Erigeron compositus is an Arctic and alpine species of fleabane in the family Asteraceae. Common names include dwarf mountain fleabane, cutleaf daisy, and trifid mountain fleabane. Erigeron compositus has been found in the Russian Far East (Wrangel Island and Chukotka), Alaska, Greenland, much of Canada (all three Arctic territories plus British Columbia, all three Prairie Provinces, Quebec, Newfoundland, and Nova Scotia), and the Western United States (from the Pacific Coast as far east as the Dakotas, Colorado, and New Mexico).