Vines. Stems terete, sulcate, glabrous; branches longitudinally striate, retrorsely puberulent. Petiole usually shorter, rarely longer, than lamina, retrorsely puberulent; leaf blade peltate, triangular-cordate, 3-9 × 2.5-8 cm, papery, abaxially pubescent, adaxially puberulent, base shallowly cordate, truncate, or slightly protruding, margin entire or sparsely serrate, apex mucronate, with a mucronate acumen, palmately 5-7-veined, fine reticulation dense. Inflorescences axillary, 1-3 per axil, cymose or narrow, thyrsoid, and racemelike, usually shorter, rarely longer, than leaves; rachis appressed puberulent; branches very short, 2-to few flowered; bracts ovate-rhombic, sharply acuminate, puberulent abaxially. Male flowers: sepals 4 or 5, connate at base, obovate or spatulate, 0.6-1.3 × 0.6-1 mm, mucronate, pilose abaxially; petals 4(or 5), opposite to sepals, oblong to rotund, minute, sometimes absent, ca. 0.5 mm; synandrium ca. 1.5 mm, anthers 4. Female flowers: sepals 2, elliptic to rotund, base slightly thick and concave, ca. 1.5 mm, apex obtuse or slightly mucronate, puberulent abaxially; petal occasionally 1, minute; ovary saccate-obovoid, ca. 1 mm, glabrous or pubescent, stigma 3-lobed. Drupes obovate-rounded, ca. 5 mm in diam., glabrous or sparsely spreading pubescent; endocarp abaxially bearing 3 rows of tubercles. Fl. summer.
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Slender climber. Stems sparingly long-pubescent with short hairs also present, at least on young parts. Leaves with petioles 3-11 cm inserted 1-2 mm from basal margin; lamina deltoid-ovate to reniform, 6.5-10 by 6-12 cm, palmately 7-8-nerved, base broadly to deeply cordate, apex broadly acuminate to broadly obtuse, upper surface sparsely hairy with lax reticulation, lower surface rather sparsely long-pubescent, hairs more dense along the nerves, thinly papyraceous. Inflorescences axillary, narrowly thyr-soid up to 18 cm long (female shorter) with lower lat-eral branches up to 2 cm long, puberulous. Male flowers with pedicels 0.5 mm long; sepals 4-5, joined at base, ovate, 2 mm long, sparsely pubescent; petals united into a cup-shaped corolla 1 mm long; synandrium 1.5 mm long. Female flowers: sepals 2, elliptic, 0.5 mm long; petals 2, rotund, 0.25 mm long; carpel glabrous or sparsely hispid, scarcely 1 mm long, short style with divaricately 3-lobed stigma. Drupes pink, subrotund in outline, 5 mm diam., sparsely hispid; endocarp dorsally and laterally set with 6 rows of short blunt angular points, c. 18-20 per row, with a small slit-like aperture on both lateral faces.
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