Why this matters now
Forest types are tested for their rainfall zones, characteristic species and locations, and they underpin GS-3 themes of forest conservation, carbon sinks and the India State of Forest Report. The contrast between evergreen, deciduous and thorn forests maps neatly onto India’s rainfall gradient.
Tropical evergreen & semi-evergreen
Found in the very high-rainfall zones (above ~200 cm) — the Western Ghats, the North-East and the Andaman & Nicobar Islands. These are dense, multi-layered, “evergreen” (no fixed leaf-shedding season) forests with hardwoods like rosewood, mahogany and ebony.
Tropical deciduous (monsoon) forests
The most widespread forests of India, in the 70-200 cm rainfall belt. Trees shed leaves in the dry season to conserve water. Two sub-types:
- Moist deciduous (100-200 cm) — dominated by teak and sal;
- Dry deciduous (70-100 cm) — teak, sal, and species merging into scrub at the drier margin.
Thorn forests and montane forests
Tropical thorn forests and scrub occur in the arid zones (below ~70 cm) — Rajasthan, parts of Gujarat, Punjab, Haryana and the Deccan interior — with hardy species like acacia (babool), khejri and cacti.
Montane forests follow altitude in the Himalayas — from wet temperate and coniferous (pine, deodar, fir, spruce) to alpine meadows and shrubs above the tree line.
Littoral & mangrove forests
Mangrove (tidal) forests grow in the saline, waterlogged coasts and deltas. India’s largest is the Sundarbans (Ganga-Brahmaputra delta) — home of the sundari tree and the Royal Bengal Tiger. Mangroves are vital coastal protection (against cyclones and erosion) and carbon sinks (“blue carbon”).
UPSC angle
Map forest types to rainfall (evergreen >200, deciduous 70-200, thorn <70) and species (teak/sal = deciduous; sundari = mangrove). Remember deciduous (monsoon) forests are the most widespread.
Frequently asked questions
What is the Champion & Seth classification?
The standard classification of Indian forests by Champion and Seth, grouping them by climate and vegetation into types such as tropical evergreen, tropical deciduous, thorn, montane, and littoral/mangrove.
Which is the most widespread forest type in India?
Tropical deciduous (monsoon) forests, found across the 70-200 cm rainfall belt — dominated by teak and sal.
Where are tropical evergreen forests found?
In the highest-rainfall zones (above ~200 cm) — the Western Ghats, the North-East, and the Andaman & Nicobar Islands.
What are mangrove forests and where is India’s largest?
Salt-tolerant tidal forests of coasts and deltas; India’s largest is the Sundarbans in the Ganga-Brahmaputra delta, home of the sundari tree.