Lamium chinense Benth.

Herbs annual. Roots sometimes tuberlike. Stems 10-60 cm tall, densely tawny tomentose. Petiole 0.5-1.5 cm; leaf blade ovate or ovate-oblong to broadly lanceolate, 1.5-12 × 1.1-6 cm, herbaceous, base broadly cuneate, apex obtuse to acute. Verticillasters 2-4-flowered; bracts linear, ca. 6 mm, early deciduous. Calyx tubular-campanulate, ca. 1.5 × 0.7 cm, densely tomentose; teeth lanceolate, 4-6 mm, apex awned-acuminate. Corolla ca. 2.1 cm, white villous; upper lip ca. 1.1 cm, obovate, base attenuate, lower lip ca. 8 × 9 mm, lateral lobes similar to middle lobe, subcircular. Filaments glabrous; anthers purple, glabrous. Style apex unequally 2-cleft. Nutlets obovoid, ca. 2.1 × 0.9 mm, apex truncate. Fl. Mar-May, fr. Jul-Aug.