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King County, Washington Noxious Weed Identification and Control

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Non-designated Noxious Weeds 2008 list
(non-designate B and C weeds, control recommended but not required in King County)

Common Name Scientific Name
absinth wormwood Artemisia absinthium
Atlantic ivy Hedera hibernica
Bohemian knotweed Polygonum bohemicum
bull thistle Cirsium vulgare Cirsium vulgare
butterfly bush Buddleia davidii
Canada thistle Cirsium arvense
common fennel (except bulbing variety azoricum) Foeniculum vulgare
common groundsel Senecio vulgaris
common St. Johnswort Hypericum perforatum
common tansy Tanacetum vulgare
curly-leaf pondweed Potamogeton crispus
English ivy Hedera helix Baltica
English ivy Hedera helix Pittsburgh
English ivy Hedera helix Star
Eurasian watermilfoil Myriophyllum spicatum
field bindweed Convolvulus arvensis
fragrant water lily Nymphaea odorata
giant knotweed Polygonum sachalinense
herb Robert Geranium robertianum
Himalayan knotweed Polygonum polystachyum
Japanese knotweed Polygonum cuspidatum
lawnweed Soliva sessilis
myrtle spurge Euphorbia myrsinites
old man's beard Clematis vitalba
oxeye daisy Leucanthemum vulgare
poison-hemlock Conium maculatum
reed canarygrass Phalaris arundinacea
Scotch broom (required SR-2, I-90 E. of MP 34) Cytisus scoparius
spurge laurel Daphne laureola
wild carrot Daucus carota
yellow archangel Lamiastrum galeobdolon
yellow flag iris Iris pseudacorus
yellow toadflax Linaria vulgaris

 

Related Information:

Agencies

Program offices are located at 201 S. Jackson St., Suite 600, Seattle, WA 98104. To contact a staff member at the King County Noxious Weed Control Program, please call 206-296-0290 or by reach them by email.