A. The following weed species, listed in alphabetical order, are identified as State Noxious Weeds. They have been identified by individual counties as problem weeds in the county's area or have been recommended for management through public testimony.
These weed species should be considered by each local advisory board and local governing body in the development, adoption and enforcement of their noxious weed list and noxious weed management plan. The State Noxious Weeds are:
African rue (Peganum harmala)
Black henbane (Hyoscyamus niger)
Black knapweed (Centaurea nigra)
Black nightshade (Solanum nigrum)
Blue mustard (Chorispora tenella)
Bouncingbet (Saponaria officinalis)
Bull thistle (Cirsium vulgare)
Camelthorn (Alhagi pseudalhagi)
Canada thistle (Cirsium arvense)
Chicory (Cichorium intybus)
Chinese clematis (Clematis orientalis)
Coast tarweed (Madia sativa)
Common burdock (Arctium minus)
Common groundsel (Senecio vulgaris)
Common mullein (Verbascum
thapsus)
Common St. Johnswort (Hypericum perforatum)
Common tansy (Tanacetum vulgare)
Common teasel (Dipsacus fullonum)
Cypress spurge (Euphorbia cyparissias)
Dalmatian toadflax (Linaria dalmatica)
Dame's rocket (Hesperis matronalis)
Diffuse knapweed (Centaurea
diffusa)
Downy brome (Bromus tectorum)
Dyer's woad (Isatis tinctoria)
Field bindweed (Convolvulus arvensis)
Flixweed (Descurainia sophia)
Green foxtail (Setaria viridis)
Hairy nightshade (Solanum sarrachoides)
Halogeton (Halogeton glomeratus)
Hoary cress (Cardaria draba)
Houndstongue (Cynoglossum
officinale)
Johnsongrass (Sorghum halepense)
Jointed goatgrass (Aegilops cylindrica)
Kochia (Kochia scoparia)
Leafy spurge (Euphorbia esula)
Longspine sandbur (Cenchrus longispinus)
Mayweed chamomile (Anthemis cotula)
Mediterranean sage (Salvia aethiopis)
Musk thistle (Carduus nutans)
Myrtle spurge (Euphorbia myrsinites)
Oxeye daisy (Chrysanthemum leucanthemum)
Perennial pepperweed (Lepidium latifolium)
Plumeless thistle (Carduus acanthoides)
Poison hemlock (Conium maculatum)
Puncturevine (Tribulus terrestris)
Purple loosestrife (Lythrum salicaria)
Quackgrass (Elytrigia repens)
Redstem filaree (Erodium cicutarium)
Rush skeletonweed (Chondrilla juncea)
Russian knapweed (Centaurea repens)
Russian thistle (Salsola collina)
Russian thistle (Salsola iberica)
Saltcedar (Tamarix parviflora)
Saltcedar (Tamarix ramosissima)
Scentless chamomile (Anthemis arvensis)
Scotch thistle (Onopordum acanthium)
Scotch thistle (Onopordum tauricum)
Spotted knapweed (Centaurea maculosa)
Squarrose knapweed (Centaurea virgata)
Sulfur cinquefoil (Potentilla recta)
Velvetleaf (Abutilon theophrasti)
Wild caraway (Carum carvi)
Wild mustard (Brassica kaber)
Wild proso millet (Panicum miliaceum)
Yellow foxtail (Setaria glauca)
Yellow nutsedge (Cyperus esculentus)
Yellow starthistle (Centaurea solstitialis)
Yellow toadflax (Linaria vulgaris)
B. The following weed species are recognized as the top ten prioritized weed species for the State of Colorado. After analysis of a statewide survey of counties, these species are acknowledged to be the most widespread and to cause the greatest economic impact in the State of Colorado. These species shall be considered by each local advisory board and local governing body in the development, adoption and enforcement of their noxious weed list and noxious weed management plan. They are listed in alphabetical order:
Canada thistle (Cirsium
arvense)
Diffuse knapweed (Centaurea diffusa)
Field bindweed (Convolvulus arvensis)
Hoary cress (Cardaria draba)
Jointed goatgrass (Aegilops cylindrica)
Leafy spurge (Euphorbia esula)
Musk thistle (Carduus nutans)
Russian knapweed (Centaurea repens)
Spotted knapweed (Centaurea maculosa)
Yellow toadflax (Linaria vulgaris)
C. The following weed species may not be present or are not yet widespread or causing great economic impact within the State of Colorado. However, counties and local advisory boards are encouraged to contain and eradicate these species before they proliferate and significantly impact the economic and environmental values of the lands of the State. They are listed in alphabetical order:
African rue (Peganum harmala)
Black knapweed (Centaurea nigra)
Bouncingbet (Saponaria officinalis)
Camelthorn (Alhagi pseudalhagi)
Coast tarweed (Madia sativa)
Common St. Johnswort (Hypericum perforatum)
Common teasel (Dipsacus fullonum)
Cypress spurge (Euphorbia cyparissias)
Dyer's woad (Isatis tinctoria)
Myrtle spurge (Euphorbia myrsinites)
Rush skeletonweed (Chondrilla juncea)
Scentless chamomile (Anthemis arvensis)
Squarrose knapweed (Centaurea virgata)
Sulfur cinquefoil (Potentilla recta)
Yellow starthistle (Centaurea solstitialis)
 |
 |
 |
 |
