Frequent to common in all parts of the state and probably found in every county. This species prefers dry soil and is found in dry, open woods of all kinds, sometimes in low woods, fallow fields and along roadsides and railroads. It usually flowers about two weeks or more later than Hedeoma hispida.
Stems erect, usually branched, 1-4 dm, provided with fine, retrorsely curled hairs at least above; lvs lanceolate or elliptic to ovate or obovate, 1-3 cm, entire or serrulate, the main ones distinctly petiolate; cal-tube 2-2.5 mm, sparsely hirsutulous, the lips 2-2.5 mm, the upper lobed a third or half its length into entire, triangular teeth, the lower cleft to the base into subulate, ciliate teeth; cor scarcely surpassing the cal; 2n=36. Upland woods; N.B. and Que. to Wis. and Neb., s. to Ga. and Ark. July-Sept.
Gleason, Henry A. & Cronquist, Arthur J. 1991. Manual of vascular plants of northeastern United States and adjacent Canada. lxxv + 910 pp.