Climbers to 6 m tall. Branches densely ferruginous pubescent when young, glabrous and lenticellate with age. Petiole ca. 5 mm, ferruginous tomentose; leaf blade oblong-lanceolate to narrowly oblong, 7-18 × 1.7-3.8 cm, papery, abaxially ferruginous tomentose, adaxially sparsely pubescent but denser along midvein, secondary veins 13-19 on each side of midvein, obliquely ascending, and adaxially impressed, base rounded, apex slightly acute. Inflorescences usually leaf-opposed, sometimes pseudoterminal, in glomerules, several flowered, densely ferruginous tomentose; peduncle very short to almost absent. Pedicel 2-bracteolate. Flower buds ovoid, ca. 1 cm. Sepals ovate-oblong, ca. 6 mm. Outer petals ovate-elliptic, ca. 8 × 4 mm; inner petals oblong-elliptic, smaller than outer petals, margins connivent. Stamen connectives apically long acuminate. Carpels ovate-oblong, villous; ovules ca. 10 per carpel, in 2 series; styles filamentous; stigma apex entire. Fruit not seen. Fl. Feb-Sep, fr. Jun-Nov.

● Densely forested slopes, usually in valleys; 200-500 m. SW Guangxi, SE Yunnan.