Erigeron corymbosus is a North American species of flowering plants in the family Asteraceae known by the common name long-leaf fleabane. It is found in western Canada (British Columbia) and the western United States (Washington, Oregon, Idaho, Montana, Wyoming, Utah).Biota of North America Program 2014 county distribution map
Erigeron corymbosus is a perennial herb up to 50 cm (20 inches) tall, forming a taproot. Each branch produces an array of up to 16 flower heads, each head with 35–65 blue or pink ray florets plus numerous yellow disc florets.Flora of North America, Erigeron corymbosus Nuttall, Trans. Amer. Philos. Soc., n. s. 7: 308. 1840. Long-leaf fleabane
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