Eupatorium serotinum Michaux. Late Eupatorium. Phen: Aug-Oct. Hab: Interdune swales, bottomland forests and openings, fields, open forests, powerline rights-of-way, tidal marshes, disturbed areas. Dist: MA, NY, MI, WI, MN, and NE south to s. FL, LA, and TX. A weedy species that has expanded in abundance and range; it was at one time apparently largely or strictly coastal in our area, but has spread inland rapidly along corridors of disturbance, somewhat similarly to Baccharis halimifolia.

Origin/Endemic status: Native

Synonymy: = Ar, C, F, Fl7, FNA21, G, GrPl, GW2, Il, K1, K4, Mi, NE, NY, Oh3, Pa, RAB, S, SE1, Tat, Tn, Tx, Va, W, WH3, WV

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Wetland Indicator Status:

• Atlantic and Gulf Coastal Plain: FAC
• Eastern Mountains and Piedmont: FAC
• Great Plains: FAC
• Midwest: FAC
• Northcentral & Northeast: FAC

Heliophily ?: 7