Shrubs to 1 m. Stems slender, ascending, yellowish brown, densely glandular, pubescent and pilose, much branched, branches and branchlets flexuous. Leaves opposite; petiole slender, 1.5-3 cm; leaf blade triangular-ovate, 2-4 × 1.3-2.8 cm, ± membranous, adaxially sparsely pilose, yellowish glandular, abaxially sparingly glandular, pilose on veins, base broadly truncate to ± truncate, margin dentate, apex acute, lateral veins 4-paired. Panicles terminal, ca. 10 cm, densely pubescent; cymes pedunculate, 3-5-flowered, glandular; floral leaves and bracts acute, margin crenate or subentire. Calyx campanulate, ca. 3 mm, pubescent, glandular, slightly 2-lipped; teeth ovate-triangular, ca. 1.5 mm, lower 2 slightly longer, apex acute, ciliolate; fruiting calyx tubular-campanulate, dilated to 7 mm, upwardly curved. Corolla white or pink, to 1.1 cm, sparsely pubescent, glandular, tube ca. 5 mm, upper lip ca. 4 mm, lower lip ca. 6 mm. Stamens included. Style included. Nutlets triquetrous, ellipsoid, ca. 2 mm, yellowish, with yellowish white marks. Fl. and fr. Sep.