WASHINGTON COUNTY
Click on a link below to access weed data maps for Washington County, Oregon. Data maps reflect data collected by federal, state, county and local weed control agencies; they do not always represent the entire distribution of the weed.
Sort maps by weed species
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B |
Bull thistle |
|
Cirsium vulgare |
|
B |
Butterfly bush |
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Buddleja davidii |
|
B |
Canada thistle |
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Cirsium arvense |
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B,T |
Garlic mustard |
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Alliaria petiolata |
|
A,T |
Giant hogweed |
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Heracleum mantegazzianum |
|
B,T |
Giant knotweed |
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Polygonum sachalinense |
|
B |
Himalayan blackberry |
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Rubus discolor |
|
B,T |
Japanese knotweed |
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Polygonum cuspidatum |
|
B |
Meadow knapweed |
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Centaurea pratensis |
|
B |
Perennial pepperweed |
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Lepidium latifolium |
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B,T |
Purple loosestrife |
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Lythrum salicaria |
|
B |
Scotch broom |
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Cytisus scoparius |
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B |
Slender-flowered thistle |
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Carduus tenuiflorus |
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B |
Small broomrape |
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Orobanche minor |
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B, T |
Spotted knapweed |
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Centaurea maculosa |
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B, T |
Tansy ragwort |
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Senecio jacobaea |
|
A |
Yellow floating heart |
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Nymphoides peltata |
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B, T |
Yellow starthistle |
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Centaurea solstitialis |
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