Boeica tonkinensis (Kraenzlin) B. L. Burtt; Didymocarpus tonkinensis (Kraenzlin) Handel-Mazzetti; Oreocharis tonkinensis Kraenzlin.

Subshrubs. Stems 10-30 cm, densely villous. Petiole 0.5-2.8 cm, densely villous; leaf blade obovate to elliptic, 4.5-18 X 3.5-6.5 cm, adaxially sparsely villous, abaxially sparsely villous, densely villous along veins, base sometimes oblique, cuneate to rounded, margin serrate, apex acute to broadly acute; lateral veins 8-11 on each side of midrib. Cymes 3- to many flowered; peduncle 3.5-8 cm, densely villous; bracts 2, sometimes several, linear to oblong, 1.5-5 mm. Pedicel 0.8-2.5 mm. Calyx segments narrowly lanceolate to elliptic, 4-5 X 1-1.3 mm, outside densely villous, margin entire to dentate. Corolla white to pinkish, 3-7 mm, outside glabrescent; tube not swollen, 1-1.5 mm; lobes suborbicular, 2-5 X 2.5-4 mm. Filaments 0.6-1.5 mm, glabrous; anthers dehiscing poricidally; staminode ca. 0.3 mm. Disc ringlike. Pistil puberulent and glandular puberulent; ovary conical, 1.2-1.5 mm. Style unappendaged, 1.4-3 mm. Capsule 2-2.8 cm. Fl. Jun-Aug, fr. Aug.

Rocks in forests on slopes; 800-1200 m. SE Yunnan [Myanmar, N Vietnam].