Plants perennial. Stems 1 to few, 20-57 cm, erect, retrorse villous. Petiole 1-13 cm; leaf blade hastate to narrowly ovate, 3.5-11 × 2-5 cm, densely red-brown glandular, adaxially densely white pubescent when young, pubescent with age, abaxially densely white pubescent when young, glabrous except for puberulent veins, base shallowly cordate to hastate, margin irregularly crenulate, apex acute to short acuminate. Inflorescences densely spreading villous, glandular pilose; verticillasters 2-flowered, widely spaced, in terminal racemes or panicles 1-15 cm; bracts broadly ovate, 6-9 mm, slightly pilose, red-brown glandular, ciliate, apex abruptly acuminate. Pedicel ca. 2 mm. Calyx campanulate, (1-)1.3-1.6 cm, villous especially on veins, red-brown glandular; upper lip broadly triangular, 4-5 × ca. 9 mm, margin entire, apex mucronate; lower lip slightly longer than upper, teeth triangular, apex mucronate. Corolla purplish, 2-2.3 cm, pubescent; tube obliquely and continuously pilose annulate inside, ca. 1.6 cm, ca. 2.5 mm wide at base, adaxially gradually dilated to apex, slightly constricted, ca. 8 mm wide at throat; upper lip obcordate, ca. 3 × 5 mm; lower lip enlarged, ca. 5 × 11 mm; middle lobe subflabellate, ca. 3 × 6 mm, undulate; lateral lobes semicircular, to 3 mm. Filaments ca. 5 mm; connectives 1.8-2 mm, arms equal. Style slightly exserted. Nutlets obovoid, ca. 2 mm, black. Fl. Jun-Jul.
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