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 7,151–7,200 of 8,499 (native).

• 
  Ranunculus eschscholtzii Schltdl. Native RAES

  Eschscholtz's buttercup · Ranunculaceae 19 counties
• 
  Ranunculus eschscholtzii Schltdl. var. oxynotus (A. Gray) Jeps. Native RAESO

  Eschscholtz's buttercup · Ranunculaceae 15 counties
• 
  Ranunculus flabellaris Raf. Native RAFL

  yellow water buttercup · Ranunculaceae 7 counties
• 
  Ranunculus flammula L. Native RAFL2

  greater creeping spearwort · Ranunculaceae 23 counties
• 
  Ranunculus flammula L. var. flammula Native RAFLF2

  greater creeping spearwort · Ranunculaceae 23 counties
• 
  Ranunculus glaberrimus Hook. Native RAGL

  sagebrush buttercup · Ranunculaceae 8 counties
• 
  Ranunculus glaberrimus Hook. var. ellipticus (Greene) Greene Native RAGLE

  elliptical buttercup · Ranunculaceae 7 counties
• 
  Ranunculus glaberrimus Hook. var. glaberrimus Native RAGLG

  sagebrush buttercup · Ranunculaceae 3 counties
• 
  Ranunculus gormanii Greene Native RAGO

  Gorman's buttercup · Ranunculaceae 3 counties
• 
  Ranunculus hebecarpus Hook. & Arn. Native RAHE

  delicate buttercup · Ranunculaceae 42 counties
• 
  Ranunculus hydrocharoides A. Gray Native RAHY

  frogbit buttercup · Ranunculaceae 2 counties
• 
  Ranunculus hydrocharoides A. Gray var. hydrocharoides Native RAHYH

  frogbit buttercup · Ranunculaceae 2 counties
• 
  Ranunculus lobbii (Hiern.) A. Gray Native RALO

  Lobb's buttercup · Ranunculaceae 9 counties
• 
  Ranunculus longirostris Godr. Native RALO2

  longbeak buttercup · Ranunculaceae 4 counties
• 
  Ranunculus macounii Britton Native RAMA2

  Macoun's buttercup · Ranunculaceae 3 counties
• 
  Ranunculus occidentalis Nutt. Native RAOC

  western buttercup · Ranunculaceae 39 counties
• 
  Ranunculus occidentalis Nutt. var. occidentalis Native RAOCO

  western buttercup · Ranunculaceae 39 counties
• 
  Ranunculus orthorhynchus Hook. Native RAOR3

  straightbeak buttercup · Ranunculaceae 33 counties
• 
  Ranunculus orthorhynchus Hook. var. bloomeri (S. Watson) L.D. Benson Native RAORB

  Bloomer's buttercup · Ranunculaceae 12 counties
• 
  Ranunculus orthorhynchus Hook. var. orthorhynchus Native RAORO

  straightbeak buttercup · Ranunculaceae 29 counties
• 
  Ranunculus populago Greene Native RAPO

  popular buttercup · Ranunculaceae 5 counties
• 
  Ranunculus pusillus Poir. Native RAPU

  low spearwort · Ranunculaceae 12 counties
• 
  Ranunculus pusillus Poir. var. pusillus Native RAPUP

  low spearwort · Ranunculaceae 12 counties
• 
  Ranunculus sceleratus L. Native RASC3

  cursed buttercup · Ranunculaceae 14 counties
• 
  Ranunculus sceleratus L. var. multifidus Nutt. Native RASCM

  cursed buttercup · Ranunculaceae 14 counties
• ⚘
  Ranunculus suksdorfii A. Gray Native RASU4

  Suksdorf's buttercup · Ranunculaceae 1 county
• 
  Ranunculus trichophyllus Chaix Native RATR

  threadleaf crowfoot · Ranunculaceae 44 counties
• 
  Ranunculus trichophyllus Chaix var. trichophyllus Native RATRT

  threadleaf crowfoot · Ranunculaceae 44 counties
• 
  Ranunculus uncinatus D. Don ex G. Don Native RAUN

  woodland buttercup · Ranunculaceae 22 counties
• 
  Ranunculus uncinatus D. Don ex G. Don var. parviflorus (Torr.) L.D. Benson Native RAUNP

  Idaho buttercup · Ranunculaceae 22 counties
• 
  Ranunculus uncinatus D. Don ex G. Don var. uncinatus Native RAUNU

  woodland buttercup · Ranunculaceae 2 counties
• 
  Ratibida columnifera (Nutt.) Wooton & Standl. Native RACO3

  upright prairie coneflower · Asteraceae 4 counties
• 
  Rhamnus alnifolia L'Hér. Native RHAL

  alderleaf buckthorn · Rhamnaceae 4 counties
• 
  Rhamnus crocea Nutt. Native RHCR

  redberry buckthorn · Rhamnaceae 20 counties
• 
  Rhamnus crocea Nutt. ssp. crocea Native RHCRC

  redberry buckthorn · Rhamnaceae 19 counties
• 
  Rhamnus crocea Nutt. ssp. pilosa (Trel.) C.B. Wolf Native RHCRP2

  hollyleaf buckthorn · Rhamnaceae 2 counties
• 
  Rhamnus ilicifolia Kellogg Native RHIL

  hollyleaf redberry · Rhamnaceae 43 counties
• 
  Rhamnus pirifolia Greene Native RHPI

  island redberry · Rhamnaceae 2 counties
• 
  Rhodiola integrifolia Raf. Native RHIN11

  ledge stonecrop · Crassulaceae 13 counties
• 
  Rhodiola integrifolia Raf. ssp. integrifolia Native RHINI

  ledge stonecrop · Crassulaceae 13 counties
• 
  Rhododendron macrophyllum D. Don ex G. Don Native RHMA3

  Pacific rhododendron · Ericaceae 9 counties
• 
  Rhododendron occidentale (Torr. & A. Gray) A. Gray Native RHOC

  western azalea · Ericaceae 33 counties
• 
  Rhododendron occidentale (Torr. & A. Gray) A. Gray var. occidentale Native RHOCO

  western azalea · Ericaceae 33 counties
• 
  Rhododendron occidentale (Torr. & A. Gray) A. Gray var. paludosum Jeps. Native RHOCP

  western azalea · Ericaceae 2 counties
• 
  Rhododendron occidentale (Torr. & A. Gray) A. Gray var. sonomense (Greene) Rehder Native RHOCS

  Sonoma azalea · Ericaceae 2 counties
• 
  Rhus integrifolia (Nutt.) W.H. Brewer & S. Watson Native RHIN2

  lemonade sumac · Anacardiaceae 10 counties
• 
  Rhus ovata S. Watson Native RHOV

  sugar sumac · Anacardiaceae 9 counties
• 
  Rhus trilobata Nutt. Native RHTR

  skunkbush sumac · Anacardiaceae 36 counties
• 
  Rhus trilobata Nutt. var. anisophylla (Greene) Jeps. Native RHTRA

  skunkbush sumac · Anacardiaceae 3 counties
• 
  Rhus trilobata Nutt. var. pilosissima Engelm. Native RHTRP

  pubescent skunkbush sumac · Anacardiaceae 1 county