Climbing shrubs, large, deciduous. Branchlets and petioles densely yellowish or brownish rigidly strigose; pith white, lamellate. Petiole 1.5-7 cm; leaf blade pale abaxially, dark adaxially when dry, ovate to narrowly ovate, 12-15 × 5.5-7 cm, papery, both surfaces sparsely to densely strigose, rarely only strigose or tomentose on midvein or glabrous on one or both surfaces, midvein and lateral veins conspicuous and raised abaxially, inconspicuous adaxially, secondary veins 7-10(-11), base cordatulate to cordate, or rounded to truncate, margin minutely serrulate, apex acute to acuminate. Inflorescences densely fasciculate, 3-5-flowered, densely ferruginous tomentose; pedicels ca. 5 mm. Flowers white. Sepals 5, ovate, ca. 3 mm, glabrous, apex acute. Petals 5, oblong-ovate, 5-6 mm, apex rounded. Anthers yellow, linear, ca. 1 mm. Ovary oblong, densely villous. Fruit cylindric, ca. 1.7 cm, tomentose when young, glabrous when mature, lenticellate. Fl. May-Jun, fr. Jul-Sep.

● Sparse forests, thickets, streamsides, moist places, roadsides; 1200-2300 m. Yunnan.