The herbarium is open to all visitors between 8:30 am and 4:30 pm Monday through Friday (except university holidays). After hours and weekend use may be arranged by special permission from the herbarium director.

All visitors should sign the visitors book. Qualified individuals may use the collections. Herbarium staff will assist novice users until the individual has become familiar with standard protocol for handling specimens. Visitors may use work space and microscopes on a first-come-first-served basis. Visitors may use the herbarium's computers as available, but those requiring extended access to computers are advised to bring their own laptop. A wireless router has been installed in the herbarium, thus a laptop with a wireless modem can gain access to the web.

Researchers from outside of Tucson interested in seeing specimens should contact us with a request for a loan. Alternatively, an increasing number of our specimens are being imaged and made available online through our data portal.