Link to the WSNWCB Home Page link to the About Us page Link to the Weed Laws page Link to the Noxious Weed List Link to the Weed Information page link to the Frequently Asked Questions page Link to the Education page Connect to other Links page Link to Contact Us page

Region 4 Class B Weed Designates

Region 4 contains all lands lying within the boundaries of Ferry, Stevens, and Pend Oreille counties and all lands lying within the boundaries of Spokane County and north of the Spokane River

Common name Scientific name Designated for control in:
arrowhead, grass-leaved Sagittaria graminea All of Region 4
blackgrass Alopecurus myosuroides Ferry, Stevens, and Pend Oreille counties of Region 4
blueweed Echium vulgare All of Region 4
broom, Scotch Cytisus scoparius All of Region 4
bryony, white Byronia alba All of Region 4
bugloss, common Anchusa officinalis All of Region 4, except for Stevens and Spokane counties
bugloss, annual Anchusa arvensis All of Region 4
camelthorn Alhagi maurorum All of Region 4
carrot, wild Daucus carota Spokane and Ferry counties of Region 4 (except where intentionally cultivated)
catsear, common Hypochaeris radicata All of Region 4
chervil, wild Anthriscus sylvestris All of Region 4
cinquefoil, sulfur Potentilla recta Region 4, except Stevens, Ferry, and Pend Oreille counties
cordgrass, smooth Spartina alterniflora All of Region 4
cordgrass, common Spartina anglica All of Region 4
elodea, Brazilian Egeria densa All of Region 4
fanwort Cabomba caroliniana All of Region 4
fieldcress, Austrian Rorippa austriaca All of Region 4
floating heart, yellow Nymphoides peltata All of Region 4, except the Spokane River between Long Lake Dam and Nine Mile Dam
gorse Ulex europaeus All of Region 4
hawkweed, mouseear Hieracium pilosella All of Region 4
hawkweed, orange Hieracium aurantiacum Ferry County only
hawkweed, polar Hieracium atratum All of Region 4
hawkweed queen-devil Hieracium glomeratum Ferry County only
hawkweed, smooth Hieracium laevigatum All of Region 4
hawkweed, yellow Hieracium caespitosum Region 4 except Stevens and Pend Oreille counties
hedgeparsley Torilis arvensis All of Region 4
helmet, policeman's Impatiens gladulifera All of Region 4
herb-Robert Geranium robertianum All of Region 4
indigobush Amorpha fruticosa All of Region 4
knapweed, black Centaurea nigra All of Region 4
knapweed, brown Centaurea jacea All of Region 4
knapweed, meadow Centaurea jacea x nigra All of Region 4
knapweed, Russian Acroptilon repens Region 4, except that area lying within the boundaries of the Colville Indian Reservation within Ferry County
knapweed, spotted Centaurea biebersteinii Ferry County only
knotweed, Bohemian Polygonum bohemicum Pend Oreille County only
knotweed, giant Polygonum sachalinense Pend Oreille County only
knotweed, Himalayan Polygonum polystachyum Pend Oreille County only
knotweed, Japanese Polygonum cuspidatum Pend Oreille County only
Kochia Kochia scoparia Pend Oreille County only
lepyrodiclis Lepyrodiclis holosteoides All of Region 4
loosestrife, garden Lysimachia vulgaris All of Region 4
loosestrife, purple Lythrum salicaria All of Region 4
loosestrife, wand Lythrum virgatum All of Region 4
nutsedge, yellow Cyperus esculentus All of Region 4
oxtongue, hawkweed Picris hieracioides All of Region 4
parrotfeather Myriophyllum aquaticum All of Region 4
pepperweed, perennial Lepidium latifolium All of Region 4
primrose, water Ludwigia hexapetala All of Region 4
ragwort, tansy Senecio jacobaea All of Region 4
saltcedar Tamarix ramosissima All of Region 4, unless intentionally established prior to 2004
sandbur, longspine Cenchrus longispinus All of Region 4
skeletonweed, rush Chondrilla juncea Stevens County north of Township 33 North of Region 4

Ferry and Pend Oreille counties
sowthistle, perennial Sonchus arvensis ssp. arvensis All of Region 4
spurge, leafy Euphorbia esula All of Region 4
spurge, myrtle Euphorbia myrsinites Pend Oreille County only
starthistle, yellow Centaurea solstitialis Region 4, except those areas within Stevens County bounded by a line beginning at the intersection of State Highway 20 and State Highway 25, then:
  •  north to intersection with Pinkston Creek Road
  • east along Pinkston Creek Road to intersection with Highland Loop Road
  • south along Highland Loop Road to intersection with State Highway 20, then
  • west along State Highway 20 to intersection with State Highway 25
swainsonpea Sphaerophysa salsula All of Region 4
thistle, musk Carduus natans Spokane and Pend Oreille counties
thistle, plumeless Carduus acanthoides Region 4, except those areas within Stevens County lying north of State Highway 20
thistle, Scotch Onopordum acanthium All of Region 4
watermilfoil, Eurasian Myriophyllum spicatum in water bodies of public access, except the Pend Oreille River, in Pend Oreille County

  Return to Top