Erect, rhizomatous perennial 5-10 dm; lvs lanceolate to ovate, to 15 cm, acuminate, rough-hairy to glabrous; petioles to 2 cm; ocreae pubescent and long-ciliate; racemes very slender, terminal, 1-4 dm, the ocreolae well separated below, becoming contiguous or overlapping upwards, 1-3-fld; pedicels divergent, jointed at the summit; tep 4, greenish-white or suffused with pink, 2.5 mm, the 2 lateral ones external and somewhat smaller than the median ones, scarcely changed in fr; achene lenticular, ovate, 4 mm; styles 2, persistent, indurate, deflexed, connivent, hooked at the tip; 2n=44. Moist woods; N.H. to Minn. and Nebr., s. to Fla. and Tex. (Antenoron v.; Tovara v.)
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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