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 1–50 of 4,111.

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  Abies concolor (Gord. & Glend.) Lindl. ex Hildebr. Native ABCO

  white fir · Pinaceae 13 counties
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  Abies lasiocarpa (Hook.) Nutt. Native ABLA

  subalpine fir · Pinaceae 21 counties
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  Abies lasiocarpa (Hook.) Nutt. var. arizonica (Merriam) Lemmon Native ABLAA

  corkbark fir · Pinaceae 6 counties
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  Abies lasiocarpa (Hook.) Nutt. var. lasiocarpa Native ABLAL

  subalpine fir · Pinaceae 17 counties
• 
  Abronia argillosa S.L. Welsh & Goodrich Native ABAR

  clay sand verbena · Nyctaginaceae 2 counties
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  Abronia bolackii N.D. Atwood, S.L. Welsh & K.D. Heil Native ABBO

  Bolack's sand verbena · Nyctaginaceae 1 county
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  Abronia carletonii J.M. Coult. & Fisher Native ABCA

  Carleton's sand verbena · Nyctaginaceae 3 counties
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  Abronia elliptica A. Nelson Native ABEL

  fragrant white sand verbena · Nyctaginaceae 10 counties
• 
  Abronia fragrans Nutt. ex Hook. Native ABFR2

  snowball sand verbena · Nyctaginaceae 29 counties
• 
  Abronia nana S. Watson Native ABNA

  dwarf sand verbena · Nyctaginaceae 3 counties
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  Abronia nana S. Watson var. harrisii S.L. Welsh Native ABNAH

  Harris' dwarf sand verbena · Nyctaginaceae 1 county
• 
  Abronia nana S. Watson var. nana Native ABNAN

  dwarf sand verbena · Nyctaginaceae 2 counties
• 
  Abutilon incanum (Link) Sweet Native ABIN

  pelotazo · Malvaceae 1 county
• 
  Abutilon parvulum A. Gray Native ABPA3

  dwarf Indian mallow · Malvaceae 1 county
• 
  Abutilon theophrasti Medik. Introduced ABTH

  velvetleaf · Malvaceae 2 counties
• 
  Acer glabrum Torr. Native ACGL

  Rocky Mountain maple · Aceraceae 35 counties
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  Acer glabrum Torr. var. glabrum Native ACGLG2

  Rocky Mountain maple · Aceraceae 1 county
• 
  Acer grandidentatum Nutt. Native ACGR3

  bigtooth maple · Aceraceae 1 county
• 
  Acer grandidentatum Nutt. var. grandidentatum Native ACGRG

  bigtooth maple · Aceraceae 1 county
• 
  Acer negundo L. Native ACNE2

  boxelder · Aceraceae 21 counties
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  Acer negundo L. var. interius (Britton) Sarg. Native ACNEI2

  boxelder · Aceraceae 15 counties
• 
  Acer negundo L. var. negundo Native ACNEN

  boxelder · Aceraceae 18 counties
• 
  Achillea millefolium L. Both ACMI2

  common yarrow · Asteraceae 41 counties
• 
  Achillea millefolium L. var. alpicola (Rydb.) Garrett Native ACMIA

  common yarrow · Asteraceae 1 county
• 
  Achillea millefolium L. var. occidentalis DC. Native ACMIO

  western yarrow · Asteraceae 41 counties
• 
  Achnatherum aridum (M.E. Jones) Barkworth Native ACAR14

  Mormon needlegrass · Poaceae 2 counties
• 
  Achnatherum hymenoides (Roem. & Schult.) Barkworth Native ACHY

  Indian ricegrass · Poaceae 51 counties
• 
  Achnatherum lettermanii (Vasey) Barkworth Native ACLE9

  Letterman's needlegrass · Poaceae 18 counties
• 
  Achnatherum nelsonii (Scribn.) Barkworth Native ACNE9

  Columbia needlegrass · Poaceae 29 counties
• 
  Achnatherum nelsonii (Scribn.) Barkworth ssp. nelsonii Native ACNEN2

  Columbia needlegrass · Poaceae 23 counties
• 
  Achnatherum pinetorum (M.E. Jones) Barkworth Native ACPI2

  pine needlegrass · Poaceae 2 counties
• 
  Achnatherum richardsonii (Link) Barkworth Native ACRI8

  Richardson's needlegrass · Poaceae 4 counties
• 
  Achnatherum robustum (Vasey) Barkworth Native ACRO7

  sleepygrass · Poaceae 11 counties
• 
  Achnatherum scribneri (Vasey) Barkworth Native ACSC11

  Scribner needlegrass · Poaceae 8 counties
• 
  Achnatherum speciosum (Trin. & Rupr.) Barkworth Native ACSP12

  desert needlegrass · Poaceae 2 counties
• ⚘
  Achnatherum ×bloomeri (Bol.) Barkworth [hymenoides × occidentale] Native ACBL

  Poaceae 4 counties
• 
  Aconitum columbianum Nutt. Native ACCO4

  Columbian monkshood · Ranunculaceae 29 counties
• 
  Aconitum columbianum Nutt. ssp. columbianum Native ACCOC3

  Columbian monkshood · Ranunculaceae 29 counties
• 
  Acorus calamus L. Introduced ACCA4

  calamus · Acoraceae 2 counties
• 
  Acroptilon repens (L.) DC. Introduced ACRE3

  hardheads · Asteraceae 18 counties
• 
  Actaea rubra (Aiton) Willd. Native ACRU2

  red baneberry · Ranunculaceae 29 counties
• 
  Actaea rubra (Aiton) Willd. ssp. arguta (Nutt.) Hultén Native ACRUA8

  red baneberry · Ranunculaceae 29 counties
• 
  Adiantum aleuticum (Rupr.) Paris Native ADAL

  Aleutian maidenhair · Pteridaceae 1 county
• 
  Adiantum capillus-veneris L. Native ADCA

  common maidenhair · Pteridaceae 3 counties
• 
  Adoxa moschatellina L. Native ADMO

  muskroot · Adoxaceae 17 counties
• 
  Aegilops cylindrica Host Introduced AECY

  jointed goatgrass · Poaceae 15 counties
• 
  Agalinis tenuifolia (Vahl) Raf. Native AGTE3

  slenderleaf false foxglove · Scrophulariaceae 7 counties
• 
  Agalinis tenuifolia (Vahl) Raf. var. parviflora (Nutt.) Pennell Native AGTEP2

  slenderleaf false foxglove · Scrophulariaceae 6 counties
• 
  Agastache foeniculum (Pursh) Kuntze Native AGFO

  blue giant hyssop · Lamiaceae 2 counties
• 
  Agastache pallidiflora (A. Heller) Rydb. Native AGPA

  Bill Williams Mountain giant hyssop · Lamiaceae 6 counties