Using the Collections

Using the Collections

Accessions and Exchanges

The continuous growth of the herbarium holdings is a reflection of the on-going research efforts to increase our knowledge of species diversity and distribution from the United States.

New acquisitions result primarily from:

  1. faculty and students collections
  2. non-academic professionals, including agency biologists, and environmental consultants
  3. gifts sent for identification
  4. amateur botanists

We are grateful for any donations made to the collections. Specimens submitted for accessioning in the herbarium should meet the following criteria:

  1. Be properly curated, with sufficient material to occupy a standard herbarium sheet (12x18 inches)
  2. Extraneous plants and dirt should be removed (note associated species and substrate information on label
  3. Specimens must be fertile (i.e., possessing reproductive structures [flowers and/or fruits]) or posses other critical identifying features appropriate to the group
  4. Be accompanied by field data


Loans are made to botanical institutions or departments engaged in taxonomic research and postgraduate instruction. These institutions are mostly, but not exclusively, listed in Index Herbariorum. Ordinarily, loans are not made to individuals, but exceptions may be made.

Written loan requests must be submitted to the Curator of the Herbarium. Loan requests should state:

  1. The name(s) of the workers on whose behalf they are made
  2. The basic reason for the request
  3. The precise nomenclatural or taxonomic scope of the study, including any synonyms, and the precise geographical range of the investigation, if applicable

Upon receipt of shipment, please verify the number of items sent, sign and return the pink copy of the invoice to the Curator of the Herbarium. Loans are made for a period of one year. If there is need for further retention of the material being studied, a request for an extension of the loan period should be made to the Curator of the Herbarium. HTTU reserves the right to request the return of its materials at any time.

Destructive Sampling Requests

No portion of the specimen on a herbarium sheet may be removed without the prior written approval of the Curator of the Herbarium, but routine, careful, dissection of parts on sheets or in fragment packets is permitted. Parts should be returned to the fragment packet.

Written authorization must be obtained for removal of any material for destructive sampling, SEM or anatomical study. This includes material for DNA extraction, pollen, spores, leaves, wood or any other structure. Specific guidelines for authorized sampling will be provided on request. Contact the Curator of the Herbarium for additional information.

The Paul L. Hollister Herbarium is located in Pennebaker Hall, 1100 North Dixie Avenue, Cookeville TN. To visit the herbarium, please make an appointment with Dr. Shawn Krosnick (931-372-6194 or

If visiting from off-campus, please stop by the Biology office (207 PENN) to obtain a temporary parking permit. The herbarium is located in room 204 PENN.

Click here for a PDF map of the TTU Campus.