Stems erect or ascending, 2-5 dm, mostly simple; herbage glabrous or nearly so; lvs dark green, oblanceolate to oblong-obovate, 4-10 cm, a fifth to two-fifths as wide, usually widest above the middle, tapering to a sessile base; fls subsessile, usually numerous and crowded in terminal (or also axillary) infls; cal-lobes irregular, linear, 10-30 נ1-3 mm; cor 3-5 cm, tubular with erect lobes, greenish-white, striped with pale purple inside, its lobes 3-6 mm longer than the oblique, entire or 1-2-toothed plaits; anthers connate or separate; seeds wingless; 2n=36. Woods; s. N.J. to s. O. and s. Ind., s. to Ga., n. Fla., and La. Sept., Oct.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.