Annual 2-8 dm, branched and spreading, the stems ±hirtellous on the angles; lvs thin, narrowly elliptic to lance-oblong, 3-6(-10) cm, acute, gradually narrowed to an acute or obtuse base; stipules linear, 3-5 mm; sep 2, linear or lance-linear, 4-6 mm; cor salverform, with very slender tube, white or pink, 8-11 mm; stigmas 2; fr ellipsoid, obtusely 8-ribbed, 6-9 mm; 2n=28. Wet ground; s. N.J. to s. O., s. Ill., and Mo., s. to Fla. and Tex. June-Aug.
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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