Much like no. 1 [Hedeoma pulegioides (L.) Pers.]; stems simple or branched from the base, occasionally branched above; lvs linear or linear-oblong, 1-2 cm, sessile, entire; upper cal-lip cleft to the middle or below into subulate, ciliate teeth; 2n=34. Dry soil, sand dunes, and barrens; Vt. to Mich. and Alta., s. to Conn., N.Y., O., Ala., Tex., and Colo. May-Aug.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.