Amanitain the Rocky Mountain alpine zone, USA: New records forA. nivalisandA. groenlandica

[摘要] A limited number ofAmanitaspecies have been reported from cold dominated arctic-alpine environments, primarily with dwarf and shrub willows. This includes reports from Alaska, Canada, Greenland, Iceland, Scandinavia, Scotland, the Alps, and Russia. Here we reportAmanita nivalis ,A. groenlandica f. alpinan. f. andA. vaginataabove tree line in the Rocky Mountains withSalix reticulata, S. nivalis, S. glauca,andS. planifolia . The distribution ofAmanita groenlandicais extended to the north-central Rockies, and more definitively to the Beartooth Plateau at 3,100 to 3,400 m a.s.l. A new alpine form is described for this arctic species.Amanita nivalisis confirmed from numerous cirques and high passes 3,600-3,900 m a.s.l. in the southern Rocky Mountains (Front Range, Sawatch Range, San Juan Mountains), adding a disjunct component to its circumpolar distribution. These localities are thousands of miles from the Arctic and are likely near the southern-most extent of its distribution in North America. Rocky Mountain species are reported in context with arctic-alpine Amanita species from the Northern Hemisphere.

[学科分类] 植物学

[关键词] Agaricales;Amanitaceae;Amanita groenlandica;Amanita nivalis;alpine;Arctic;cold- climate fungi;ectomycorrhizal;Rocky Mountains;Salix;tree line