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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


  • Ernie Nelson, bnelsonn@uwyo.edu


Rocky Mountain Herbarium
University of Wyoming
Department of Botany, Dept. 3165
1000 East University Avenue
Laramie, WY   82071-3165
307/ 766-2236 or 766-4393
"Ernie" Nelson

Collection Statistics

  • 869,434 specimen records
  • 685,437 (79%) georeferenced
  • 354,931 (41%) with images (356,433 total images)
  • 816,696 (94%) identified to species
  • 293 families
  • 1,736 genera
  • 8,561 species
  • 11,265 total taxa (including subsp. and var.)

Extra Statistics

Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 7 January 2021
Digital Metadata:EML File