About WNPS
Administration
Calendar
Contact WNPS
History
How to Donate
Membership
Activities
Conservation
Ecosystems
Education
Landscaping
Native Plant Lists
Publications
Research
Restoration
Local Chapters
Field Trips
Programs
Plant Sales
Priorities
Garry Oak
Invasive Species
Shrub-Steppe
Programs
Growing Wild
Ivy Out
WNPS Stewards
An Affiliate of
Earthshare of Washington
The Washington Native Plant Society is encouraging members and other interested participants to help improve scientific documentation of invasive plants in Washington through herbarium collections.
To identify what specimens are needed from each county, click on the counties of the Washington map below.
See how to make collections and what to do with them once you have collected them. If possible, collections in triplicate of each species for any county would be helpful, as they will be shared with other institutions.
Even if you can only collect a few specimens your effort and your willingness to follow through with correct label information and mailing will be a contribution to science.
The history of your collection will be preserved for generations to come at the University of Washington and Washington State University.
Adams | Asotin | Benton | Chelan | Clallam | Clark | Columbia | Cowlitz | Douglas | Ferry | Franklin | Garfield | Grant | Grays Harbor | Island | Jefferson | King | Kitsap | Kittitas | Klickitat | Lewis | Lincoln | Mason | Okanogan | Pacific | Pend Oreille | Pierce | San Juan | Skagit | Skamania | Snohomish | Spokane | Stevens | Thurston | Wahkiakum | Walla Walla | Whatcom | Whitman | Yakima