• Natural vegetation refers to a plant community, which has grown naturally without human aid and has been left undisturbed by humans for a long time. • The following major types of vegetation may be identified in our country: • Tropical Evergreen Forests • Tropical Deciduous Forests • Tropical Thorn Forests and Scrubs • Montane Forests • Mangrove Forests Tropical evergreen forests: • Tropical evergreen forests have trees that always have leaves and have a shade look. • They always receive heavy rainfall i.e greater than 200 cm. • The temperature that is maintained is between 20-27o C. • The trees reach great heights up to 60 metres or even above. • These are generally found in the Western Ghats, Andaman, and Nicobar, North East Area. • Examples of tropical evergreen are Rubber, Beetle Nut, Jamun, Mango, Roseberry, and Bamboo. • These forests have a multilayered structure with trees, shrubs and creepers. • There is no definite time for trees to shed their leaves. • As such, these forests appear green all year round. Semi-evergreen forests: • Semi-evergreen forests are found in the Western Ghats, Andaman and Nicobar Islands, and the Eastern Himalayas. • Such forests have a mixture of wet evergreen trees and moist deciduous trees. • The forest is dense and is filled with a large variety of trees of both types. Thus, tropical evergreen and semi-evergreen forests are located in the Northern Eastern States. +--------------------+--------------------+ | Type of Forest | Rainfall | +--------------------+--------------------+ | Tropical Evergreen | above 200 cm | | Tropical Deciduous | between 100-200 cm | | Dry Deciduous | between 70 -100 cm | | Tropical Thorn | less than 50 cm | | Moist Deciduous | between 100-200 cm | +--------------------+--------------------+