PLANT: Herbaceous perennials and annuals 15 120 cm tall; stems simple or branching, variously pubescent with simple hairs. LEAVES: petiolate, usually ovate or lanceolate, the margins dentate or serrate. INFLORESCENCE: of 1 6 verticils each subtended by involucre of whorled bracts. FLOWERS: perfect, zygomorphic; calyx tubular, 13 15 veined, the teeth 5, the apices aristate or deltoid; corolla white to pink or purple, bilabiate, the tube longer than the lips, the upper lip galeate, arched, or straight, the lower lip spreading, 3 lobed; stamens 2 (and sometimes 2 staminodes), seated within the throat, often exserted, the anther sacs linear; style exserted; stigma unequally 2 lobed. NUTLETS: ovoid, smooth to somewhat reticulate. REFERENCES: Henry, April M. 2003. Lamiaceae. J. Ariz. - Nev. Acad. Sci. Volume 35(2).