Herbs, climbing. Stems and branches glabrous, longitudinally angular-sulcate. Petiole 6-8 cm, glabrous; leaf blade ovate-cordate, 10-20 × 6-12 cm, membranous, abaxially glabrous, adaxially densely setose, basal lateral veins along margin of sinus, margin dentate, apex acuminate; basal sinus rounded, sometimes closed. Tendrils 2-fid. Male flowers 10-20 at apex of peduncle in congested subumbelliform raceme; peduncle 10-20 cm, sometimes with a leaflike bract; bract 15-20 × 10-13 mm; pedicels slender, 3-6 mm or sometimes to 15 mm; calyx tube obconical; segments lanceolate-oblong, 10-12 × ca. 2.5 mm, abaxially puberulent, distinctly 3-veined, apex obtuse or acute; corolla segments ovate, ca. 15 × 9 mm, adaxially glandular pubescent, 5-veined, apex obtuse, base of corolla with 2 yellow scales; filaments 3-4 mm, sparsely puberulent; anthers elliptic, ca. 1.5 mm. Female flowers solitary, or 2 or 3 at apex of peduncle; peduncle ca. 1(-3) cm; pedicels 1.5-3 cm; calyx tube obconical; segments lanceolate-oblong, 10-15 × ca. 3 mm, distinctly 3-veined, base slightly narrowed, apex obtuse; corolla segments oblong, 2.5-2.7 × 1-1.2 cm, 5-veined, apex acuminate; ovary narrowly oblong, ca. 15 × 5-6 mm, smooth, subglabrous, base truncate, apex slightly attenuate; style 3-fid; stigma 2-lobed, reniform. Fruit oblong, 3-4.5 × 2-2.4 cm, base and apex obtuse. Seeds yellow-white, ovate, compressed, 3-4 × ca. 2.5 mm, smooth. Fl. and fr. May-Nov.
Home