From Flora of Indiana (1940) by Charles C. Deam
Infrequent to very local in dry, sandy or gravelly soil in open black oak woods, usually on ridges. The range in Indiana is extended by reports from Clark and Jefferson Counties.
Stem(s) slender, erect, with few to many long, spreading hairs, 4-10 dm, with a large terminal panicle; stipules narrow, 2-4 mm, caducous; petioles spreading-hairy, 2-10 mm; lfls ovate-oblong to oval, very blunt, 1.5-2.5 cm, pilose on both sides, varying to subglabrous; fls 4-5 mm, on pedicels 4-9 mm; cat 2 mm; stipe 1-2 mm; articles 1-3, obliquely obovate, 3.5-5 נ3-4 mm, the lower margin gradually curved. Dry, often sandy soil; Mass. to Ind., Mo., and se. Kans., s. to Fla., Cuba, and Tex. July, Aug. (D. obtusum, probably misapplied)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
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