Iowa State University, Ada Hayden Herbarium (ISC)

The Ada Hayden Herbarium has the largest collection of Iowa plants and fungi, containing over 650,000 specimens of vascular plants, bryophytes, fungi, and lichens. Functioning primarily as a research facility important for taxonomic studies (occurrence, distribution, and relationships of plants), it is also used for identifying unknown plants. Specimens are loaned to specialists at other institutions around the world to support research. Loans from other institutions allow our researchers access to other herbaria. Recently, herbaria have become a source of materials to use in molecular studies and to support basic research on biodiversity.

Curator: Deborah Lewis,, 1-515-294-9499 (ORCID #: 0000-0001-7842-1866)
Collection Type: Preserved Specimens
Management: Live Data managed directly within data portal
Global Unique Identifier: 7ee86f48-d1dd-414d-bd43-017eae4a956b
Digital Metadata: EML File
Ada Hayden Herbarium
EEOB Department
Iowa State University
319 Bessey Hall
Ames, Iowa   50011-4009
[1] 515/ 294-9499
Collection Statistics
  • 51,363 specimen records
  • 277 (0.54%) georeferenced
  • 23,793 (46%) with images (23,808 total images)
  • 46,597 (91%) identified to species
  • 33 families
  • 320 genera
  • 1,503 species
  • 1,698 total taxa (including subsp. and var.)
Extra Statistics
Taxon Distribution
Taxon Distribution
  • Acorus (44)