1. Center for Forest Mycology Research, Northern Research Station, US Forest Service, One Gifford Pinchot Drive, Madison, Wisconsin 53726-2398
2. Institute of Arctic Biology and the Biology and Wildlife Department, University of Alaska, Fairbanks, Alaska 99775
3. National Mycological Herbarium for Canada, Ottawa Research & Development Centre, Science & Technology Branch, Agriculture & Agri-Food Canada, 960 Carling Avenue, Ottawa, Ontario, Canada, K1A 0C6
4. Department of Biology, University of New Mexico, Albuquerque, New Mexico 87131