Stems 4-8 dm, finely pubescent with minute, somewhat reflexed hairs, or also hirsutulous; lvs minutely hairy on both sides; infl slender, the lateral branches shorter than the internodes; cal at anthesis 5-8 mm; cor 2-2.5 cm, reddish-purple outside, the upper lobes also reddish-purple inside, the lower white inside with purple lines. Sandy soil on the coastal plain (in our area); se. Va. to Fla. and Ala. May, June.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.