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Region 10 Class B Weed Designates

Region 10  contains all lands lying within the boundaries of:

  • Asotin, Garfield, Columbia, and Walla Walla counties
  • Franklin County and east of Highway 395
Common name Scientific name Designated for control in:
alyssum, hoary Berteroa incana All of Region 10
arrowhead, grass-leaved Sagittaria graminea All of Region 10
blackgrass Alopecurus myosuroides All of Region 10
blueweed Echium vulgare All of Region 10
broom, Scotch Cytisus scoparius All of Region 10
bryony, white Byronia alba Franklin County in Region 10
bugloss, common Anchusa officinalis All of Region 10
camelthorn Alhagi maurorum Franklin, Columbia, Garfield and Asotin counties
carrot, wild Daucus carota Region 10, except Walla Walla County (except where intentionally cultivated)
catsear, common Hypochaeris radicata All of Region 10
chervil, wild Anthriscus sylvestris All of Region 10
cinquefoil, sulfur Potentilla recta All of Region 10
cordgrass, smooth Spartina alterniflora All of Region 10
cordgrass, common Spartina anglica All of Region 10
daisy, oxeye Leucanthemum vulgare All of Region 10
elodea, Brazilian Egeria densa All of Region 10
fanwort Cabomba caroliniana All of Region 10
fieldcress, Austrian Rorippa austriaca Region 10, except within the Palouse River Canyon from Big Palouse Falls to the Snake River
floating heart, yellow Nymphoides peltata All of Region 10
gorse Ulex europaeus All of Region 10
hawkweed, mouseear Hieracium pilosella All of Region 10
hawkweed, orange Hieracium aurantiacum All of Region 10
hawkweed, polar Hieracium atratum All of Region 10
hawkweed queen-devil Hieracium glomeratum All of Region 10
hawkweed, smooth Hieracium laevigatum All of Region 10
hawkweed, yellow Hieracium caespitosum All of Region 10
hedgeparsley Torilis arvensis All of Region 10
helmet, policeman's Impatiens gladulifera All of Region 10
herb-Robert Geranium robertianum All of Region 10
indigobush Amorpha fruticosa Region 10, except within 200 feet of the Snake River from Central Ferry downstream

Region 10, except within 200 feet of the Columbia River
knapweed, black Centaurea nigra All of Region 10
knapweed, brown Centaurea jacea All of Region 10
knapweed, diffuse Centaurea diffusa Franklin County of Region 10
knapweed, meadow Centaurea jacea x nigra All of Region 10
knapweed, Russian Acroptilon repens Region 10, except Franklin County
knapweed, spotted Centaurea biebersteinii Region 10, except Garfield County
lepyrodiclis Lepyrodiclis holosteoides All of Region 10
loosestrife, garden Lysimachia vulgaris All of Region 10
loosestrife, purple Lythrum salicaria Region 10, except Walla Walla County
loosestrife, wand Lythrum virgatum Region 10, except Walla Walla County
nutsedge, yellow Cyperus esculentus Region 10, except Walla Walla County
oxtongue, hawkweed Picris hieracioides All of Region 10
parrotfeather Myriophyllum aquaticum All of Region 10
pepperweed, perennial Lepidium latifolium All of Region 10
primrose, water Ludwigia hexapetala All of Region 10
ragwort, tansy Senecio jacobaea All of Region 10
saltcedar Tamarix ramosissima Region 10, except Franklin County (unless intentionally established prior to 2004)
skeletonweed, rush Chondrilla juncea Asotin County

Garfield County south of Highway 12

Columbia County from the Walla Walla County line on Highway 12, and

  • all areas south of Turner Road
  • at Turner Road to the Garfield County line
  • all areas south and east of Turner Road
sowthistle, perennial Sonchus arvensis ssp. arvensis All of Region 10
spurge, leafy Euphorbia esula All of Region 10
starthistle, yellow Centaurea solstitialis All lands lying within Asotin County in Region 10, except:
  • T11N, R44E, Sections 25-29 and 31-35
  • T11N, R45E, Sections 21, 22, 23, and 25
  • T11N, R36E, Sections 19-21, and 28-33
  • T10N, R44E, Sections 1-6, 8-12, 15, and 16
  • T10N, R45E, Sections 23 and 24
  • T10N, R46E, Sections 7, 8, 17-22, 27, 34m and 35
  • T9N, R46E, Sections 1, 2, 12, 13, 23-26, 35, and 36
  • T9N,  R47E, Sections 18, 19, 30, and 31
  • T8N, R46E, Sections 1, 2, 3, 9, 10-16, 23 and 24
  • T8N, R47E, Sections 8, 17-20, 29, 30, 31, and 32
swainsonpea Sphaerophysa salsula Columbia, Garfield, Asotin, and Franklin counties
thistle, musk Carduus natans All of Region 10
thistle, plumeless Carduus acanthoides All of Region 10
thistle, Scotch Onopordum acanthium Franklin County only
toadflax, Damlatian Linaria dalmatica ssp. dalmatica All of Region 10
watermilfoil, Eurasian Myriophyllum spicatum All of Region 10