Stem slender, glabrous, rooting as it climbs. Leaves glabrous; petiole 1 1/2–6 in. long, slender, terete, channelled down the face, with a very broad sheath 2–3 lin. long; blade 4 1/2–9 in. long, 1 3/4–4 in. broad, elliptic-oblong, acuminate, hastate-sagittate at the base, contracted just above the diverging falcate-oblong obtuse basal lobes, which are 1 1/4–2 1/4 in. long and 1/2–1 in. broad. Peduncle 1 1/2–2 1/4 in. long, glabrous. Spathe 1 3/4–2 1/4 in. long, oblong, convolute at the base; limb boat-shaped, obtuse, glabrous, green. Spadix 1 3/4–2 in. long, cylindric; female part about 1/4 in. long. Ovary subcylindric or shortly and broadly conical, 1-celled; stigma peltate, very large, umbrella-shaped, completely hiding the ovary from above.
