1. Black Hills State University Herbarium; 1200 University Street, Spearfish South Dakota 57799 U.S.A.
2. University of Michigan Herbarium, Department of Ecology and Evolutionary Biology; 3600 Varsity Drive, Ann Arbor Michigan 48108 U.S.A.
3. Real Jardín Botánico; CSIC, Plaza de Murillo 2 28014 Madrid Spain