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Region 8 Class B Weed Designates

Region 8 contains all lands lying within the boundaries of Pacific, Lewis, Wahkiakum, Cowlitz, Skamania, and Clark counties.

Common name Scientific name Designated for control in:
alyssum, hoary Berteroa incana All of Region 8
arrowhead, grass-leaved Sagittaria graminea All of Region 8
blackgrass Alopecurus myosuroides All of Region 8
blueweed Echium vulgare All of Region 8
bryony, white Byronia alba All of Region 8
bugloss, common Anchusa officinalis All of Region 8
bugloss, annual Anchusa arvensis All of Region 8
camelthorn Alhagi maurorum All of Region 8
chervil, wild Anthriscus sylvestris Region 8, except Clark County
cinquefoil, sulfur Potentilla recta Region 8, except Lewis County
cordgrass, smooth Spartina alterniflora Region 8, except bays and estuaries of Pacific County
cordgrass, common Spartina anglica All of Region 8
elodea, Brazilian Egeria densa Lewis County, only
fanwort Cabomba caroliniana Region 8, except T8N, R3W of Cowlitz County
fieldcress, Austrian Rorippa austriaca All of Region 8
floating heart, yellow Nymphoides peltata All of Region 8
gorse Ulex europaeus Region 8, except Pacific County
hawkweed, mouseear Hieracium pilosella All of Region 8
hawkweed, orange Hieracium aurantiacum Lewis County only
hawkweed, polar Hieracium atratum All of Region 8
hawkweed queen-devil Hieracium glomeratum All of Region 8
hawkweed, smooth Hieracium laevigatum All of Region 8
hawkweed, yellow Hieracium caespitosum All of Region 8
hedgeparsley Torilis arvensis All of Region 8
helmet, policeman's Impatiens gladulifera All of Region 8
indigobush Amorpha fruticosa All of Region 8, except within 200 feet of the Columbia River
knapweed, black Centaurea nigra Region 8, except Clark County
knapweed, brown Centaurea jacea Region 8, except Clark County
knapweed, diffuse Centaurea diffusa All of Region 8
knapweed, meadow Centaurea jacea x nigra Region 8, except Clark County
knapweed, Russian Acroptilon repens All of Region 8
knapweed, spotted Centaurea biebersteinii Region 8, except that portion of Lewis County below the ordinary high watermark of the Tilton River from Hwy. 508 to Lake Mayfield
Himalayan knotweed Polygonum polystachyum Lewis County only
Kochia Kochia scoparia All of Region 8
lepyrodiclis Lepyrodiclis holosteoides All of Region 8
loosestrife, garden Lysimachia vulgaris All of Region 8
loosestrife, purple Lythrum salicaria All of Region 8
loosestrife, wand Lythrum virgatum All of Region 8
nutsedge, yellow Cyperus esculentus All of Region 8
oxtongue, hawkweed Picris hieracioides Region 8, except Skamania County
parrotfeather Myriophyllum aquaticum Pacific, Lewis, and Skamania counties 
pepperweed, perennial Lepidium latifolium All of Region 8
primrose, water Ludwigia hexapetala Region 8, except T8N, R3W, S14 of Cowlitz County
saltcedar Tamarix ramosissima All of Region 8, unless intentionally established prior to 2004
sandbur, longspine Cenchrus longispinus All of Region 8
skeletonweed, rush Chondrilla juncea All of Region 8
sowthistle, perennial Sonchus arvensis ssp. arvensis All of Region 8
spurge, leafy Euphorbia esula All of Region 8
starthistle, yellow Centaurea solstitialis All of Region 8
swainsonpea Sphaerophysa salsula All of Region 8
thistle, musk Carduus natans All of Region 8
thistle, plumeless Carduus acanthoides All of Region 8
thistle, Scotch Onopordum acanthium All of Region 8
toadflax, Damlatian Linaria dalmatica ssp. dalmatica All of Region 8
watermilfoil, Eurasian Myriophyllum spicatum Region 8, except within 200 feet of the Columbia River

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