Rocky Mountain Herbarium (RM)

Founded in 1893 by Aven Nelson, the Rocky Mountain Herbarium (RM) contains the largest collection of Rocky Mountain plants and fungi in existence with additional representation of the floras of other parts of the Northern Hemisphere. It ranks 17th in the nation with 825,000 specimens [with approximately 25,000 new specimens added each year] and is the largest facility of its kind between St. Louis, Missouri, and Berkeley, California
Contact: Ernie Nelson (
Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 28 January 2017
Rocky Mountain Herbarium
University of Wyoming
Department of Botany, Dept. 3165
1000 East University Avenue
Laramie, WY   82071-3165
Collection Statistics:
  • 849,019 specimen records
  • 663,194 (78%) georeferenced
  • 137,044 (16%) with images
  • 786,333 (93%) identified to species
  • 305 families
  • 1,823 genera
  • 8,859 species
  • 11,528 total taxa (including subsp. and var.)
Extra Statistics