1. Department of Biological Sciences Humboldt State University Arcata California USA
2. Botany Department University of Wyoming Laramie Wyoming USA
3. USDA Forest Service Pacific Northwest Research Station Western Wildlands Environmental Threat Assessment Center Corvallis Oregon USA
4. USDA Forest Service Pacific Southwest Region Eureka California USA
5. Department of Forestry and Wildland Resources Humboldt State University Arcata California USA