Class C Weeds
Each species is already widely established in Washington or is of special interest to the state’s agricultural industry. Placement on the state noxious weed list allows counties to enforce control if locally desired. Other counties may choose simply to provide education or technical consultation to county residents.
Canada thistle, a Class C noxious weed, illustrated the desirability of a law that provides local flexibility. This species is widely established in Washington, and most counties prefer to provide technical consultation to landowners on methods of suppression and control. Enforcement of control is the preferred policy, however, in those counties which have crops grown for certified seed.
Washington State Noxious Weed List - Class C Weeds
Common Name | Scientific Name |
---|---|
babysbreath | Gypsophila paniculata |
bindweed, field | Convolvulus arvensis |
Butterfly Bush | Buddleia davidii |
canarygrass, reed | Phalaris arundinacea |
cockle, white | Silene latifolia ssp. alba |
cocklebur, spiny | Xanthium spinosum |
Common Reed (non native genotypes) | Phragmites australis |
cress, hoary | Cardaria draba |
Curly-leaf pondweed | Potamogeton crispus |
dodder, | Cuscuta approximata |
goatgrass, jointed | Aegilops cylindrica |
Groundsel, common | Senecio vulgaris |
hawkweed, spp* | Non-Native hieracium |
henbane, black | Hyoscyamus niger |
iris, yellow flag | Iris pseudocorus |
ivy, English | *4 Cultivars only
|
Knotweed bohemian | Polygonum Bohemicum |
Mayweed, scentless | Matricaria perforata |
old man’s beard | Clematis vitalba |
poison-hemlock | Conium maculatum |
rye, cereal | Secale cereale |
spikeweed | Hemizonia pungens |
St. Johnswort, common | Hypericum perforatum |
tansy, common | Tanacetum vulgare |
thistle, bull | Cirsium vulgare |
thistle, Canada | Cirsium arvense |
toadflax, Yellow | Linaria vulgaris |
Willowherb, hairy | Epilobium hirsutum |
wormwood, absinth | Artemisia absinthium |