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Wormwood weeds can be identified by a sage odor, yellow flowers, small leaves, a gray-green appearance and fine, silky hairs according to the Washington State Noxious Weed Control Board. Common ...
The Washington State Noxious Weed Control Board has created an online weed search form that allows you to enter the habitat, color, leaf arrangement or if known, the name of the plant to identify ...
In Washington state, the gangly invasive weed is often mistaken for Queen Anne’s Lace, wild carrot or cow parsley. The plant’s discovery can trigger a public response, as state law requires ...
In the State of Washington, Impatiens capensis is considered a class C noxious weed due to its rapid spread and tendency to outcompete native jewelweeds. [10] It has also formed a hybrid species with the native jewelweed Impatiens ecornuta. [11]
The plant is native to Europe, [5] but has also been introduced to the Americas, [6] [7] [8] Japan, [9] Australia, [10] and New Zealand, where it can be an invasive weed. It is listed as a noxious weed in the northwestern U.S. state of Washington .
Tripleurospermum inodorum has been classified as a noxious weed (class C) in the state of Washington [11] and is considered invasive in other states (it is resistant to some herbicides); it is a weed of cereals in western Canada.
In the U.S. state of Washington, it is listed as a Class B Noxious Weed and therefore banned from sale by state law. [61] [62] [63] It is also a B-listed Noxious Weed in the state of Oregon. [64] The variegated yellow archangel (Lamium galeobdolon subsp. argentatum) has become an invasive subspecies in several European countries.
For this region, the state Noxious Weed Control Board recommends the Common Camas and Golden Currant, among others. Mosquitoes may also become a concern closer to the summer months. Some species ...