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 Link Express Thar Link Express Thar Link Express () is the Indian portion of the international passenger train Thar Express operated weekly by Indian Railway using its own coaches and locomotives, between Jodhpur and Munabao. Passengers from Munabao then clear customs and are transported to across the border to Zero Point station where the Thar Express takes passengers to Karachi, Pakistan. The track between Barmer, forming part of the then Jodhpur princely State, and Shadi Palli in Sindh, on which the current Thar Link Express runs, was opened in December 1900 to run the Sind Mail, which ran between Bombay and Karachi