The vegetation of Rajasthan follows its physical zones. On moving from west to east, the conditions of temperature, amount of rainfall and structure of soil also change at large. There is desert in the western part of Rajasthan in which arid and semi-arid vegetation is found due to high temperature, lack of rainfall and sandy soil.
The mountain vegetation is seen in the Aravalli range, while in the eastern plains of Rajasthan, the dense deciduous forests are seen due to the network of rivers, sufficient rainfall and fertile alluvial soil. On the other hand, there is excess humidity in the hilly regions of Mount Abu and hence dense evergreen forests are seen in this hilly area.
The types of forests change along with the amount of rainfall and temperature. As the amount of rainfall is increased, the dry and deciduous forests transform into evergreen forests. While moving from South to North and East to West, the form of forests keeps on changing into smaller and rarer.