Plants perennial. Stems to 60 cm, ascending, spreading pilose. Petiole of basal leaves to 13 cm, 0.5-2.5 cm in stem leaves; basal leaf blades ovate to triangular-ovate, 9-11 × 5-7 cm, papery, pilose especially on veins, abaxially densely red-brown glandular, base cordate or hastate, margin coarsely crenate-serrate or double serrate, apex acute; stem leaves smaller, broadly triangular-ovate to triangular. Verticillasters 2-6-flowered, widely spaced, lower ca. 2.5 cm apart, upper somewhat compact, in racemes or panicles ca. 13 cm; rachis densely pilose; bracts elliptic to lanceolate. Pedicel 2-4 mm, densely pilose. Calyx campanulate, ca. 1 cm, pilose mainly along veins, densely dusty pubescent, margin pilose; upper lip triangular, ca. 5 × 8 mm, margin entire, apex ± 3-mucronate; lower lip ca. 6 mm, teeth ovate-triangular, apex short acuminate. Corolla blue-purple, ca. 2.5 cm, pilose; tube pilose annulate inside, campanulate, ca. 2 cm, adaxially dilated above middle, throat slightly constricted, ca. 9 mm in diam; upper lip ca. 5 × 8 mm; lower lip ca. 1 × 1.4 cm, middle lobe broadly obovate, 5 × 6-7 mm; lateral lobes semicircular, ca. 4 mm wide. Filaments ca. 7 mm; connectives arcuate, arms subequal. Nutlets dark brown, ellipsoid, glabrous, apex rounded. Fl. Jul-Aug.
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