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Region 1 Class B Weed Designates
Region 1 contains all lands lying within the boundaries of Clallam and Jefferson
Counties.
| Common name |
Scientific name |
Designated for control in: |
| Austrian fieldcress |
Rorippa austriaca |
All of Region 1 |
| Annual
bugloss |
Anchusa arvensis |
All of Region 1 |
| Blueweed |
Echium vulgare |
All of Region 1 |
| Brazilian
elodea |
Egeria
densa |
Clallam County only |
| Camelthorn |
Alhagi
maurorum |
All of Region 1 |
| Cordgrass, common |
Spartina anglica |
All of Region 1 |
| Cordgrass, smooth |
Spartina alterniflora |
All of Region 1 |
| Dalmatian toadflax |
Linaria dalmatica ssp. dalmatica |
All of Region 1 |
| Eurasian watermilfoil |
Myriophyllum spicatum |
All of Region 1 |
| Fanwort |
Cabomba caroliniana |
All of Region 1 |
|
Gorse |
Ulex europaeus
|
All of Region 1 |
| Hawkweed, mouseear |
Hieracium pilosella |
All of Region 1 |
| Hawkweed, orange |
Hieracium aurantiacum |
All of Region 1 |
| Hawkweed, polar |
Hieracium atratum |
All of Region 1 |
| Hawkweed, smooth |
Hieracium laevigatum |
All of Region 1 |
| Hawkweed, queendevil |
Hieracium glomeratum |
All of Region 1 |
| Hawkweed, yellow |
Hieracium caespitosum |
All of Region 1 |
| Hawkweed oxtongue |
Picris hieracioides |
All of Region 1 |
| Hedgeparsley |
Torilis arvensis |
All of Region 1 |
| Hoary alyssum |
Berteroa incana |
All of Region 1 |
| Indigobush |
Amorpha fruticosa |
All of Region 1 |
| Knapweed, black |
Centaurea nigra |
All of Region 1 |
| Knapweed, brown |
Centaurea jacea |
All of Region 1 |
| Knapweed, diffuse |
Centaurea diffusa |
All of Region 1 |
| Knapweed, meadow |
Centaurea jacea x nigra |
All of Region 1 |
| Knapweed, Russian |
Acroptilon repends |
All of Region 1 |
| Knapweed, spotted |
Centaurea biebersteinii |
All of Region 1 |
| Parrotfeather |
Myriophyllum aquaticum |
All of Region 1 |
| Kochia |
Kochia scoparia |
Clallam County only |
| Leafy spurge |
Euphorbia esula |
All of Region 1 |
| Lepyrodiclis |
Lepyrodiclis holosteoides |
All of Region 1 |
| Longspine sandbur |
Cenchrus longispinus |
All of Region 1 |
| Loosestrife, garden |
Lysimachia vulgaris |
All of Region 1 |
| Loosestrife, purple |
Lythrum salicaria |
All of Region 1 |
| Loosestrife, wand |
Lythrum virgatum |
All of Region 1 |
| Perennial sowthistle |
Sonchus arvensis ssp. arvensis |
All of Region 1 |
| Policeman's helmet |
Impatiens glandulifera |
All of Region 1 |
| Puncturevine |
Tribulus terrestris |
Clallam County only |
| Rush skeletonweed |
Chondrilla juncea |
All of Region 1 |
| Saltcedar |
Tamarix ramosissima |
All of Region 1 |
| Sulfur cinquefoil |
Potentilla recta |
All of Region 1 |
| Swainsonpea |
Sphaerophysa salsula |
All of Region 1 |
| Thistle, musk |
Carduus natans |
All of Region 1 |
| Thistle, plumeless |
Carduus acanthoides |
All of Region 1 |
| Thistle, Scotch |
Onopordum acanthium |
All of Region 1 |
| Water primrose |
Ludwigia hexapetala |
All of Region 1 |
| White bryony |
Bryonia alba |
All of Region 1 |
| Wild chervil |
Anthriscus sylvestris |
All of Region 1 |
| Yellow floating heart |
Nymphoides peltata |
All of Region 1 |
| Yellow nutsedge |
Cyperus esculentus |
All of Region 1 |
| Yellow starthistle |
Centaurea solstitialis |
All of Region 1 |
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