Perennial 30-150 cm, with several branched leafy stems. Stems sturdy, quadrangular, densely pubescent to sparsely so with eglandular hairs. Leaves ovate, 5-10 x 3-7 cm, crenate-serrate, rounded at base or truncate, ± glabrescent above, canescent below; petiole up to 4 cm. Verticillasters up to 20-flowered, distant below, crowded above. Bracts linear-subulate, half length of calyx. Pedicels c. 2 mm. Calyx 6-8 mm in flower, pilose to hirsute, with oil globules and with or without glandular hairs; teeth triangular or triangular lanceolate, acute to acuminate, throat open in fruit. Corolla greenish white with purplish markings, 15-17 mm long, soon deciduous. Staminal filaments vinous. Nutlets ovoid, c. 1.8 mm long, very glossy black, not triquetrous, apically rounded with a small round basal attachment scar.