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Marshy areas. Disturbed or burned bogs. Calcareous wet prairies and sedge meadows (narrow leaved form)
In marshes with Asclepias incarnata, Bidens cernua, Thelyptris palustris, Eupatorium maculatum, Eupatorium perfoliatum, Leersia oryzoides, Sagittaria latifolia, Typha latifolia.
MA, southern Ontario, northern WI, and eastern MN, south to NC, KY, and NE.
Annual or biennial to 1.5 m; glabrous throughout. Leaves deeply pinnately divided into 3-7 divisions; divisions linear-oblong, coarsely serrate, more than 3 times longer than wide. Ligules of flowers yellow, longer than the involucre. Seed and achene, cuneate-oblong, up the 2mm broad, the margins strigose-ciliate.
Flowers mid June to early October
Wetland indicator: Obligate
One of the more attractive members of this genus.
Gleason, Henry A.
and A. Cronquist. 1991. Manual of Vascular Plants of Northeastern United States
and Adjacent Canada. Second Ed.
The New York Botanical Garden. Bronx, NY
Swink, F. and G.
Wilhelm. 1994. Plants of the Chicago Region.
Indiana Academy of Science. The Morton Arboretum. Lisle, Illinois
Michael Hough © 2004