Tubers 1 or perhaps 2, descending into the soil but not very deeply, flesh red to pink, fibrous in the upper parts. Stem wiry, unarmed, faintly ridged, rooting at times from lower nodes that happen to lie on sufficiently moist soil. Leaves alternate, coriaceous, lanceolate-ovate, to 16 by 5 cm on the mature plant, not much less on plants that are not quite mature but of a different shape being auricled at the base (Fig. 10), 5-nerved, the outer nerve submarginal, the intermediate nerve as near to the margin as to the midrib; upper surface dull with the larger nerves slightly prominent, lower surface shining, smooth but with the larger nerves raised; petiole rather short, between ⅓ and ¼ of the length of the lamina. Male flowering axes usually on leafless branches or branch-ends, but occasionally spikes are found in the axils of assimilating leaves, to 7 cm long, angled, with 40-60 flowers spaced their own diameter apart. Buds slightly longer than globose. Female flowering axes 1-2 together to 10 cm long or a little more. Capsules relatively large, wings to 27 by 24 mm, apex of capsule retuse, base obtuse.
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A yam. It keeps growing from year to year by sprouting from the tubers. It is a slender plant. The vines do not have thorns and they twine to the right. There are 1-2 tubers which do not go very deeply into the soil. The flesh is pink or red. The leaves are simple and alternate. They are rough. The leaf stalk is less than half the length of the blade. The leaf blade is oval to sword shaped but varies. The leaf can be 16 cm long by 5 cm wide. The male flowers curve upwards. They can be 7 cm long with 40-60 flowers without stalks. The male flowers have a scent. The female flowers occur as 2 together and are 10 cm long. The flowers have a smell of benzoin.
Plentiful in the mountains, particularly the Main Chain, 0-1200 m. Fl. irregularly, flowers strongly benzoin-scented.
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A tropical plant. It grows in the mountains in Peninsula Malaysia. It grows up to 1200 m altitude.
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