Vigna nepalensis Tateishi & Maxted, Kew Bull.57: 629 (2002);
Central & E. Himalaya: Central & E. Himalaya as per POWO;
SK 3637 17 September 2022: 10 images- 8 very high res.
latest checklist for Vigna sp. for Nepal!
Pl. check Vigna nepalensis as per
Looks close but I am not so sure. Elevation difference is about 1250ft.
The link I have given states distribution as East Nepal, India (Sikkim, Darjeeling and Assam) (Tateishi, 1985).
Darjeeling is at around the posted elevation and may be Sikkim also.