Stem and branches slender. Tendrils filiform. Petiole 4-7 cm, slightly puberulent; leaf blade ovate, 4-6 × 3-5 cm, irregularly 3-5-lobed; median lobe larger, triangular, apex acuminate; lateral lobes smaller, both surfaces puberulent, palmately 5-veined, margin dentate; sinus semicircular. Male flowers many in a raceme, flowers on upper part of peduncle; rachis filiform, 10-15 cm; pedicels linear, 0.5-1 cm, glabrous or puberulent; calyx segments lanceolate, 1.8-2 mm; corolla segments narrowly ovate, 3-5 × 1.5-2.5 mm, 1-veined, apex acuminate; filaments united, ca. 0.5 mm; anthers free, 0.8-1 mm; connective not produced; cells erect, linear. Fl. Jul-Oct.
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