Stem scandent. LEAVES: Petiole slender, 12-18 cm long, with a broad persistent sheath almost up to the base of the blade, apex extended, long-auriculate and somewhat overtopping the base of the blade. Blade thinly coriaceous, oblong-ovate, apex acuminate, base obtuse, somewhat oblique, one side ca. 1/5 wider than the other, 16-20 cm long, up to 10 cm wide, primary veins 14-18, spreading from the midrib at an obtuse angle, barely more distinct than secondary or tertiary veins. INFLORESCENCE: Peduncle terete, 4-5 cm long. Spathe oblong, apex long and thinly cuspidate-acuminate, 10-12 cm long, convolute up to 2 cm wide. Spadix narrowly cylindric, obtuse, 6-7.5 cm long; female zone somewhat shorter and thicker than the male zone. Pistils prismatic somewhat narrowing upwards.