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.
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A climbing shrub. It grows up to 10 m long. The fruit is 1.7 cm long and 1 cm wide.
Sparse mountain forests, ravines, streamsides, moist places, roadsides and thickets at elevations of 1,200-2,300 metres in Yunnan.
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It grows naturally in S Yunnan in SW China in mountain forests and in ravines, 1200-1650 metres.
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