State of Colorado A List


African rue
Common crupina
Cypress spurge
Dyers woad
Elongated mustard
Flowering rush
Giant reed
Giant salvinia
Hairy willow-herb
Japanese/Giant/Bohemian knotweed
Meadow knapweed
Mediterranean sage
Myrtle spurge 
Orange hawkweed
Purple loosestrife
Rush skeletonweed
Squarrose knapwwed
Tansy ragwort
Yellow starthistle



The state of Colorado requires eradication of all “A list” species from the state noxious weed list. These are 23 species that are not yet found in Colorado or are found only in small populations. Please report any findings of these species to Yuma County Pest Control District.

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