Tree to 30 m; lvs to nearly 1 m, with 3-6 pairs of pinnae, each with several pairs of ovate, abruptly acuminate, short-petiolulate lfls mostly 3-8 נ1.5-4 cm, or the lowest pinnae replaced by single lfls; fls greenish-white, softly pubescent, in terminal panicles 6-20 cm; hypanthium 10-15 mm; pet and sep oblong or oblanceolate, 8-10 mm, exceeding the stamens; pods 8-25 נ3-5 cm; seeds thick and hard, 10-15 mm wide and long; 2n=28. Rich moist woods, seldom abundant; N.Y. to s. Minn. and se. S.D., s. to w. Va., Tenn., Ark., and Okla., mainly midwestern. May.
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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