Stems simple or commonly branched, 1-4 dm; cauline lvs below the branches (usually lacking at anthesis) oblanceolate to spatulate; lvs subtending the branches sessile or short-petiolate, 2-6 cm, narrowly linear to lance-ovate; bracteal lvs often laciniately toothed near the base; cal-lobes subulate, longer than the tube; cor 6-12 mm, white with yellow palate; fr 8-10 mm; 2n=18. Woods, or toward the n. also in bogs or wet soil; Lab. to B.C., s. to Va., O., n. Ind., and Minn., and along the mts to Ga. Four vars.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.