SUMMARYNine species of agarics and agaric allies are described from the tundra and boreal forests of the Yukon and Alaska. All 9 species are previously unreported from the St. Elias Mts. and adjacent Alaska. Several species are previously unreported from Canada or from North America. Descriptions and ecological data are given for all species, accompanied by drawings of the salient morphological features and photographs of 4 species.