Stems erect, often clustered, 4-8 dm, finely pubescent or hirsutulous with spreading hairs ca 0.5-1 mm, or occasionally only with minute, ±reflexed hairs; basal lvs broadly elliptic or ovate; cauline lvs mostly lance-ovate or ovate, sometimes narrower, usually sharply serrate, ±pubescent on both sides; cal 2-6.5 mm at anthesis; cor 2-3 cm, pale purple outside, white with fine violet lines inside, the throat moderately inflated. Cliffs and woods; Pa. to e. Tenn. and n. Ala., chiefly in the mts., but also w. to s. Ind. May, June. (P. brevisepalus)
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.
