Erigeron caespitosus is a North American species of flowering plants in the family Asteraceae known by the common name tufted fleabane. It is native to western Canada (Yukon, British Columbia, Alberta, Saskatchewan, Manitoba) and the United States (Alaska and mountains of the western United States, primarily the Rockies, as far south as Arizona and New Mexico)Biota of North America Program 2014 county distribution mapBiota of North America 2014 state-level distribution map
Erigeron caespitosus is a perennial herb up to 30 cm (12 inches) tall, forming clumps over a taproot and usually covered with stiff hairs. One plant will produce numerous flower heads in groups of 1–4 at the ends of upper branches. Each head contains as many as 100 white or blue ray florets surrounding many small yellow disc florets.Flora of North America, Erigeron caespitosus Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 307. 1840. Tufted fleabane
References