NEW LISTING TO THE 2015 THURSTON COUNTY NOXIOUS WEED LIST
Control is required in Township 18 N, Range 2 W, Section 10 and on all transportation and utility rights of way, public land and gravel mines.
also known as “Pampas grass”, has been a widely planted favorite
in the Northwest for many years. Native to Brazil , Argentina
and Chile, established plants are a common sight in neighborhood
landscapes, its feathery, distinctive plumes reaching up to 20
feet in height. Until recent years Pampas grass seemed to be
well-behaved in the Northwest, as they were almost exclusively
female plants, grown from root divisions for their superior
ornamental qualities. Now there are both male and female plants
sold. Seed packets have been found offered for sale at local
garden retail outlets. Both Pampas grass and Jubata grass have
escaped and infested large areas in some places in the United
States, particularly California, smothering native plants and
creating serious fire hazards due to the large amount of dead,
dry material that is produced by plants every year.
On October 9, 2013 an escaped population of Pampas grass was discovered off West Bay Drive located on private property.With permission from the property owner, photos above were taken at this site. With the use of a Trimble GPS unit we logged 484 escaped plants on this property. Many seedlings as well as first year plants were found. Some young plants had plumes only 3’ high. For more information and control options, please click here.
Many noxious weeds are, in fact, escaped garden plants. Some escaped plants are temporary wanderers outside our care and nurturing, some only occupy niches where nothing else wants to grow. Some, however, become ecological bullies, crowd out native plants, poison livestock, and damage local ecosystems.
Qualities of Common Ornamental Plants
Characteristics of Noxious Weeds
Have you seen any of these plants on a roadside, hillside, by a river or stream? Have you seen them in a ditch or forested area? Chances are pretty good that they have escaped cultivation.We are currently monitoring for these species.
|Arundo donax, also known as “Giant Reed”, is a tall, erect perennial grass. It can look a lot like a rather leafy bamboo, and grows to heights of 20-30 feet when established. It may have green or variegated leaves. Arundo spreads by underground rhizomes, forming dense stands. Where it has escaped cultivation (California and much of the southern United States), Arundo has developed large, difficult to control infestations, and is a very serious fire hazard.|
|Garlic Mustard, one of the
fastest spreading invaders in woodland habitats of North
America. Up to 3 feet tall with triangular to kidney shaped
leaves and small white flowers clustered at tops of stems. Roots
and new leaves smell like garlic in the spring.
Oregon Public Broadcasting Television Presentation:Invasive Species Rapid Response
Please remember to report
plants in locations where they wouldn't have been
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Washington State Noxious Weed Control Board Monitor List
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