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Noxious Weeds - List A
Clear Creek County Noxious Weed Lists - February 5, 2015

All populations of List A species are designated for eradication. List A species must be eradicated in accordance with all the provisions of the applicable state noxious weed management plans. Bold font indicates the species is in Clear Creek County.

List A Weeds: 

African rue (Peganum harmala)
Camelthorn (Alhagi pseudalhagi)
Common crupina (Crupina vulgaris)
Cypress Spurge (Euphorbia cyparissias)
Dyer's woad (Isatis tinctoria)
Elongated mustard (Brassica elongata)
Flowering rush (Butomus umbellatus)
Giant reed (Arundo donax)
Giant salvinia (Salvinia molesta)
Hairy willow-herb (Epilobium hirsutum)
Hydrilla (Hydrilla verticillata)
Knotweed(s):
    Japanese (Polygonum cuspidatum)
    Giant (Polygonum sachalinense)
    Bohemian (Polygonum x bohemicum
Meadow knapweed (Centaurea pratensis)
Mediterranean sage (Salvia aethiopis)
Medusahead (Taeniatherum caput-medusae)
Myrtle Spurge (Euphorbia myrsinites)
Orange Hawkweed (Hieracium aurantiacum)
Parrotfeather (Myriophylum aquaticum)
Purple loosestrife (Lythrum salicaria)
Rush skeletonweed (Chondrilla juncea)
Squarrose knapweed (Centaurea virgata)
Tansy ragwort (Senecio jacobaea)
Yellow starthistle (Centaurea solstitialis)