Annual to 1 m, usually branched, loosely hairy throughout, or the upper part of the stem and upper surfaces of the lvs subglabrous or merely strigose; lvs sessile or subsessile, ovate-oblong to oblong-obovate, 5-8 נ1.5-3.5 cm, ±serrate; racemes terminating the branches, 1-2 dm; lower bracts foliaceous, the upper gradually reduced; pedicels 3-9 mm, bibracteolate at base; sep linear, 3-5 mm; auricles wanting; cor blue or white, 6-8 mm, the lower lip bearded at base within; fruiting hypanthium inflated, 7-11 נ3.5-8 mm; 2n=14. Open woods, or sometimes a garden-weed; P.E.I. to Minn., s. to Ga. and Miss. July-Oct. Poisonous.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.