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Colorado State University, Charles Maurer Herbarium (CS)

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The Charles Maurer Herbarium Collection is the third largest collection of vascular plants (> 104,000 specimens) and is the oldest herbarium (began in 1883) in the southern Rocky Mountain region. Important collections include those by J. Ackerfield, J. Cassidy, J. H. Cowen, C.S. Crandall, and H.D. Harrington. The herbarium has an excellent representation of the Colorado flora as well as the flora of the southern Rocky Mountain region. These herbarium specimens were the primary bases for the Colorado floras published by Rydberg (1906), Harrington (1954), and Ackerfield (2015).


  • Interim Curator: Tanya Dewey, tdewey@rams.colostate.edu, 7346785396


Colorado State University
Biology Department
1878 Campus Delivery
Fort Collins, CO   80523-1878
United States
(970) 491-0496

Collection Statistics

  • 101,515 specimen records
  • 63,520 (63%) georeferenced
  • 70,775 (70%) with images (70,804 total images)
  • 98,463 (97%) identified to species
  • 233 families
  • 1,707 genera
  • 7,580 species
  • 8,622 total taxa (including subsp. and var.)

Extra Statistics

Collection Type: Preserved Specimens
Management: Live Data managed directly within data portal
Last Update: 27 September 2021
Global Unique Identifier: f5db692d-95c2-4532-a9e0-76a3d2bb675a
Digital Metadata:EML File