Climbing shrub to 4 m, densely prickly. Young stems terete, sparsely stellate-pubescent and densely prickly, with porrect, sessile trichomes, the rays 6-8, 0.1-0.15 mm long, the midpoints elongated to 0.5-1 mm, occasionally reduced, also with minute simple hairs, the prickles 1.5-3 mm long, 1-2.5 mm wide at base, curved, conical to flattened, brown, glabrous, spaced 2-5 mm apart; bark of older stems glabrescent, brown to red-brown.
Sympodial units difoliate, geminate or not geminate.
Leaves lobed, the blades 6-14 cm long, 4.5-9 cm wide, ca. 2 times longer than wide, elliptic, membranous to chartaceous, drying concolorous to weakly discolorous, yellow-green to green-brown; adaxial surface sparsely stellate-pubescent, with trichome midpoints to 1 mm long; abaxial surface sparsely stellate-pubescent with porrect, sessile trichomes, the rays ca. 8, 0.1-0.25 mm long, the midpoints 0.3-1 mm long, with over 20 prickles on both surfaces; the primary veins 3-5 pairs, the tertiary venation visible on both surfaces; base cuneate; margins lobed, the lobes 2-5 on each side, 1-1.7 cm long, extending 1/4-1/3 of the distance to the midvein, deltate, apically acuminate; apex acuminate; petiole 1.2-6 cm long, 1/4-1/2 of the leaf blade length, weakly to moderately stellate-pubescent, with 2-10 prickles.
Inflorescences apparently lateral, 2-3 cm long, unbranched, with 1-4 flowers, 1(-2) flowers open at any one time, sparsely stellate-pubescent, with 0-5 prickles; peduncle 0-5 mm long; pedicels 0.9-1.3 cm long, gently curved, articulated at the base, moderately stellate-pubescent, with 0-5 prickles; pedicel scars spaced 2-7 mm apart.
Flowers 5-merous, heterostylous and the plants andromonoecious, with the lowermost 1-2 flowers long-styled and hermaphrodite, the distal flowers short-styled and staminate. Calyx 3-4 mm long, moderately stellate-pubescent, with 0-10 prickles, the lobes 1-2 mm long, deltate, apically acuminate. Corolla 1.3-1.6 cm in diameter, white, stellate, lobed for 2/3-3/4 of the way to the base, the lobes 5-6.5 mm long, 2.5-3.5 mm wide, deltate, spreading, moderately stellate-pubescent abaxially, the trichomes porrect, sessile, the rays 5-8, 0.1-0.2 mm long, the midpoints shorter than the rays. Stamens equal, with the filament tube ca. 1.5 mm long, the free portion of the filaments 0.4-0.6 mm long; anthers 4-4.5 mm long, connivent, tapering, poricidal at the tips. Ovary glabrous, with a few stellate trichomes towards the apex; style 0.55-0.75 cm long in long-styled flowers, stout, straight, stellate-pubescent for most if its length.
Fruit a spherical berry, 1(-2) per infructescence, 2-2.5 cm in diameter, the pericarp smooth, evenly green when young, yellow at maturity, glabrous; fruiting pedicels 2.5-3.5 cm long, 10-13 mm in diameter at base, woody, pendulous, with 2-10 prickles; fruiting calyx lobes not elongating, less than 1/6 the length of the mature fruit, with 0-10 prickles.
Seeds ca. 15-20 per berry, 5.5-6 mm long, ca. 4.5 mm wide, flattened-reniform, dull yellow to orange-brown.