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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

Links to other floras: = Eupatorium serotinum - FNA21

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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

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image of plant© Keith Bradley | Original Image ⭷
image of plant© Aidan Campos source | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Jay Horn source | Original Image ⭷
image of plant© Alan M. Cressler | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷
image of plant© Richard & Teresa Ware CC-BY-NC, permission granted to NCBG | Original Image ⭷
image of plant© Gary P. Fleming | Original Image ⭷
image of plant© Erik Danielson source | Original Image ⭷

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Horticultural Information

NCBG trait

Intro: Erect perennial of interdune swales, tidal marshes, open forests, fields, powerline rights-of-way and other open, disturbed areas.

Stems: Stems much-branched above, often dark red, densely and finely hairy.

Leaves: Leaves opposite, petiolate, tending to droop downward, oval to lance-shaped, to 7 in. long, with 3 prominent veins, coarsely toothed, gland-dotted and smooth or short-hairy.

Inforescence:

Flowers: Composite flowers (heads) arranged in flat-topped clusters; heads white, about 1/4 in. tall and consisting of 9-15 tiny, white, tubular disk florets, each with 5 triangular corolla lobes and 2 protruding style branches. Several series of green and white bracts surround the base of each head.

Fruits:

Comments:

Height: 3-6 ft.

plant sale text:

bloom table text:

description: Erect perennial of interdune swales, tidal marshes, open forests, fields, powerline rights-of-way and other open, disturbed areas.

stems: Stems much-branched above, often dark red, densely and finely hairy.

leaves: Leaves opposite, petiolate, tending to droop downward, oval to lance-shaped, to 7 in. long, with 3 prominent veins, coarsely toothed, gland-dotted and smooth or short-hairy.

inflorescence:

flowers: Composite flowers (heads) arranged in flat-topped clusters; heads white, about 1/4 in. tall and consisting of 9-15 tiny, white, tubular disk florets, each with 5 triangular corolla lobes and 2 protruding style branches. Several series of green and white bracts surround the base of each head.

fruits:

comments:

cultural notes:

germination code:

native range: eastern United States