Class A Noxious Weeds

Class A noxious weeds are non-native species whose distribution in Washington State is still limited. 

• Eradicating existing infestations and preventing new infestations are the highest priorities.

• Eradication of all Class A plants is required by law.

buffalobur Solanum rostratum	common crupina Crupina vulgaris	cordgrass, dense flower Spartina densiflora	cordgrass, salt meadow Spartina patens	dyers woad Isatis tinctoria
eggleaf spurge, Euphorbia oblongata	NEW! floating primrose-willow Ludwigia peploides	garlic mustard Alliaria petiolata	giant hogweed  Heracleum mantegazzianum	goatsrue Galega officinalis
hydrilla Hydrilla verticillata	johnsongrass Sorghum halepense	knapweed, bighead Centaurea macrocephala	knapweed, Vochin Centaurea nigrescens	kudzu Pueraria montana var. lobata
lawnweed Soliva sessilis	meadow clary Salvia pratensis	purple starthistle Centaurea calcitrapa	reed sweetgrass Glyceria maxima	sage, clary Salvia sclarea
sage, Mediterranean Salvia aethiopis	silverleaf nightshade Solanum elaeagnifolium	Spanish broom Spartium junceum	spurge flax Thymelaea passerina	Syrian bean-caper Zygophyllum fabago
NEW! Texas blueweed, Helianthus ciliaris	thistle, Italian Carduus pycnocephalus	thistle, milk Silybum marianum	thistle, slenderflower Carduus tenuiflorus	velvetleaf Abutilon theophrasti
wild four o'clock  Mirabilis nyctaginea	yellow devil hawkweed  Hieracium floribundum

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