Petiole 3.5-11.6 cm, puberulent to villous; leaf blade elliptic to ovate, 3.5-9.5 X 2.5-4.2 cm, puberulent to villous, base cuneate to broadly souneate, margin sparsely repand-crenate to dentate, apex acute to rounded; lateral veins conspicuous. Cymes lax, 8-15-flowered; peduncle 3-14 cm, sparsely to densely pubescent or pilose; bracts lanceolate-linear to subulate, 4-10 X ca. 1 mm, margin entire. Pedicel 3-8 mm, sparsely to densely puberulent or pilose. Calyx segments narrowly triangular, 3-4 X ca. 1 mm, outside puberulent to pilose, inside glabrous. Corolla white, ca. 8 mm, inside glabrous; tube ca. 6 mm; limb indistinctly 2-lipped, both lips ca. 2 mm. Stamens adnate to corolla ca. 2 mm above base, glabrous; filaments subulate, ca. 3 mm; staminodes 2, ca. 1 mm. Disc 2-lobed, ca. 1 mm, glabrous. Pistil ca. 7.5 mm; ovary densely puberulent. Style ca. 5 mm, glabrous; stigma obtrapeziform, ca. 0.5 mm, 2-lobed. Capsule narrowly ovoid, ca. 4.5 X 1.5 mm. Fl. Jul-Sep, fr. Aug-Sep.

* Guangxi.