8 Colo. Code Regs. § 1203-5, pt. 9.0
The following plant species shall not be sold as nursery stock within the State of Colorado or contaminate nursery stock as evidenced by plants or plant parts visible above the ground in nursery stock prepared for sale within the State of Colorado:
ORNAMENTAL VARIETIES
Bouncingbet (Saponaria officinalis)
Chinese clematis (Clematis orientalis)
Common St. Johnswort (Hypericum perforatum)
Common tansy (Tanacetum vulgare)
Cypress spurge (Euphorbia cyparissias)
Dame's rocket (Hesperis matronalis)
Giant salvinia (Salvinia molesta)
Hydrilla (Hydrilla verticillata)
Myrtle spurge (Euphorbia myrsinites)
Orange hawkweed (Hieracium aurantiacum)
Oxeye daisy (Chrysanthemum leucanthemum)
Purple loosestrife (Lythrum salicaria and L. virgatum)
Russian-olive (Elaeagnus angustifolia)
Saltcedar (Tamarix parviflora and T. ramosissima)
Scentless chamomile (Matricaria perforata)
Yellow toadflax (Linaria vulgaris)
OTHER VARIETIES
Absinth wormwood (Artemisia absinthium)
African rue (Peganum harmala)
Bohemiam knotweed (Polygonum x bohemicum)
Bulbous bluegrass (Poa bulbosa)
Black henbane (Hyoscyamus niger)
Black henbane (Hyoscyamus niger)
Bull thistle (Cirsium vulgare)
Camelthorn (Alhagi pseudalhagi)
Canada thistle (Cirsium arvense)
Chicory (Cichorium intybus)
Common burdock (Arctium minus)
Common crupina (Crupina vulgaris)
Common mullein (Verbascum thapsus)
Common teasel (Dipsacus fullonum)
Corn Chamomile (Anthemis Arvensis)
Cutleaf Teasel (Dipsacus Laciniatus)
Dalmatian toadflax, broad-leaved (Linaria dalmatica)
Dalmatian toadflax, narrow-leaved (L. genistifolia)
Diffuse knapweed (Centaurea diffusa)
Downy brome (Bromus tectorum)
Dyer's woad (Isatis tinctoria)
Elongated mustard (brassica elongata)
Eurasian watermilfoil (Myriophyllum spicatum)
Field bindweed (Convolvulus arvensis)
Giant knotweed (polygonum sachalinense)
Giant reed (Arundo donax)
Halogeton (Halogeton glomeratus)
Hoary cress (Cardaria draba)
Houndstongue (Cynoglossum officinale)
Japanese knotweed (Polygonum cuspidatum)
Johnsongrass (Sorghum halepense)
Jointed goatgrass (Aegilops cylindrica)
Leafy spurge (Euphorbia esula)
Mayweed chamomile (Anthemis cotula)
Meadow knapweed (Centaurea pratensis)
Mediterranean sage (Salvia aethiopis)
Medusahead (Taeniatherum caput-medusae)
Moth mullein (Verbascum blattaria)
Musk thistle (Carduus nutans)
Perennial pepperweed (Lepidium latifolium)
Perennial sowthistle (Sonchus arvensis)
Plumeless thistle (Carduus acanthoides)
Poison hemlock (Conium maculatum)
Puncturevine (Tribulus terrestris)
Quackgrass (Elytrigia repens)
Redstem filaree (Erodium cicutarium)
Rush skeletonweed (Chondrilla juncea)
Russian knapweed (Acroptilon repens)
Scotch thistle (Onopordum acanthium and O. tauricum)
Sericea lespedeza (Lespedeza cuneata)
Spotted knapweed (Centaurea maculosa)
Spurred anoda (Anoda cristata)
Squarrose knapweed (Centaurea virgata)
Sulfur cinquefoil (Potentilla recta)
Tansy ragwort (Senecio jacobaea)
Velvetleaf (Abutilon theophrasti)
Venice mallow (hibiscus trionum)
Wild caraway (Carum carvi)
Wild proso millet (Panicum miliaceum)
Yellow nutsedge (Cyperus esculentus)
Yellow starthistle (Centaurea solstitialis)
8 CCR 1203-5, pt. 9.0