Herbs, slender, 30-40(-80) cm tall. Rhizomes slender. Stems glandular hairy. Leaves often crowded below, ca. 4 or 5 pairs, increasing in size upward; petiole to 3.5 cm, narrowly winged, pilose; leaf blade elliptic-ovate to oblong-obovate, to 8 X 5 cm, sparsely white hairy on both surfaces or only on veins abaxially, base subcordate, truncate, or broadly cuneate, margin undulate and double serrate. Thyrses terminal, narrow, 8-20 cm; cymes 2-5-flowered; peduncle ca. 2 cm, glandular hairy; bracts small. Pedicel ca. 2 cm, glandular hairy. Calyx ca. 4.5 mm; lobes ovate-orbicular, apex obtuse-rounded. Corolla green, 7-10 mm; tube subglobose; lower lip middle lobes smaller than lateral lobes; upper lip lobes orbicular, with overlapping margins. Stamens as long as or slightly longer than lower lip; staminode obcordate to subglobose, as wide as long. Ovary ca. 2 mm. Style to 3 mm. Capsule narrowly ovoid, ca. 8 mm. Fl. May-Aug, fr. Aug-Sep.
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