The Friesner Herbarium (BUT) of Butler University
The Friesner Herbarium (BUT) of Butler University is a collection of over 100,000 specimens built from the personal herbarium of Ray C. Friesner. He and other botanists at Butler amassed one of the largest and most complete collections of Indiana plants. Active exchange from the 1920’s through the 1940’s increased the holdings of plants from other states. Although the collection does not contain many type specimens, it is rich in vouchers from floristic and ecological studies conducted in the first half of the 20th century and published in the scientific journal,Butler University Botanical Studies.
Version of record can be found through Springer.
Dolan, Rebecca W., "The Friesner Herbarium (BUT) of Butler University" Brittonia / (1991): 54-56.
Available at http://digitalcommons.butler.edu/facsch_papers/810