Colorado

• Adams 08001
  205 taxa Open ↗
• Alamosa 08003
  652 taxa Open ↗
• Arapahoe 08005
  254 taxa Open ↗
• Archuleta 08007
  651 taxa Open ↗
• Baca 08009
  785 taxa Open ↗
• Bent 08011
  267 taxa Open ↗
• Boulder 08013
  1,961 taxa Open ↗
• Broomfield 08014
  0 taxa Open ↗
• Chaffee 08015
  607 taxa Open ↗
• Cheyenne 08017
  694 taxa Open ↗

Showing 3,301–3,350 of 4,111.

• 
  Ranunculus macounii Britton Native RAMA2

  Macoun's buttercup · Ranunculaceae 32 counties
• 
  Ranunculus pedatifidus Sm. Native RAPE

  surefoot buttercup · Ranunculaceae 10 counties
• 
  Ranunculus pedatifidus Sm. var. affinis (R. Br.) L.D. Benson Native RAPEA

  northern buttercup · Ranunculaceae 10 counties
• 
  Ranunculus pensylvanicus L. f. Native RAPE2

  Pennsylvania buttercup · Ranunculaceae 1 county
• 
  Ranunculus pygmaeus Wahlenb. Native RAPY

  pygmy buttercup · Ranunculaceae 7 counties
• 
  Ranunculus pygmaeus Wahlenb. var. pygmaeus Native RAPYP2

  pygmy buttercup · Ranunculaceae 7 counties
• 
  Ranunculus ranunculinus (Nutt.) Rydb. Native RARA

  tadpole buttercup · Ranunculaceae 6 counties
• 
  Ranunculus repens L. Introduced RARE3

  creeping buttercup · Ranunculaceae 4 counties
• 
  Ranunculus sceleratus L. Native RASC3

  cursed buttercup · Ranunculaceae 29 counties
• 
  Ranunculus sceleratus L. var. multifidus Nutt. Native RASCM

  cursed buttercup · Ranunculaceae 21 counties
• 
  Ranunculus sceleratus L. var. sceleratus Native RASCS

  cursed buttercup · Ranunculaceae 24 counties
• 
  Ranunculus trichophyllus Chaix Native RATR

  threadleaf crowfoot · Ranunculaceae 23 counties
• 
  Ranunculus trichophyllus Chaix var. trichophyllus Native RATRT

  threadleaf crowfoot · Ranunculaceae 23 counties
• 
  Ranunculus uncinatus D. Don ex G. Don Native RAUN

  woodland buttercup · Ranunculaceae 12 counties
• 
  Raphanus raphanistrum L. Introduced RARA2

  wild radish · Brassicaceae 2 counties
• 
  Ratibida columnifera (Nutt.) Wooton & Standl. Native RACO3

  upright prairie coneflower · Asteraceae 30 counties
• 
  Ratibida tagetes (James) Barnhart Native RATA

  green prairie coneflower · Asteraceae 16 counties
• 
  Rayjacksonia annua (Rydb.) R.L. Hartm. & M.A. Lane Native RAAN2

  viscid tansyaster · Asteraceae 9 counties
• 
  Rayjacksonia phyllocephala (DC.) R.L. Hartm. & M.A. Lane Native RAPH2

  camphor daisy · Asteraceae 5 counties
• 
  Redfieldia flexuosa (Thurb.) Vasey Native REFL

  blowout grass · Poaceae 12 counties
• 
  Reseda lutea L. Introduced RELU

  yellow mignonette · Resedaceae 4 counties
• 
  Reverchonia arenaria A. Gray Native REAR

  sand reverchonia · Euphorbiaceae 1 county
• 
  Rhamnus cathartica L. Introduced RHCA3

  common buckthorn · Rhamnaceae 2 counties
• 
  Rhamnus smithii Greene Native RHSM

  Smith's buckthorn · Rhamnaceae 4 counties
• 
  Rheum rhabarbarum L. Introduced RHRH2

  garden rhubarb · Polygonaceae 2 counties
• 
  Rhinanthus minor L. Native RHMI13

  little yellow rattle · Scrophulariaceae 8 counties
• 
  Rhinanthus minor L. ssp. minor Native RHMIM

  little yellow rattle · Scrophulariaceae 8 counties
• 
  Rhodiola integrifolia Raf. Native RHIN11

  ledge stonecrop · Crassulaceae 26 counties
• 
  Rhodiola rhodantha (A. Gray) H. Jacobsen Native RHRH4

  redpod stonecrop · Crassulaceae 30 counties
• 
  Rhododendron albiflorum Hook. Native RHAL2

  Cascade azalea · Ericaceae 3 counties
• 
  Rhododendron albiflorum Hook. var. warrenii (A. Nelson) M.A. Lane Native RHALW

  Cascade azalea · Ericaceae 3 counties
• 
  Rhus aromatica Aiton Native RHAR4

  fragrant sumac · Anacardiaceae 1 county
• 
  Rhus aromatica Aiton var. serotina (Greene) Rehder Native RHARS

  fragrant sumac · Anacardiaceae 1 county
• 
  Rhus glabra L. Native RHGL

  smooth sumac · Anacardiaceae 8 counties
• 
  Rhus trilobata Nutt. Native RHTR

  skunkbush sumac · Anacardiaceae 46 counties
• 
  Rhus trilobata Nutt. var. pilosissima Engelm. Native RHTRP

  pubescent skunkbush sumac · Anacardiaceae 7 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 45 counties
• 
  Rhynchosia senna Gillies ex Hook. Native RHSE4

  Texas snoutbean · Fabaceae 1 county
• 
  Rhynchosia senna Gillies ex Hook. var. texana (Torr. & A. Gray) M.C. Johnst. Native RHSET

  Texas snoutbean · Fabaceae 1 county
• 
  Ribes americanum Mill. Native RIAM2

  American black currant · Grossulariaceae 6 counties
• 
  Ribes aureum Pursh Native RIAU

  golden currant · Grossulariaceae 37 counties
• 
  Ribes aureum Pursh var. aureum Native RIAUA

  golden currant · Grossulariaceae 3 counties
• 
  Ribes aureum Pursh var. villosum DC. Native RIAUV

  golden currant · Grossulariaceae 10 counties
• 
  Ribes cereum Douglas Native RICE

  wax currant · Grossulariaceae 38 counties
• 
  Ribes cereum Douglas var. pedicellare W.H. Brewer & S. Watson Native RICEP

  whisky currant · Grossulariaceae 15 counties
• 
  Ribes inerme Rydb. Native RIIN2

  whitestem gooseberry · Grossulariaceae 37 counties
• 
  Ribes inerme Rydb. var. inerme Native RIINI

  whitestem gooseberry · Grossulariaceae 37 counties
• 
  Ribes lacustre (Pers.) Poir. Native RILA

  prickly currant · Grossulariaceae 11 counties
• 
  Ribes laxiflorum Pursh Native RILA3

  trailing black currant · Grossulariaceae 15 counties