Erect or decumbent at base, 3-5 dm, with decumbent basal stolons; lvs lance-ovate to oblong, 3-5 cm, obtuse or acute but not sharp-pointed; infl a loosely branched, glandular- hairy cyme, the branches on distinct peduncles, the pedicels often 5-10 mm; cor usually pale blue-purple, varying to red-purple or white, 2-3 cm wide, the glabrous tube 1-2 cm; style short; 2n=14. Rich moist woods; nw. Vt. and adj. Que. to Minn., s. to Ga. and Tex. Apr.-June. Var. divaricata, with the cor-lobes notched at the tip, is eastern, ranging w. to Mich. and e. Ill. Var. laphamii A. W. Wood, with entire cor-lobes, is more western, but occasional plants in the range of one var. have the cor-lobes of the other.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.