Identification of this dioscorea species requested : 4 posts by 3 authors. Attachments (2)

Dear all please help me in the identification of this wild dioscorea; leaves thin coriaceous, basal nerves 7, petiole 2-4 cm long, igmented at pulvinii, 4-8 cm  wide and long, almost orbicular, base rounded, no bulbils found, entire plant almost glabrous;  roots tuberous deep in the rocks.

Dioscorea species in efi with details & keys etc.