Herbs perennial. Stems ca. 1 m, densely glandular puberulent. Leaves opposite; petiole 1.7-5.7 cm, glandular puberulent; leaf blade broadly ovate to ovate, 3.7-13 × 3-10.5 cm, thin papery, adaxially densely puberulent, pilose or densely pilose, abaxially puberulent, spreading pilose on veins, base ± shallowly cordate to cuneate, margin mucronate crenate or crenate-serrate, apex acute to acuminate, lateral veins 1-4-paired. Panicles terminal and axillary, 15-50 × 6-12 cm, glandular puberulent; cymes pedunculate, 7-15-flowered; lower floral leaves subsessile or sessile, upper bractlike, oblate to broadly ovate, 5-12 × 2.5-12 mm, apex acuminate. Pedicel 6-12 mm. Calyx campanulate, ca. 4.5 × 4 mm, purplish, densely minutely glandular pubescent, 2-lipped; teeth subequal, acuminate, 2/3-3/4 as long as calyx, upper 3 lanceolate-triangular, lower 2 narrowly triangular. Corolla blue, ca. 1.1 cm, tube 5-6 mm, upper lip as long as lower lip. Stamens exserted. Style exserted. Nutlets yellowish, ovoid-oblong, ca. 1.6 × 1 mm. Fl. and fr. Sep-Oct.
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