Herbs, to 1 m tall. Stems quadrangular, pith white. Leaves 3-5 pairs; petiole 2-4 cm or to 7 cm below; leaf blade broadly ovate, ovate-elliptic, or oblong, 6-9 X 4-6 cm, base subcordate to rounded, margin coarsely double serrate. Thyrses large and spreading, terminal on lateral branches, to 30 cm; peduncle glabrous; bracts large and foliaceous, gradually decreasing in size toward inflorescences apex. Pedicel glabrous. Calyx ca. 3 mm; lobes elliptic, apex obtuse. Corolla light green, 6-7 mm; tube 3-4 mm; lower lip lobes subequal; upper lip ca. 2 mm longer than lower lip, lobes with overlapping margins. Stamens as long as lower lip; staminode subglobose. Ovary ca. 2 mm. Style slightly shorter than ovary. Fruit unknown. Fl. Apr-May.
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