Plants perennial. Stems erect, 13-45 cm, striate, densely brown villous or glabrescent. Petiole 2-10(-20) cm; leaf blade ovate to triangular-ovate, 2-11 × 1-11 cm, adaxially densely strigose-villous, spreading brown villous, sparsely dark brown glandular along veins, base cordate, rarely shallow hastate, margin crenate, apex acute to rounded. Verticillasters 6-flowered, crowded apically, lax basally, in racemes or panicles 10-20 cm; rachis brown villous; bracts villous, ciliate at margin, abruptly acuminate to acute at apex; upper bracts ovate, to 1.7 cm. Pedicel ca. 8 mm, brown villous. Calyx broadly campanulate, 1-1.7 cm, sparsely dark brown glandular outside, villous on veins; upper lip broad ovate, ca. 5 × 13 mm, entire or 3-mucronate; lower lip longer than upper, teeth triangular, apical spine to 1 mm. Corolla straight, 2.6-3.5 cm, pilose; tube pilose annulate inside, 2-3.4 cm, ca. 5 mm wide below annulus, adaxially abruptly dilated beyond annulus, ca. 1.1 cm wide at throat; upper lip semicircular, 5-7 mm; lateral lobes ovate, ca. 4 mm wide. Filaments ca. 4.5 mm; connectives short, 2-3 mm, arcuate, upper arms shorter than to as long as lower arms. Fl. Jul-Oct.
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