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Synonymous with Cacalia suaveolens, Hasteola suaveolans, and Synosma suaveolens.
Riverbanks and floodplain woods.
RI and CT, west to southeast MN, south to MD, KY, TN, IL, and in mountains to GA.
Perennial from long, fleshy-fibrous root; stems 1-2.5 m, striate or grooved, simple to the inflorescence, glabrous, leafy; middle and lower leaves triangular-hastate, about as wide as long, sharply toothed, petiolate; upper leaves progressively less hastate and with shorter, more winged petioles; heads in a flat-topped inflorescence, often 20-40 flowered; disk 7-11 mm wide; involucres 1 cm; involucral bracts 10-15, often with some of the outer reduced but conspicuous, loose, and subulate; receptacle flat, deeply pitted.
Flowers late July to September
Wetland indicator: FACW
Fairly easy to identify because of its large size and distinctive hastate lower leaves.
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
Michael Hough © 2018