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 8,251–8,300 of 9,954.

• 
  Ranunculus arvensis L. Introduced RAAR3

  corn buttercup · Ranunculaceae 13 counties
• 
  Ranunculus bonariensis Poir. Native RABO

  Carter's buttercup · Ranunculaceae 9 counties
• 
  Ranunculus bonariensis Poir. var. trisepalus (Gillies ex Hook. & Arn.) Lourteig Native RABOT

  Carter's buttercup · Ranunculaceae 9 counties
• 
  Ranunculus bulbosus L. Introduced RABU

  St. Anthony's turnip · Ranunculaceae 1 county
• 
  Ranunculus californicus Benth. Native RACA2

  California buttercup · Ranunculaceae 43 counties
• 
  Ranunculus canus Benth. Native RACA3

  Sacramento Valley buttercup · Ranunculaceae 26 counties
• 
  Ranunculus cortusifolius Willd. Introduced RACO21

  Azores buttercup · Ranunculaceae 1 county
• 
  Ranunculus cymbalaria Pursh Native RACY

  alkali buttercup · Ranunculaceae 22 counties
• 
  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 muricatus L. Introduced RAMU2

  spinyfruit buttercup · Ranunculaceae 32 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 parviflorus L. Introduced RAPA3

  smallflower buttercup · Ranunculaceae 5 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 repens L. Introduced RARE3

  creeping buttercup · Ranunculaceae 19 counties
• 
  Ranunculus sardous Crantz Introduced RASA

  hairy buttercup · Ranunculaceae 6 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
• 
  Raphanus raphanistrum L. Introduced RARA2

  wild radish · Brassicaceae 27 counties
• ⚘
  Raphanus sativus L. Introduced RASA2

  cultivated radish · Brassicaceae 39 counties
• 
  Rapistrum rugosum (L.) All. Introduced RARU

  annual bastardcabbage · Brassicaceae 3 counties
• 
  Ratibida columnifera (Nutt.) Wooton & Standl. Native RACO3

  upright prairie coneflower · Asteraceae 4 counties
• 
  Reseda alba L. Introduced REAL

  white upright mignonette · Resedaceae 7 counties
• 
  Reseda lutea L. Introduced RELU

  yellow mignonette · Resedaceae 2 counties
• 
  Reseda luteola L. Introduced RELU2

  weld · Resedaceae 8 counties