Stem scandent, thick, internodes short. LEAVES: Petiole robust, smooth, rather terete, or somewhat flattened above, 60-70 cm long; Blade coriaceous, broadly cordate-ovate, 50-80 cm long, 40-60 cm wide, posterior lobes broadly semi-ovate or obliquely semi-orbicular, slightly introrse, 13-18 cm long, 20-28 cm wide, separated by a deep parabolic sinus; anterior lobe ca. 4 times longer than the posterior lobe, narrowing in a slightly arcuate line towards the apex, eventually apiculate, midrib strong, flat on upper side, primary lateral veins thick, 3 basal ones joined together into a short posterior rib which is denuded for ca,. 3 cm in the sinus, 2 free basal veins, 5 costal veins distant from each other, spreading openly from the midrib, curving upwards, disappearing near the margin, secondary lateral veins more slender than the primary veins. INFLORESCENCE: Peduncle 3-4 cm long, 1.5 cm thick. Spathe tube purple or ochre-yellow in fruit, oblong, internally blood-red, 6-8 cm or 1 cm longer in fruit, blade pale green, becoming ochre-yellow, sub-lanceolate, convolute, apex acuminate, 10-14 cm long, 4-5 cm wide. Spadix sessile, female zone thick, cylindric, 3-4 cm long, 2-3 cm thick when flowering, in fruit 6-7 cm long, 3.5-4 cm thick; male zone yellowish-white, elongate-conoid, sterile part 4 cm long, 2-3 cm thick, fertile part curved forward above the sterile part, 10 cm long, 1.8 cm wide. Pistil obovoid, 3 mm long, stigma discoid, orbicular, 4-6-locular, ovules biseriate, almost up to the apex. INFRUCTESCENCE: Berries orange, oblong-cylindric, longitudinally sulcate, 6-7 mm long, 2 mm thick, seeds yellowish, rather thickly strophiolate [banded], barely 1 mm long.