|
|
|
|
|
|
Noxious Weeds in Snohomish County 2011: Classes and Status
Weed List: Class B
Class B noxious weeds are those noxious weeds not native to the state that are of limited distribution or are unrecorded in a region of the state and that pose a serious threat to that region. Control is required of the following weeds in Snohomish County.
| Common Name |
Scientific Name |
| alyssum, hoary |
Berteroa incana |
Arrowhead, grass leaved
blackgrass |
Sagittaria graminea
Alopecurus myosuroides |
| blueweed |
Echium vulgare |
| bryony, white |
Bryonia alba |
| bugloss, annual |
Anchusa arvensis |
| bugloss, common |
Anchusa officinalis |
| camelthorn |
Alhagi maurorum |
| chervil, wild |
Anthriscus sylvestris |
cinquefoil, sulfur
common reed |
Potentilla recta
Phragmites australis |
|
|
| fanwort |
Cabomba caroliniana |
fieldcress, Austrian
fennel, common |
Rorippa austriaca
Foeniculum vulgare |
|
floating heart, yellow
hairy willow-herb |
Nymphoides peltata
Epilobium hirsutum |
| hawkweed, mouseear |
Hieracium pilosella |
| hawkweed, polar |
Hieracium atratum |
| hawkweed, queen-devil |
Hieracium glomeratum |
| hawkweed, yellow |
Hieracium caespitosum |
| helmet, policeman's |
Impatiens glandulifera |
|
indigobush |
Amorpha fruticosa |
| laurel, spurge |
Daphne laureola |
| knapweed, black |
Centaurea nigra |
| knapweed, brown |
Centaurea jacea |
| knapweed, diffuse |
Centaurea diffusa |
| knapweed, meadow |
Centaurea jacea x nigra |
| knapweed, Russian |
Acroptilon repens |
knapweed, spotted
lawnweed |
Centaurea biebersteinii
Soliva sessilis |
| lepyrodiclis |
Lepyrodiclis holosteoides |
| loosestrife, garden |
Lysimachia vulgaris |
| nutsedge, yellow |
Cyperus esculentus |
| oxtongue, hawkweed |
Picris hieracioides |
| parrotfeather |
Myriophyllum aquaticum |
pepperweed, perennial
poison hemlock |
Lepidium latifolium
Conium maculatum |
| saltcedar |
Tamarix ramosissima |
| sandbur, longspine |
Cenchrus longispinus |
| skeletonweed, rush |
Chondrilla juncea |
| sowthistle, perennial |
Sonchus arvensis ssp. arvensis |
| spurge, leafy |
Euphorbia esula |
| splurge, myrtle |
Euphorbia myrsinites |
| starthistle, yellow |
Centaurea solstitialis |
| swainsonpea |
Sphaerophysa salsula |
| thistle, musk |
Carduus nutans |
| thistle, plumeless |
Carduus acanthoides |
| thistle, Scotch |
Onopordum acanthium |
| toadflax, Dalmation |
Linaria dalmatica ssp. dalmatica |
|
|