The details of the tree which you are curious is Choerospondias axillaris लप्सी (Nepali hog plum). Its scientific name is Choerospondias axillaries . Similarly, it ranks as Species, belonging to the Family Anacardiaceae.

It is a common fruit in Nepal and Bhutan, called Lapsi and Aamli in Nepali Speaking community. Hog plum is a deciduous tree reaching 15–22 meters (49–72 feet) in height. The bark is deeply fissured. The plant typically drops most of its compound leaves before flowering. The drupe fruits are about 4 cm (1.6 inches) in length and have leathery yellow-green skin.

It is native to Nepal. It is extremely sour, even when fully ripe, and has a high vitamin Content. The fruit has a tough fibrous skin and pale yellow flesh, which is firmly attached to a large brown seed. The pulp is difficult to separate from the seeds, but once cooked it separates easily. The stony seeds (champati) are used as cooking fuel and some children play with the seeds like round marbles.

Hog plum is rich in iron at the same time it, Protects Against Heart Disease. In contrast, Plum might cause stomach issues like gas and diarrhea. If dried plums or pits are swallowed whole, they might block the intestines. The plump plant is a naturally growing plant It has mostly grown in the jungle. People are not willing to plant hog plum but it has high demand in the market.