Vigorous vine, glabrous except for pistil and stamens. Shoots slightly angular. Lvs deeply 3-lobed, but entire on young plants; petiole 1-3 cm long, with 2 sessile glands near apex; stipules 10-15 mm long, linear-subulate, entire; lamina lobes ± elliptic, submembranous, deep shining green above, rounded at base; middle lobe largest, 6-10 × 3-5.5 cm, serrate or serrulate, obtuse to acute. Fls ☿, solitary. Pedicels 4-6 cm long at flowering. Bracts 1.5-2 cm long, ovate, free, coarsely serrate. Hypanthium inconspicuous. Sepals 2.5-3 cm long, oblong, green on reverse, white inside; petals white, similar to sepals; corona threads 2-2.5 cm long, white with purple base. Filaments puckered, purple towards base, otherwise white; anthers 8-10 mm long, > filaments. Ovary puberulent. Fr. 5-6.25 × 4.75-5.75 cm, broad-ellipsoid or subglobose, dull purple; pulp orange, sweet. Seed c. 5 mm long, ovate, black, pitted.