[1] The Western Ghats tropical wet evergreen forests are classified into low-, medium-, and high-elevation types.
Clumps of bamboo occur along streams or in poorly drained hollows throughout the evergreen and semi-evergreen forests of south-west India, probably in areas once cleared for transportation agriculture.
The tropical vegetation of north-east India (which includes the states of Assam, Nagaland, Manipur, Mizoram, Tripura and Meghalaya as well as the plain regions of Arunachal Pradesh) typically occurs at elevations up to 900 metres (3,000 ft).
Evergreen forests are found in the Assam Valley, the foothills of the eastern Himalayas and the lower parts of the Naga Hills, Meghalaya, Mizoram and Manipur, where the rain fall exceeds 2,300 mm (91 in) per annum.
[5][better source needed] Tropical forests in India's east present a total contrast with the pine and coniferous woodland of the Western Himalayas.