Glabrous rhizomatous perennial, to 8 dm; stipules semicordate, 1.5-3 cm, the broadly rounded basal lobe often irregularly toothed; lfls 3-5 pairs, thin, elliptic to lance-ovate or obovate, 2.5-5 cm, racemes shorter than the subtending lf, with 5-10 ochroleucous fls 12-18 mm; cal irregular, the upper lobes triangular, a fourth to half as long as the lower, the lateral lobes broadest distinctly above the base; 2n=14. Dry upland woods and thickets; Vt. to Man. and nw. Can., s. to Pa., Ill., Io., and Wash. May-July.
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.
From Flora of Indiana (1940) by Charles C. Deam
Infrequent to rare in dry soil in black and white oak woods in the northern counties.
Citation: The vPlants Project. vPlants: A Virtual Herbarium of the Chicago Region. http://www.vplants.org
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