Plants with a branched caudex or short rhizome; stems 2-15 dm, scabrous-puberulent to occasionally subglabrous; lvs basally disposed, thick and firm, entire or occasionally shallowly serrate, scabrous-hispid above, the hairs on the lower surface softer, and usually longer and looser; basal and usually also some of the lowest cauline lvs long-petiolate, cordate (usually shallowly so) or subcordate, lanceolate or ovate in outline, 4-13 נ1.2-6 cm, some of the basal ones sometimes smaller and with more tapering base, those above ±abruptly smaller, narrower, and less petiolate, and generally not at all cordate, the upper sessile and lanceolate or linear; infl open-paniculiform, copiously and narrowly bracteate; invol 4.5-8 mm, its bracts well imbricate, obtusish to sharply acute, with a diamond-shaped green tip shorter than the chartaceous base, glabrous except for the often ciliolate margins; rays 10-25, blue (pink), 5-12 mm; achenes glabrous or nearly so; 2n=32. Prairies and dry open woods; w. N.Y. and s. Ont. to Minn. and S.D., s. to w. Tenn., nw. Miss., La., and e. Tex. (A. azureus; A. poaceus)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
©The New York Botanical Garden. All rights reserved. Used by permission.
Citation: The vPlants Project. vPlants: A Virtual Herbarium of the Chicago Region. http://www.vplants.org
Copyright © 2001–2009 The vPlants Project, All Rights Reserved.