Herbs flexuous ascending, with short stolons. Stem solitary, to 25 cm, densely white villous, base prostrate, leafless. Petiole 1.5-5 cm, longest basally, densely white villous; leaf blade ovate, 6-9 × 4-7.5 cm, densely villous, abaxially sparsely yellowish glandular, base shallowly cordate, margin crenate, apex obtuse to rounded. Verticillasters many flowered, globose; bracteoles linear, 2-5 mm. Flowers sessile. Calyx tubular, to 1 cm, conspicuously 10-veined, slightly curved at apex, sparsely yellowish glandular, veins villous, apical part of tube and teeth puberulent inside; teeth subequal, triangular, ca. 2 mm, apex acute. Corolla ca. 2 cm, sparsely pubescent, puberulent annulate inside; tube ca. 1.8 cm, straight, cylindric, throat slightly dilated; upper lip oblong, flat, ca. 7 × 2.5 mm; middle lobe of lower lip obcordate, ca. 3 mm wide; lateral lobes ovate, ca. 2.5 mm wide. Stamens included. Ovary black-brown, glabrous. Nutlets triquetrous, oblong, glabrous. Fl. Jul-Aug, fr. Sep-Oct.
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