Erigeron compositus is an Arctic and alpine species of fleabane in the family Asteraceae.

[4][5] 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).

[3][6] Erigeron compositus is a perennial herb rarely more than 25 cm (10 in) tall, with a thick growth of basal leaves, the tips of which are divided.

[7] The plant produces a taproot and spreads by means of horizontal underground rhizomes.

[8] Erigeron compositus grows in rocky areas in mountains up to 3,000 meters in elevation.