1. Department of Forest Botany, Dendrology and Geobiocoenology; Mendel University in Brno; Zemědělská 3 CZ-613 00 Brno Czech Republic
2. USDA Forest Service Rocky Mountain Research Station FIA; 507 25th Street Ogden UT 84401 USA
3. Quinney College of Natural Resources and Ecology Center; Utah State University; 5230 Old Main Hill Logan UT 84322-5230 USA