1. Hedeoma hispida Pursh (mock pennyroyal, rough false pennyroyal)

Pl. 434 c–e; Map 1948

Stems 7–35 cm long, unbranched or few-branched below the midpoint, moderately to densely pubescent with mostly downward-curled hairs, sometimes with shorter, spreading hairs near the base. Leaves 5–20 mm long, sessile or nearly so, the blade linear to narrowly elliptic or narrowly oblong, bluntly to sharply pointed at the tip, the margins entire, both surfaces usually with sessile glands, sometimes very faintly so, the upper surface otherwise glabrous, the undersurface glabrous or finely hairy. Calyces 4.5–6.0 mm long, bristly-hairy along nerves, the upper lip with the 3 lobes 1.0–1.6 mm long, linear, bristly-hairy along the margins, the lower lip with the lobes 1.5–2.3 mm long. Corollas (except in cleistogamous flowers) 5.5–7.0 mm long. Nutlets 1.0–1.5 mm long, oblong-obovoid to oblong-ellipsoid, yellowish brown to dark brown, sometimes glaucous. 2n=34. May–August.

Scattered nearly throughout the state (central U.S. west to Montana, Colorado, and Texas, east to Vermont, Connecticut, Ohio, and Alabama; Canada). Glades, upland prairies, savannas, openings of dry upland forests, tops of bluffs, and banks of streams and rivers; also pastures, old fields, fallow fields, railroads, roadsides, and open, disturbed areas.

According to Steyermark (1963), this species produces only a faint minty odor when the foliage is crushed.