Vines; stems slender, glabrous. Leaves 5-foliolate, sometimes the two lateral lobes slightly joined at the base and the leaves 3-foliolate, the blade suborbicular in outline, 2-4 cm wide and long, the leaflets lanceolate, the lateral leaflets often pedately lobate, the margins coarsely crenate-serrulate, the apex acute, mem-branaceous, the upper surface scabrellous, the lower surface glabrate; petiole 2-5 cm long, slender; tendrils simple. Staminate flowers axillary, elongate-paniculate; rachis 15-25 cm long, slender, flowered only on the upper half, the flowers often in subumbelloid clusters; pedicels 3-6 mm long, filiform; calyx shallowly capulate, 3-5 mm wide, greenish-white, the lobes minute, subulate; corolla ca. 6 mm in diameter, the white or cream lobes 2.0-2.5 mm long, lanceolate, the outer surface glabrous, the inner surface slightly papillate, 3-nerved; androecial head subsessile, 0.5-1.0 mm in diameter. Pistillate flowers solitary, in same axis as the staminate flowers; peduncles 2-15 mm long; calyx and corolla as in the staminate flowers but slightly smaller; ovary obliquely ovoid, rostrate, ca. 2 mm long; setose, the stigma subglobose. Fruits greenish, obliquely ovoid, 1.5-2.0 cm long, explosively debiscent, the seta 5-7 mm long; in outline, 2-4 cm wide and long, the leaflets lanceolate, the lateral leaflets often seeds grayish brown, ovoid, compressed, the margin irregularly appendaged.
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Stems glabrous except for minutely villosulous nodes; tendrils 2-branched, rarely (shortest tendrils) unbranched. Leaves 3-foliolate, lateral pair of leaflets deeply divided, petiolules 3–5 mm, terminal leaflet 3–4.5 cm, blade broadly lanceolate, petiolule 7–15 mm, linear, abruptly broadening into leaflet base, leaflet margins coarsely serrate to shallowly or deeply lobed; petioles 10–21 mm. Staminate inflorescences 5–11 cm, floriferous portion 3–7 cm, (50–)65–90(–130)-flowered, paniculate-racemoid, lateral branches 3–25 mm, longest proximally; flowers solitary, in fascicles of 2–4, or along short axes. Staminate corollas 3.5–4.9 mm diam. Anther heads 0.6–0.8 mm diam., subsessile, glabrous. Fruiting peduncles 4–6 mm. Capsules narrowly ovoid, slightly oblique, short-beaked, 15–25 mm, spinules 3–4 mm.
A pumpkin family herb. It is a vine. The tendrils have 2 branches. The leaves have 3 leaflets. The side pair of leaflets are deeply divided. The end leaflet is 3-5 cm long. There are coarse teeth along the edges of the leaflets. The fruit capsule is narrowly oval and 15-25 mm long.