Thar Desert natural vegetation of this dry area is classed as Northwestern thorn scrub forest occurring in small clumps scattered more or less openly. Density and size of patches increase from west to east following the increase in rainfall. The natural vegetation of the Thar Desert is composed of the following tree, shrub and herb species: The endemic floral species include "Calligonum polygonoides", "Prosopis cineraria", "Acacia nilotica", "Tamarix aphylla", "Cenchrus biflorus". The Thar Desert is the most widely populated desert in the world, with a population density of 83 people per km. In India, the inhabitants comprise Hindus, Muslims, and Sikhs. In
Thar Desert the Sarasvati River to the west of the Kurukshetra plain, which contained a lake known as Kamyaka. The Kamyaka forest is mentioned as being situated at the head of the Thar desert, near Lake Trinavindu. The Pandavas, on their way to exile in the woods, left Pramanakoti on the banks of the Ganges and went towards Kurukshetra, travelling in a western direction and crossing the Yamuna and Drishadvati rivers. They finally reached the banks of the Sarasvati River where they saw the forest of Kamyaka, the favourite haunt of ascetics, situated on a level and wild plain on the banks