Glabrous, 5-12 dm, mostly simple; lvs linear to lance-linear, to 16 נ2 cm, sharply toothed or the narrower ones subentire, the upper gradually reduced; raceme secund; bracts lance-linear, 1-2 cm, callous-toothed; pedicels 3-6 mm, minutely scabrellate, bibracteolate at base; fls 2-2.5 cm, blue, fenestrate, the lower lip glabrous within; sep linear, 10-14 mm; auricles minute or none; 2n=28. Wet ground near the coast; s. Del. to Ga. Aug.-Oct.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.