Hedeoma pulegioides is an annual herb to 40 cm tall, stem branched, curly-hairy, especially above.
Leaves opposite, elliptic to egg-shaped, 1-3 cm long, margin sometimes toothed, main leaves stalked.
Flowers blue, tubular, bilaterally symmetrical, to 0.5 cm long, weakly 2-lipped, upper lip erect, notched, scarcely longer than calyx, calyx tubular, ribbed, 2-lipped, lips 0.2 cm, ovary superior, 4-parted; inflorescence of small whorls in upper leaf axils; blooms and fruits July-Sept.
Fruit dry, of 4 1-seeded nutlets.
Wetland status: UPL.
Frequency in NYC: Very infrequent.
Habitat: Upland woods.
Notes: Plant smells and tastes like the European pennyroyal (Mentha pulegium).