Class "B" Noxious Weeds

Non-native species presently limited to portions of Washington state. Species are designated for control in regions where they are not yet widespread. Preventing new infestations in these areas is a high priority. 


Class "B" plants are designated for control in locations where not yet widespread.


Class "B" noxious weeds found in Benton County are shown below.  If you click on the image a larger image will be displayed. If you click on "*details*" the link will take you to the Washington State Noxious Weed Control Board website's description of the plant.

camelthorn, Alhagi maurorum details

common reed, Phragmites australis details

Dalmatian toadflax, Linaria dalmatica ssp. dalmatica details

Eurasian watermilfoil, Myriophyllum spicatum details

hairy willow-herb, Epilobium hirsutum details

houndstongue, Cynoglossum officinale details

indigobush, Amorpha fruticosa  *details*

indigobush, Amorpha fruticosa details

diffuse knapweed, Centaurea diffusa  *details*

diffuse knapweed, Centaurea diffusa details

Russian knapweed, Acroptilon repens details

spotted knapweed, Centaurea stoebe  *details*

spotted knapweed, Centaurea stoebe details

Bohemian knotweed, Polygonum x bohemicum details

Japanese knotweed, Polygonum cuspidatum  *details*

Japanese knotweed, Polygonum cuspidatum details

kochia, Kochia scoparia details

purple loosestrife, Lythrum salicaria details

perennial pepperweed, Lepidium latifolium details

poison hemlock, Conium maculatum details

puncturevine, Tribulus terrestris details

rush skeletonweed, Chondrilla juncea details

saltcedar,  Tamarix ramosissima    *details*

saltcedar, Tamarix ramosissima  *details*

saltcedar, Tamarix ramosissima details

myrtle spurge, Euphorbia myrsinites  *details*

myrtle spurge, Euphorbia myrsinites details

musk thistle, Carduus nutans  *details*

musk thistle, Carduus nutans details

Scotch thistle, Onopordum acanthium details

velvetleaf, Abutilon theophrasti details

white bryony, Bryonia alba details

yellow nutsedge, Cyperus esculentus details

yellow starthistle, Centaurea solstitialis details

Ravenna Grass, Saccharum ravennae details