University of Guam Herbarium (GUAM)

The University of Guam Herbarium specializes in research on the insular floras of Guam, the northern Mariana Islands and Micronesia, a region in the western tropical Pacific of over 2000 islands in an area the size of the continental United States. Important collections include those of P.H. Moore, A.F. Rinehart, B.C. Stone and R.T. Tsuda. The Herbarium contains over 57,000 specimens (with 46,000 phanerogams and pteridophytes) and is listed in the Index Herbariorum, the world directory of public herbaria. We currently seek inquiries for exchange of specimens, which should be directed via post to the Curator.

The UOG Herbarium was established to further the knowledge of the plants of Guam and other islands of Micronesia. A large collection of exemplars collected world-wide is devoted to teaching. The collections also serve as a reference tool for local and visiting scientists. Systematic research is published in technical papers and peer-reviewed publications for the wider scientific community. Herbarium staff provide expertise in botany for local needs, such as environmental impact assessments and conservation and management efforts via surveys and the assembling of inventories of protected areas.

Reference: The University of Guam: The first Forty-Five Years.

Contacts: Wei Xiao,
Collection Type: Preserved Specimens
Management: Data snapshot of local collection database
Last Update: 24 January 2016
Digital Metadata: EML File
Rights Holder: University of Guam
Access Rights: not-for-profit use only
University of Guam
Science Bldg., Room 105
Mangilao, Guam   96923
Unites States
Collection Statistics
  • 5,258 specimen records
  • 4,514 (86%) georeferenced
  • 1 (0.02%) with images
  • 2,312 (44%) identified to species
  • 109 families
  • 172 genera
  • 344 species
  • 349 total taxa (including subsp. and var.)
Extra Statistics