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 8,301–8,350 of 9,954.

• 
  Reseda odorata L. Introduced REOD

  garden mignonette · Resedaceae 2 counties
• 
  Retama monosperma (L.) Boiss. Introduced REMO2

  bridal broom · Fabaceae 1 county
• 
  Rhagadiolus stellatus (L.) Gaertn. Introduced RHST3

  endive daisy · Asteraceae 2 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
• 
  Rhodanthe chlorocephala (Turcz.) P. Wilson Introduced RHCH13

  rosy sunray · Asteraceae 1 county
• 
  Rhodanthe chlorocephala (Turcz.) P. Wilson ssp. rosea (Hook.) P. Wilson Introduced RHCHR

  rosy sunray · Asteraceae 1 county
• 
  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 lancea L. f. Introduced RHLA11

  African sumac · Anacardiaceae 2 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
• 
  Rhus trilobata Nutt. var. quinata (Greene) Jeps. Native RHTRQ

  skunkbush sumac · Anacardiaceae 3 counties
• 
  Rhus trilobata Nutt. var. simplicifolia (Greene) F.A. Barkley Native RHTRS

  skunkbush sumac · Anacardiaceae 1 county
• 
  Rhus trilobata Nutt. var. trilobata Native RHTRT

  skunkbush sumac · Anacardiaceae 1 county
• 
  Rhynchospora alba (L.) Vahl Native RHAL3

  white beaksedge · Cyperaceae 9 counties
• 
  Rhynchospora californica Gale Native RHCA10

  California beaksedge · Cyperaceae 4 counties
• 
  Rhynchospora capitellata (Michx.) Vahl Native RHCA12

  brownish beaksedge · Cyperaceae 8 counties
• 
  Rhynchospora globularis (Chapm.) Small Native RHGL2

  globe beaksedge · Cyperaceae 1 county
• 
  Rhynchospora globularis (Chapm.) Small var. globularis Native RHGLG

  globe beaksedge · Cyperaceae 1 county
• 
  Rhynchospora recognita (Gale) Kral Native RHRE8

  globe beaksedge · Cyperaceae 1 county
• 
  Ribes amarum McClatchie Native RIAM

  bitter gooseberry · Grossulariaceae 15 counties
• 
  Ribes aureum Pursh Native RIAU

  golden currant · Grossulariaceae 21 counties
• 
  Ribes aureum Pursh var. aureum Native RIAUA

  golden currant · Grossulariaceae 6 counties
• 
  Ribes aureum Pursh var. gracillimum (Coville & Britton) Jeps. Native RIAUG

  golden currant · Grossulariaceae 11 counties
• 
  Ribes binominatum A. Heller Native RIBI

  ground gooseberry · Grossulariaceae 9 counties
• 
  Ribes bracteosum Douglas ex Hook. Native RIBR

  stink currant · Grossulariaceae 3 counties
• 
  Ribes californicum Hook. & Arn. Native RICA

  hillside gooseberry · Grossulariaceae 21 counties
• 
  Ribes californicum Hook. & Arn. var. californicum Native RICAC

  hillside gooseberry · Grossulariaceae 19 counties
• 
  Ribes californicum Hook. & Arn. var. hesperium (McClatchie) Jeps. Native RICAH

  hillside gooseberry · Grossulariaceae 6 counties
• 
  Ribes canthariforme Wiggins Native RICA2

  Moreno currant · Grossulariaceae 1 county
• 
  Ribes cereum Douglas Native RICE

  wax currant · Grossulariaceae 29 counties
• 
  Ribes cereum Douglas var. cereum Native RICEC2

  wax currant · Grossulariaceae 10 counties
• 
  Ribes cereum Douglas var. pedicellare W.H. Brewer & S. Watson Native RICEP

  whisky currant · Grossulariaceae 5 counties
• ⚘
  Ribes cruentum Greene Native RICR

  shinyleaf currant · Grossulariaceae 11 counties
• ⚘
  Ribes cruentum Greene var. cruentum Native RICRC

  shinyleaf currant · Grossulariaceae 11 counties
• 
  Ribes divaricatum Douglas Native RIDI

  spreading gooseberry · Grossulariaceae 20 counties
• 
  Ribes divaricatum Douglas var. parishii (A. Heller) Jeps. Native RIDIP

  Parish's gooseberry · Grossulariaceae 2 counties