssp. spergulariiforme (Meisn. ex Small) J.C. Hickman Native PODOS2

  scatter knotweed · Polygonaceae 18 counties
• ⚘
  Polygonum heterosepalum M. Peck & Ownbey Native POHE2

  oddsepal knotweed · Polygonaceae 1 county
• 
  Polygonum hickmanii H. Hinds & R. Morgan Native POHI14

  Hickman's knotweed · Polygonaceae 1 county
• 
  Polygonum hydropiper L. Introduced POHY

  marshpepper knotweed · Polygonaceae 18 counties