Kalo bhatmas, black soybeans
Binomial name Glycine max
Some famous dishes of Nepal made from black soybeans are samay baji, bhatmas sadheko, gundruk ra bhatmas etc.
More external links –
https://www.verywell.com/where-to-get-black-soy-beans-2242293
http://www.doctoroz.com/slideshow/black-soybean
http://medusanews.com/articles/black-soybeans-benefits-and-harms-doctor-review/