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 101–150 of 434 (introduced).

• 
  Cardaria draba (L.) Desv. Introduced CADR

  whitetop · Brassicaceae 15 counties
• 
  Cardaria pubescens (C.A. Mey.) Jarmolenko Introduced CAPU6

  hairy whitetop · Brassicaceae 8 counties
• 
  Carduus acanthoides L. Introduced CAAC

  spiny plumeless thistle · Asteraceae 3 counties
• 
  Carduus nutans L. Introduced CANU4

  nodding plumeless thistle · Asteraceae 15 counties
• 
  Carum carvi L. Introduced CACA19

  caraway · Apiaceae 10 counties
• ⚘
  Caryopteris ×clandonensis hort. ex Rehder [incana × mongholica] Introduced CACL7

  caryopteris · Verbenaceae 1 county
• 
  Centaurea cyanus L. Introduced CECY2

  garden cornflower · Asteraceae 2 counties
• 
  Centaurea diffusa Lam. Introduced CEDI3

  diffuse knapweed · Asteraceae 8 counties
• 
  Centaurea eriophora L. Introduced CEER

  wild sandheath · Asteraceae 1 county
• 
  Centaurea solstitialis L. Introduced CESO3

  yellow star-thistle · Asteraceae 3 counties
• 
  Centaurea stoebe L. Introduced CEST8

  spotted knapweed · Asteraceae 7 counties
• 
  Centaurea stoebe L. ssp. micranthos (Gugler) Hayek Introduced CESTM

  spotted knapweed · Asteraceae 7 counties
• 
  Centaurium pulchellum (Sw.) Druce Introduced CEPU3

  branched centaury · Gentianaceae 1 county
• 
  Cerastium fontanum Baumg. Introduced CEFO2

  common mouse-ear chickweed · Caryophyllaceae 15 counties
• 
  Cerastium fontanum Baumg. ssp. vulgare (Hartm.) Greuter & Burdet Introduced CEFOV2

  big chickweed · Caryophyllaceae 15 counties
• 
  Ceratocephala testiculata (Crantz) Roth Introduced CETE5

  curveseed butterwort · Ranunculaceae 13 counties
• 
  Chaenorhinum minus (L.) Lange Introduced CHMI

  dwarf snapdragon · Scrophulariaceae 1 county
• 
  Chenopodium foliosum (Moench) Asch. Introduced CHFO2

  leafy goosefoot · Chenopodiaceae 21 counties
• 
  Chenopodium glaucum L. Introduced CHGL3

  oakleaf 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
• 
  Chorispora tenella (Pall.) DC. Introduced CHTE2

  crossflower · Brassicaceae 24 counties
• 
  Cichorium intybus L. Introduced CIIN

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

  Canada thistle · Asteraceae 27 counties
• 
  Cirsium vulgare (Savi) Ten. Introduced CIVU

  bull thistle · Asteraceae 9 counties
• 
  Clematis orientalis L. Introduced CLOR

  Oriental virginsbower · Ranunculaceae 5 counties
• 
  Colutea arborescens L. Introduced COAR6

  bladder senna · Fabaceae 3 counties
• 
  Conium maculatum L. Introduced COMA2

  poison hemlock · Apiaceae 16 counties
• 
  Conringia orientalis (L.) Dumort. Introduced COOR

  hare's ear mustard · Brassicaceae 14 counties
• 
  Convolvulus arvensis L. Introduced COAR4

  field bindweed · Convolvulaceae 29 counties
• 
  Conyza bonariensis (L.) Cronquist Introduced COBO

  asthmaweed · Asteraceae 1 county
• 
  Cotoneaster lucidus Schltdl. Introduced COLU5

  shiny cotoneaster · Rosaceae 4 counties
• 
  Crepis capillaris (L.) Wallr. Introduced CRCA3

  smooth hawksbeard · Asteraceae 2 counties
• 
  Crypsis alopecuroides (Piller & Mitterp.) Schrad. Introduced CRAL2

  foxtail pricklegrass · Poaceae 1 county
• 
  Cucurbita pepo L. var. pepo Introduced CUPEP

  field pumpkin · Cucurbitaceae 1 county
• 
  Cuscuta approximata Bab. Introduced CUAP2

  alfalfa dodder · Cuscutaceae 3 counties
• 
  Cynodon dactylon (L.) Pers. Introduced CYDA

  Bermudagrass · Poaceae 3 counties
• 
  Cynoglossum officinale L. Introduced CYOF

  gypsyflower · Boraginaceae 21 counties
• 
  Cyperus esculentus L. var. leptostachyus Boeckeler Introduced CYESL

  yellow nutsedge · Cyperaceae 2 counties
• 
  Dactylis glomerata L. Introduced DAGL

  orchardgrass · Poaceae 26 counties
• 
  Dactylis glomerata L. ssp. glomerata Introduced DAGLG

  orchardgrass · Poaceae 26 counties
• 
  Daucus carota L. Introduced DACA6

  Queen Anne's lace · Apiaceae 4 counties
• 
  Descurainia sophia (L.) Webb ex Prantl Introduced DESO2

  herb sophia · Brassicaceae 40 counties
• 
  Dianthus armeria L. Introduced DIAR

  Deptford pink · Caryophyllaceae 5 counties
• 
  Dianthus deltoides L. Introduced DIDE

  maiden pink · Caryophyllaceae 2 counties
• 
  Digitalis purpurea L. Introduced DIPU

  purple foxglove · Scrophulariaceae 2 counties
• 
  Digitalis purpurea L. ssp. purpurea Introduced DIPUP2

  purple foxglove · Scrophulariaceae 2 counties
• 
  Digitaria ischaemum (Schreb.) Schreb. ex Muhl. Introduced DIIS

  smooth crabgrass · Poaceae 3 counties
• 
  Digitaria sanguinalis (L.) Scop. Introduced DISA

  hairy crabgrass · Poaceae 6 counties
• 
  Dipsacus fullonum L. Introduced DIFU2

  Fuller's teasel · Dipsacaceae 4 counties