Herbs perennial. Stems few, 45-60 cm, puberulent basally, glandular puberulent upward. Petiole 1-2.5 cm; leaf blade oblong-lanceolate, 5.5-10.5 × 2-3.8 cm, wider basally, gradually narrowed to apex, membranous, puberulent, adaxially olive green, abaxially greenish, base rounded to shallowly cordate, margin coarsely mucronate-crenate, apex obtuse. Verticillasters on 3-5 apical nodes, close together, few flowered; peduncle 2-5(-25) mm; bracts linear, 1.5-2 mm, glandular puberulent. Calyx 9-10 mm, glandular puberulent, throat very oblique; teeth of upper lip triangular-lanceolate, 1.8-2.1 mm; teeth of lower lip linear, 4.2-5 mm. Corolla purple, 2-2.2 cm, sparsely puberulent; tube slightly incurved, base 1.2-1.5 mm wide, narrowest part slightly exserted, abruptly dilated into throat ca. 6.5 × 7 mm; upper lip deeply 2-lobed, straight, ca. 3.5 mm; lower lip upwardly oblique, ca. 1 cm; middle lobe inversely cordate, 2-lobulate, base bearded; lateral lobes obliquely semicircular, conspicuous. Style exserted, apex 2-cleft. Fl. Aug.
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