Climbing shrubs, large, deciduous. Branchlets sparsely puberulent to glabrous, lenticels conspicuous; buds densely yellowish tomentose; pith brown, lamellate. Petiole 4-4.5 cm, sparsely puberulent; leaf blade abaxially pale green, adaxially dark green, obovate to obovate-obtriangular, 11-14.5 × 6-7 cm, papery, sparsely stellate tomentose with hairs easily rubbing off, subglabrous adaxially, midvein and lateral veins conspicuous abaxially, sulcate adaxially, lateral veins 8 or 9 pairs, reticulate veinlets inconspicuous, with subconspicuous parallel cross-bars, base rounded and cordatulate, oblique, margin ciliate-serrulate, apex abruptly acute to truncate. Flowers white. Sepals 4 or 5, ovate, 5.5-6.5 mm, both surfaces brownish tomentose. Petals broadly obovate, 0.9-1.3 cm, narrowed at base. Filaments 2-3 mm; anthers yellow, oblong, 2-2.5 mm, sagittate at base. Sterile ovary globose, ca. 2.5 mm in diam., densely brownish tomentose. Fruit obovoid, glabrous. Fl. May-Jun, fr. Sep.

● 1200-1600 m. Guizhou (Jiangkou, Qingzhen), Yunnan (Shizong).