(see p. 344). Calyx,'5-toothed, hairy within. Corolla, 2-lipped, the erect upper lip notched, the lower 3-divided. Stamens, with 2 anthers protruding, standing apart. Fruit, 4 small nutlets. Leaves, opposite (1 inch long or less), smooth, dotted, toothed, with rounded or heart-shaped bases, sessile. August and September.
A much-branched, stiff little plant, often with reddish stems, and flowers in terminal clusters. It has a sweet, minty odor, which it retains when dried. It is not hard to find among the hills from New Jersey to Georgia and westward.