Dioscorea belophylla

Dioscorea belophylla (Prain) Voigt ex HainesForest Fl. Chota Nagpur 530 1910. (Syn: Dioscorea nummularia var. belophylla Prain; Dioscorea sagittata Royle);
spear-leaved dioscorea • Bengali: chupri alu • Hindi: तुरर turar • Kannada: ಕಾದು ಗೆಣಸು kaadu genasu • Marathi: जंगली मटोळ jangli matol, कडु कंद kadu kand, नंद कंद nand kand • Sanskrit: शङ्खालुका sankhaluka;
Dioscoreaceae (yam family) » Dioscorea belophylla
Synonym: Dioscorea glabra
dy-oh-SKOR-ee-uh -- named for Pedanios Dioscorides, 1st century Greek pharmacologist
bel-oh-FIL-uh -- spear or arrow-like leaves
Native of: India, Pakistan
Edible use (WILD):
... tubers (as VEGETABLE) ... ... tribal folks of Melghat Forest ... ethnoleaflets <http://www.ethnoleaflets.com/leaflets/edibles4.htm

SK 2226 16 October 2019 : 11 posts by 4 authors. Attachments (2)- around 900 kb each. 
Location: Chalnakhel, kathmandu, Nepal
Altitude: 1570 m.
Date: 14 September  2019
Habit : Wild

Long leaf in Dioscorea bulbifera
Could be but not sure! Images not so good.
I may be an optical illusion being side views. would be nice to have some enface views
It was also on a edge of the road beyond reach !
I also more inclined towards it after going through comparative images and other closely related species. Leaf venation and aerial bulbils appear close.
Flora of China states that leaves alternate, simple; petiole 2.5--5.5 cm; leaf blade broadly cordate, 8--15(--26) × 2--14(--26) cm, glabrous, margin entire or slightly undulate, apex caudate-acuminate.
Flora of Pakistan states that leaves alternate, 4-5 cm long, 2.5-13.5 cm broad, ovate, more or less deeply cordate at the base, long acuminate, 9-nerved, petiole 2.5-12 cm long.
GBIF gives 8017 occurrences (showing how common it is). 

Also check the following species as per keys in Flora of Pakistan:

2 (1)Stem twining anticlockwise. Leaves opposite Dioscorea belophylla
+Stem twining clockwise. Leaves alternate (3)
3 (2)Leaves glabrous on both sides. Female spikes in clusters, many flowered. Capsule longer than broad. Seeds winged at the base Dioscorea bulbifera
+Leaves glabrous above, pubescent along the veins and the veinules beneath. Female spikes solitary few-flowered. Capsule broader than long. Seeds Winged all round Dioscorea deltoidea

Leaves appears to be opposite ? is it so ? If so, pl. check Dioscorea belophylla

Yes, opposite leaves. ... is exactly on the mark. 
I guess ... is right and listed in Nepal !
Dioscorea belophylla (Prain) Voigt ex Haines

SK 2237 22 October 201 : 4 posts by 2 authors. Attachments (4)- 1mb or more. 
Location: Naichal, Gundu, Bhakltapur 
Date: 15 September 2019
Elevation: 1862 m.
Habit : Wild
Dioscorea belophylla (Prain) Voigt ex Haines ??

Attachments (1)- 3 mb.  

Attachments (1)- 6 mb.

I guess ID is correct !
Yes. Appears so as per images at SK 2226 16 October 2019