University of Washington Herbarium (WTU)

The University of Washington Herbarium (also known as WTU) is an international resource for research into the diversity, distribution and ecology of Pacific Northwest vascular plants, non-vascular plants, fungi, lichen, and algae. With over 600,000 specimens currently in the collections and between 5,000-10,000 specimens added annually, WTU is one of the largest herbaria in the region.
Contact: David Giblin, Collections Manager (
Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 6 November 2012
Digital Metadata: EML File
Collection Statistics
  • 74,141 specimen records
  • 13,325 (18%) georeferenced
  • 22,659 (31%) with images
  • 64,593 (87%) identified to species
  • 138 families
  • 493 genera
  • 2,882 species
  • 3,482 total taxa (including subsp. and var.)
Extra Statistics
Taxon Distribution
Click on the specimen record counts within the parenthesis to return the records for that family