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Southern Ontario and southern Quebec, south through NY, NJ, PA, and in mountains to MD, WV, VA, NC, TN, and GA.
Herbaceous perennial; stems 20-120 cm, glabrous; lowest leaves cordate; middle and upper leaves relatively narrow, elongate, only shallowly cordate to subcordate or abruptly narrowed to to a conspicuously winged petiole, the upper sometimes sessile and lanceolate; involucral bracts obtuse to acute, the tip short and broad, the green tip short and broad, often lacking anthocyanin; rays 8-20, blue or purple to sometimes white, 5-10 mm.
Flowers August to October
Wetland Indicator: NA
It is thought that this species may have originated by hybridization of S. cordifolium and S. laeve. The first two photos were taken in a rush and were only later identified to be of S. lowrieanum. The last two pictures were taken many years ago and may be of S. urophyllum.
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