Infrequent in Indiana. The plant is inconspicuous and no doubt is more common than our map indicates. It is found only in dry, usually very sandy soil, in rather acid habitats in open black oak woods, open wooded crests of ridges, barren places in fallow, clayey fields, in sandy, fallow fields, and on sandy spill-banks of dredged ditches.
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.