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Home  >  Departments  >  Public Works  >  PW Divisions  >  Road Maintenance  >  Noxious Weeds  >  Class B Weed List

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

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