Scandent herb. Stem up to 3.6 cm diam. flowering internodes 3-5 cm or even longer. Cataphylls 31 cm long falling early. LEAVES: Petioles subterete but adaxially flattened-convex, near the apex more or less 3-angular, 37-44 cm long, 1.3 cm thick at halfway, becoming reddish at apex, sheathed part 4.5-8 cm long, one side of the sheath near the apex up to 2.2 cm wide. Leaf blade perpendicular from the petiole, coriaceous, ovate-triangular in outline, up to 43-59 cm long, 18-25.5 cm wide, obtuse towards the apex, the apex itself acuminate, (2 cm), subsagittate towards the base with posterior lobes, apices obtuse, separated by a deep parabolic sinus, on the outer margins of the lobes, one strongly concave, the other convex. Primary lateral veins 6-7 on both sides, departing about 65-80º, reddish abaxially, minor veins all subparallel. INFLORESCENCES up to 5. Peduncles 7.5-9 cm long. Spathe 14-15.5 cm long, tube 7 x 2-2.3 cm, externally carmine red, blade green at the top, ivory/carmine-suffused or -punctate; inside tube deep cherry-coloured, continuing to the base of the blade upwards, the blade ivory. Spadix subequal to the spathe. Stipe pink, 0.3 cm at the back, 0.8 cm at the front; female zone 4.2 cm long, sterile male zone 1.2 cm long, fertile zone 6.5 cm long. Pistillate flowers: ovaries 6-7 locular, locules uniovulate. Staminate flowers 4-3-androus.