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 1,001–1,050 of 4,111.

• 
  Chenopodium atrovirens Rydb. Native CHAT

  pinyon goosefoot · Chenopodiaceae 18 counties
• 
  Chenopodium berlandieri Moq. Native CHBE4

  pitseed goosefoot · Chenopodiaceae 35 counties
• 
  Chenopodium berlandieri Moq. var. zschackii (Murr) Murr ex Asch. Native CHBEZ

  Zschack's goosefoot · Chenopodiaceae 2 counties
• 
  Chenopodium capitatum (L.) Asch. Native CHCA4

  blite goosefoot · Chenopodiaceae 10 counties
• 
  Chenopodium cycloides A. Nelson Native CHCY

  sandhill goosefoot · Chenopodiaceae 6 counties
• 
  Chenopodium desiccatum A. Nelson Native CHDE

  aridland goosefoot · Chenopodiaceae 13 counties
• 
  Chenopodium foliosum (Moench) Asch. Introduced CHFO2

  leafy goosefoot · Chenopodiaceae 21 counties
• 
  Chenopodium fremontii S. Watson Native CHFR3

  Fremont's goosefoot · Chenopodiaceae 25 counties
• 
  Chenopodium fremontii S. Watson var. fremontii Native CHFRF

  Fremont's goosefoot · Chenopodiaceae 24 counties
• 
  Chenopodium glaucum L. Introduced CHGL3

  oakleaf goosefoot · Chenopodiaceae 18 counties
• 
  Chenopodium incanum (S. Watson) A. Heller Native CHIN2

  mealy goosefoot · Chenopodiaceae 17 counties
• 
  Chenopodium incanum (S. Watson) A. Heller var. incanum Native CHINI

  mealy goosefoot · Chenopodiaceae 16 counties
• 
  Chenopodium leptophyllum (Moq.) Nutt. ex S. Watson Native CHLE4

  narrowleaf goosefoot · Chenopodiaceae 18 counties
• 
  Chenopodium polyspermum L. Introduced CHPO

  manyseed goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium polyspermum L. var. acutifolium (Sm.) Gaudich. Introduced CHPOA

  manyseed goosefoot · Chenopodiaceae 1 county
• 
  Chenopodium pratericola Rydb. Native CHPR5

  desert goosefoot · Chenopodiaceae 16 counties
• 
  Chenopodium rubrum L. Native CHRU

  red goosefoot · Chenopodiaceae 8 counties
• 
  Chenopodium simplex (Torr.) Raf. Native CHSI2

  mapleleaf goosefoot · Chenopodiaceae 7 counties
• 
  Chenopodium subglabrum (S. Watson) A. Nelson Native CHSU2

  smooth goosefoot · Chenopodiaceae 8 counties
• 
  Chenopodium watsonii A. Nelson Native CHWA

  Watson's goosefoot · Chenopodiaceae 11 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton Native CHUM

  pipsissewa · Pyrolaceae 12 counties
• 
  Chimaphila umbellata (L.) W.P.C. Barton ssp. occidentalis (Rydb.) Hultén Native CHUMO2

  pipsissewa · Pyrolaceae 12 counties
• 
  Chionophila jamesii Benth. Native CHJA

  Rocky Mountain snowlover · Scrophulariaceae 18 counties
• 
  Chloris verticillata Nutt. Native CHVE2

  tumble windmill grass · Poaceae 14 counties
• 
  Chloris virgata Sw. Native CHVI4

  feather fingergrass · Poaceae 11 counties
• 
  Chorispora tenella (Pall.) DC. Introduced CHTE2

  crossflower · Brassicaceae 24 counties
• 
  Chrysosplenium tetrandrum (Lund ex Malmgr.) Th. Fr. Native CHTE3

  northern golden saxifrage · Saxifragaceae 7 counties
• 
  Chrysothamnus baileyi Wooton & Standl. Native CHBA11

  Bailey's rabbitbrush · Asteraceae 2 counties
• 
  Chrysothamnus depressus Nutt. Native CHDE2

  longflower rabbitbrush · Asteraceae 9 counties
• 
  Chrysothamnus greenei (A. Gray) Greene Native CHGR6

  Greene's rabbitbrush · Asteraceae 6 counties
• 
  Chrysothamnus linifolius Greene Native CHLI3

  spearleaf rabbitbrush · Asteraceae 8 counties
• 
  Chrysothamnus pulchellus (A. Gray) Greene Native CHPU4

  southwestern rabbitbrush · Asteraceae 1 county
• 
  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
• 
  Cichorium intybus L. Introduced CIIN

  chicory · Asteraceae 7 counties
• 
  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 arvense (L.) Scop. Introduced CIAR4

  Canada thistle · Asteraceae 27 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