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Dry and mesic prairies. Sand and hill prairies.
Amorpha canescens, Andropogon scoparius, Anemone cylindrica, Asclepias verticillata, Bouteloua curtipendula, Comandra umbellata, Heuchera richardsonii, Liatris aspera, Lithospermum canescens, Lithospermum incisa, Pedicularis canadensis, Potentilla arguta, Silphium terebinthinaceum, Sporobolis heterolepis, Stipa spartea.
IN to Manitoba and Alberta, south to KY, AR, TX, and NM.
Perennial to 1 m. Leaves pinnate compound with less than 5 pairs of leaflets; leaflets usually less than 2mm wide. Flowers purple in cylindrical heads to 2-7 cm long; calyx and bracts pubescent.
Flowers late June to late September
Wetland indicator: Upland
Northeastern plants are var. purpurea
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