Stems usually 2-5 together, 1.5-5 dm, retrorsely puberulent below, glandular-hairy in the infl; cauline lvs lance-oblong, 4-8 נ0.8-2 cm, entire or with a few low teeth, rounded at base, glabrous to puberulent or scabrous; infl strict, 0.6-2.5 dm; pedicels, cal and cor glandular-pubescent; cal 4-7 mm at anthesis; cor white or faintly violet-tinged, 1.5-2 cm, weakly bilabiate, the tube gradually dilated upward, finely glandular-puberulent within; seeds 2-3 mm; 2n=16. Dry prairies; w. Minn. and w. Io., w. to Alta., Wyo., and N.M. May, June.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.