The 6 weeks field studies during the summer of 1987 relate to that part of the previously stated objectives (e.g. McKnight, Harper, & McKnight, 1986) concerned with the inventory of fungal species in the Wyoming national parks, particularly Grand Teton National Park. With the return of Dr. Meinhard Moser, University of Innsbruck, Innsbruck, Austria, we intended to concentrate on the Hymenomycete genus Cortinarius. The range of species studied was broadened significantly by the shorter visits of two additional collaborators, Dr. Harry Thiers, University of San Francisco, San Francisco, CA, and Dr. Joe Ammirati, University of Washington, Seattle, WA.