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 901–950 of 3,643 (native).

• 
  Chrysothamnus vaseyi (A. Gray) Greene Native CHVA2

  Vasey's rabbitbrush · Asteraceae 9 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. Native CHVI8

  yellow rabbitbrush · Asteraceae 24 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. axillaris (D.D. Keck) L.C. Anderson Native CHVIA4

  yellow rabbitbrush · Asteraceae 1 county
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. lanceolatus (Nutt.) H.M. Hall & Clem. Native CHVIL4

  yellow rabbitbrush · Asteraceae 21 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus Native CHVIV2

  yellow rabbitbrush · Asteraceae 8 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus var. stenophyllus (A. Gray) H.M. Hall Native CHVIS5

  yellow rabbitbrush · Asteraceae 3 counties
• 
  Chrysothamnus viscidiflorus (Hook.) Nutt. ssp. viscidiflorus var. viscidiflorus Native CHVIV4

  yellow rabbitbrush · Asteraceae 1 county
• 
  Cicuta maculata L. Native CIMA2

  spotted water hemlock · Apiaceae 23 counties
• 
  Cicuta maculata L. var. maculata Native CIMAM

  spotted water hemlock · Apiaceae 1 county
• 
  Cinna latifolia (Trevis. ex Goepp.) Griseb. Native CILA2

  drooping woodreed · Poaceae 12 counties
• 
  Circaea alpina L. Native CIAL

  small enchanter's nightshade · Onagraceae 5 counties
• 
  Circaea alpina L. ssp. alpina Native CIALA

  small enchanter's nightshade · Onagraceae 4 counties
• 
  Cirsium barnebyi S.L. Welsh & Neese Native CIBA

  Barneby's thistle · Asteraceae 2 counties
• 
  Cirsium calcareum (M.E. Jones) Wooton & Standl. Native CICA10

  Cainville thistle · Asteraceae 8 counties
• 
  Cirsium canescens Nutt. Native CICA11

  prairie thistle · Asteraceae 21 counties
• 
  Cirsium centaureae (Rydb.) K. Schum. Native CICE

  fringed thistle · Asteraceae 13 counties
• 
  Cirsium chuskaense J.W. Moore & Frankton Native CICH3

  monarch thistle · Asteraceae 1 county
• 
  Cirsium eatonii (A. Gray) B.L. Rob. Native CIEA

  Eaton's thistle · Asteraceae 16 counties
• 
  Cirsium flodmanii (Rydb.) Arthur Native CIFL

  Flodman's thistle · Asteraceae 7 counties
• 
  Cirsium neomexicanum A. Gray Native CINE

  New Mexico thistle · Asteraceae 7 counties
• 
  Cirsium ochrocentrum A. Gray Native CIOC2

  yellowspine thistle · Asteraceae 21 counties
• 
  Cirsium ochrocentrum A. Gray ssp. martinii P. Barlow Native CIOCM

  yellowspine thistle · Asteraceae 1 county
• 
  Cirsium ochrocentrum A. Gray ssp. ochrocentrum Native CIOCO2

  yellowspine thistle · Asteraceae 20 counties
• 
  Cirsium ownbeyi S.L. Welsh Native CIOW

  Ownbey's thistle · Asteraceae 1 county
• 
  Cirsium pallidum Wooton & Standl. Native CIPA5

  pale thistle · Asteraceae 1 county
• 
  Cirsium parryi (A. Gray) Petr. Native CIPA

  Parry's thistle · Asteraceae 17 counties
• 
  Cirsium parryi (A. Gray) Petr. ssp. parryi Native CIPAP2

  Parry's thistle · Asteraceae 17 counties
• 
  Cirsium perplexans (Rydb.) Petr. Native CIPE5

  Rocky Mountain thistle · Asteraceae 4 counties
• ⚘
  Cirsium scapanolepis Petr. Native CISC

  mountain slope thistle · Asteraceae 2 counties
• 
  Cirsium scariosum Nutt. Native CISC2

  meadow thistle · Asteraceae 17 counties
• 
  Cirsium scopulorum (Greene) Cockerell ex Daniels Native CISC3

  mountain thistle · Asteraceae 17 counties
• 
  Cirsium undulatum (Nutt.) Spreng. Native CIUN

  wavyleaf thistle · Asteraceae 31 counties
• 
  Cirsium undulatum (Nutt.) Spreng. var. tracyi (Rydb.) S.L. Welsh Native CIUNT

  Tracy's thistle · Asteraceae 13 counties
• 
  Cirsium undulatum (Nutt.) Spreng. var. undulatum Native CIUNU

  wavyleaf thistle · Asteraceae 2 counties
• 
  Cirsium wheeleri (A. Gray) Petr. Native CIWH

  Wheeler's thistle · Asteraceae 1 county
• 
  Claytonia lanceolata Pall. ex Pursh Native CLLA2

  lanceleaf springbeauty · Portulacaceae 16 counties
• 
  Claytonia megarhiza (A. Gray) Parry ex S. Watson Native CLME

  alpine springbeauty · Portulacaceae 23 counties
• 
  Claytonia megarhiza (A. Gray) Parry ex S. Watson var. megarhiza Native CLMEM

  alpine springbeauty · Portulacaceae 23 counties
• 
  Claytonia rosea Rydb. Native CLRO5

  western springbeauty · Portulacaceae 7 counties
• 
  Claytonia rubra (Howell) Tidestr. Native CLRU2

  redstem springbeauty · Portulacaceae 2 counties
• 
  Clematis columbiana (Nutt.) Torr. & A. Gray Native CLCO2

  rock clematis · Ranunculaceae 22 counties
• 
  Clematis columbiana (Nutt.) Torr. & A. Gray var. columbiana Native CLCOC2

  rock clematis · Ranunculaceae 22 counties
• 
  Clematis hirsutissima Pursh Native CLHI

  hairy clematis · Ranunculaceae 31 counties
• 
  Clematis hirsutissima Pursh var. hirsutissima Native CLHIH

  hairy clematis · Ranunculaceae 22 counties
• 
  Clematis hirsutissima Pursh var. scottii (Porter) Erickson Native CLHIS

  Scott's clematis · Ranunculaceae 12 counties
• 
  Clematis ligusticifolia Nutt. Native CLLI2

  western white clematis · Ranunculaceae 31 counties
• 
  Clematis ligusticifolia Nutt. var. ligusticifolia Native CLLIL2

  western white clematis · Ranunculaceae 31 counties
• 
  Clematis occidentalis (Hornem.) DC. Native CLOC2

  western blue virginsbower · Ranunculaceae 5 counties
• 
  Clematis occidentalis (Hornem.) DC. var. grosseserrata (Rydb.) J. Pringle Native CLOCG

  western blue virginsbower · Ranunculaceae 5 counties
• 
  Cleome lutea Hook. Native CLLU2

  yellow spiderflower · Capparaceae 5 counties