Blue fleabane

Erigeron acer
Scientific classification
Kingdom:	Plantae
(unranked):	Angiosperms
(unranked):	Eudicots
(unranked):	Asterids
Order:	Asterales
Family:	Asteraceae
Tribe:	Astereae
Genus:	Erigeron
Species:	E. acer
Binomial name
Erigeron acer L.
Synonyms
Synonymy Erigeron acris L. Erigeron acre L. Aster erigeron E.H.L.Krause Aster glabratus (Hoppe & Hornsch.) E.H.L.Krause Erigeron alpinus Lam. 1779 not L. 1753 Erigeron alpinus Ledeb. 1833 not L. 1753 Erigeron angustatus Fr. ex Nyman Erigeron elongatus Moench Erigeron glaberrimus Scheele ex Nyman Erigeron glabratus Hoppe & Hornsch. ex Bluff & Fingerh. Erigeron muelleri Lund ex Nyman Erigeron paniculatus Meig. & Wenig. Erigeron pseudoacris Schur Erigeron scaber Willd. ex Spreng. Erigeron villarsii Willd. Erigeron vulgaris Scheele ex Nyman Trimorpha acris (L.) A.Gray

Erigeron acer is a widespread herbaceous plant. Common names include bitter fleabane and blue fleabane. The species is native to Canada, colder parts of the United States, northern, central, and southeastern Asia, and most of Europe.

Erigeron acer is a biennial or perennial herb up to 100 cm (40 inches) tall, producing a taproot and a woody rhizome. One plant can produce many small flower heads, each with pink, lilac, or occasionally white ray florets and yellow disc florets.

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Wikipedia