1. Department of Botany, University of Wisconsin-Madison, 430 Lincoln Drive, Madison, WI 53711-1381, U.S.A.
2. United States of America Forest Service, Pacific Northwest Research Station, 620 SW Main St, Suite 400, Portland, OR 97205, U.S.A.
3. Integrative Research Center, The Field Museum, 1400 S. Lake Shore Drive, Chicago, IL 60605-2496, U.S.A.
4. Klamath Network – National Park Service, Southern Oregon University, 1383 Oregon St., Ashland, Oregon 97520-5011, U.S.A.
5. Volunteer Public Access Program, Wisconsin Department of Natural Resources, 101 S. Webster Street, PO Box 7921, Madison, WI 53211, U.S.A.