Climbing shrubs, large, deciduous. Branches glabrous, lenticels subconspicuous, very sparsely puberulent when young; pith white, lamellate. Petiole 3-5 cm, sparsely pilose; leaf blade abaxially pale green, adaxially green, broadly ovate to broadly obovate, 8-12 × 4-8.5 cm, papery, abaxially sparsely pubescent, hairs simple or 2- or 3-furcate, adaxially glabrous, midvein and lateral veins conspicuous abaxially, inconspicuous adaxially, lateral veins 5 or 6 pairs, veinlets in conspicuous parallel cross-bars abaxially, base rounded-cordatulate, margin ciliate-serrulate, apex obtuse to abruptly acute. Inflorescences axillary, 1-3-flowered, slightly brownish velutinous; peduncles 3-5 mm; pedicels 0.8-1.2 cm; bracts subulate, 3-4 mm. Flowers white, ca. 1.8 cm in diam. Sepals 5, oblong-ovate, 5-7 mm, both surfaces densely brownish velutinous. Petals 5 or 6, broadly obovate, 1-1.2 cm. Filaments 4-6 mm; anthers yellow, oblong, ca. 2 mm, sagittate at base. Sterile ovary globose, densely yellowish velutinous. Fruit unknown. Fl. Jun, fr. unknown.