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Can hybridize with A. ericoides (A. x amethystinus Nutt.).
Wet to mesic prairies, moist meadows, calcareous fens. Also dry pastures, meadows, roadsides.
MA and VT west to ND and WY, south to D.C., TN, AR, and NM and in mountain to VA, NC, and AL. Occurs in prairies of AL and MS.
Perennial from a stout caudex and short, thick rhizome, sometimes with creeping rhizomes as well; stems clustered, to 2 m. Leaves mostly cauline, with auriculate-clasping bases. Flowers deep purple; involucral bracts and peduncles glandular pubescent.
Flowers July to October
Wetland Indicator: Facultative Wetland
Highly adaptable. Commonly seen in the fall along roadsides with Solidago canadensis.
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