The species lists provided here cover Washington State's Vascular Plants at the county level and above. Each species entry in a list provides information about the species name and the year it was last collected in the county. The lists are based entirely on WTU's vascular plant specimen collections and are updated periodically as new specimens are added to our databases. In addition to the lists provided here, you can also search the Vascular Plant Database for an individual county or location - Mt. Rainier for example - and use the print options provided there to create lists containing additional information such as detailed collection locations, species authors, and origin.

These lists should not be considered complete county floras; they are based solely on WTU's specimen collections. Although extensive, our representation of Washington's flora has many gaps at the county level. You can help us fill the gaps by collecting and donating specimens to WTU. Further instructions can be obtained from David Giblin (wtu@u.washington.edu)