The volume documents the field work of Robert J. Horodyski in Montana, California, and Nevada (Belt, Kingston Range), 1991. Entries are headed with specimen number (RH91-7-26-1 to RH91-8-12-1), followed by description, and location information including elevation. Several specimens were also collected from Appekunny [Apikuni] Mountain.
Many of SIA's holdings are located off-site, and advance notice is recommended to consult a collection. Please email the SIA Reference Team at osiaref@si.edu.