Dioscorea calcicola Prain & Burkill

Underground parts unknown. Plant glabrous. Stem wiry, terete, possibly entirely unarmed. Bulbils not seen. Leaves firm, narrow, broadest at the horizon of the insertion of the petiole which, as they are rounded or only just cordiform at the base, means that they taper almost from the base to pass very gradually into the little defined acumen, 12 by 1½ cm; upper surface smooth and shining; petiole to 2-2½ cm long. Male flowering axes 1-2 together on very short leafless branches from the upper leaf-axils, branches attaining no more than the mid-length of the axillant leaf; axis very red when dry, to 4 cm in length, with about 50 flowers spaced their own diameter apart. Buds slightly elongated, 1 mm long. Female flowering axes though short, rather stout and rigid, solitary, with up to 10 flowers, ridged. Capsules bunched close to the axil, only 1-3 to an infructescence, apex retuse; base almost truncate; wings 12-14 by 9-10 mm; stipe 1-2 mm long.

It is a tropical plant. It grows on limestone from sea level to 200 m above sea level.