Stem climbing; internodes 3/4–1 1/4 in. long. Leaves subcoriaceous; petioles long-sheathed, 4 in. long; blade 8–10 in. long, 2 in. broad, obliquely lanceolate, slightly falcate, curved at the apex, very unequal-sided, one side being twice as broad as the other; primary lateral nerves making a very acute angle with the midrib, ascending, slightly prominent in the dried state. Peduncle about 4 in. long. Spathe 1 3/4 in long, 3/4 in. broad, oblong, long-acuminate, orange. Spadix a little shorter than the spathe; female part 2 1/2 lin. long. Male part nearly 1 1/4 in. long. Ovary sub-hemispherical; stigma sessile, broad, deeply excavated.