Climbers dioecious. Stems black when dry, ca. 6 mm thick, ridged. Petiole 1.5-2 cm, prophylls ca. 1/3 as long as petioles; leaf blades toward base of stem elliptic, 13-15 × 5.5-6 cm, papery, densely finely glandular, base rounded and emarginate, sinus only 1/2 as wide as petiole, apex acute; veins 7, apical pair arising 2-2.5 cm above base, alternate, reaching leaf apex; reticulate veins conspicuous, ± transversely oblong; leaf blades toward apex of stem ovate-lanceolate or narrowly elliptic, 6-9 × 2-3.5 cm, base gradually tapered or cuneate, rarely rounded, usually emarginate, sinus narrower than petiole, apex caudate-acuminate. Male spikes not seen. Female spikes leaf-opposed, 25-30 × ca. 1 cm in fruit; peduncle ca. 5 cm, finely striated; rachis pubescent; bracts suborbicular, sometimes base slightly tapered, peltate, stalk short, ca. 1.5 mm in diam., margin densely ciliolate. Ovary deeply immersed in rachis; stigmas 3-5, linear. Unripe drupe mostly immersed in rachis, 4- or 5-sided, scabrous, umbonate. Fl. May-Jun.

* Forest margins and wet places along streams; circa 1600 m. W Yunnan