Forest Types of India
Indian forest types for UPSC — rainfall ranges, regions and trees of evergreen, deciduous, thorn, montane and mangrove forests, plus forest cover.
SyllabusGS I · Changes in critical geographical features and in flora and fauna and the effects of such changes; physical geography of India
Prerequisites: Indian Climate and the Monsoon · Biogeography and Soils
The Hook: Why Bring Cheetahs to Kuno?
On 17 September 2022, eight cheetahs flown in from Namibia were released into Kuno National Park in Madhya Pradesh under Project Cheetah — seventy years after the cheetah was declared extinct in India in 1952. A second batch of twelve came from South Africa in February 2023.
Why Kuno, and not the Western Ghats or the Sundarbans? A cheetah needs open grassland, scrub and dry deciduous woodland with plenty of prey — not dense, wet evergreen forest. The choice raises the question this page answers: what kind of vegetation grows where in India, and why?
The Core Concept
Natural vegetation is the plant community that has grown naturally, without human help, and has adjusted to the climate and soil of a place over a long time. “Forest” in government records means land legally recorded as forest; “forest cover” means land actually under tree canopy — the two are not the same.
What decides the vegetation?
| Factor | Effect |
|---|---|
| Rainfall | The master control in India — the amount and length of the rainy season decide evergreen vs deciduous vs thorn |
| Temperature | Falls with altitude, producing zones from tropical to alpine on mountains |
| Relief | Windward slopes are wetter; altitude creates vertical zonation |
| Soil | Saline, marshy soils give mangroves; sandy soils give thorn scrub |
| Photoperiod | Longer summer days favour faster growth |
Indian forests were classified by H.G. Champion and S.K. Seth (1968) into 16 major type groups. For UPSC, NCERT’s five broad groups are enough.
The five broad forest types
graph LR
A[More than 200 cm] --> B[Tropical evergreen and semi-evergreen]
C[100 to 200 cm] --> D[Tropical moist deciduous]
E[70 to 100 cm] --> F[Tropical dry deciduous]
G[Less than 50 cm] --> H[Tropical thorn and scrub]
I[Altitude] --> J[Montane: subtropical to alpine]
K[Tidal coasts and deltas] --> L[Littoral and swamp: mangroves]| Type | Rainfall (NCERT) | Where | Characteristic trees | Features |
|---|---|---|---|---|
| Tropical evergreen | More than 200 cm | Western slopes of the Western Ghats, hills of the north-east, Andaman and Nicobar Islands | Rosewood, mahogany, ebony, aini | Dense, multi-layered; trees up to 60 m; no fixed season of leaf fall, so evergreen |
| Tropical semi-evergreen | Slightly less rainy parts of the same regions | Mixture of evergreen and moist deciduous | White cedar, hollock, kail | Transitional |
| Tropical moist deciduous | 100–200 cm | North-eastern States along the Himalayan foothills, eastern slopes of the Western Ghats, Odisha | Teak, sal, shisham, hurra, mahua, amla, semul, kusum, sandalwood | Shed leaves in the dry season; commercially valuable timber |
| Tropical dry deciduous | 70–100 cm | Rainier parts of the Peninsular plateau, plains of Bihar and Uttar Pradesh | Teak, sal, peepal, neem | Open “parkland” landscape in drier parts |
| Tropical thorn | Less than 50 cm | South-west Punjab, Haryana, Rajasthan, Gujarat, parts of Madhya Pradesh and Uttar Pradesh | Babool, ber, wild date palm, khair, neem, khejri, palas | Scattered trees, long roots, thorns and small leaves to save water; tussocky grass |
| Montane | Varies with altitude | Himalayas; higher hills of the south | See below | Vertical zonation |
| Littoral and swamp | Tidal and wetland areas | Deltas of the Ganga–Brahmaputra, Mahanadi, Godavari, Krishna and Kaveri; Andaman and Nicobar coasts | Sundari (mangroves), rhizophora | Salt-tolerant; breathing roots (pneumatophores) |
Note: NCERT’s Class XI text gives less than 50 cm for thorn forests, while its Class IX text uses less than 70 cm. Read the options carefully — UPSC tests the gradient, not a single threshold.
Montane forests — vegetation by altitude
Himalayas (roughly bottom to top):
| Zone | Vegetation |
|---|---|
| Foothills | Tropical moist deciduous forest (sal) |
| About 1,000–2,000 m | Wet temperate evergreen broad-leaved forests — oak and chestnut |
| About 1,500–3,000 m | Temperate coniferous forests — pine, deodar, silver fir, spruce, cedar |
| Higher altitudes | Alpine forests — silver fir, juniper, pine, birch, rhododendron; then alpine grasslands (bugyals in Uttarakhand, margs in Kashmir) used for seasonal grazing |
| Highest | Mosses and lichens, then snow |
Southern hills: in the higher reaches of the Western Ghats — the Nilgiri, Anaimalai and Palani hills — patches of stunted evergreen forest called shola grow in sheltered valleys, surrounded by rolling grasslands (the shola–grassland complex). Magnolia, laurel, cinchona and wattle are found here.
Mangroves — the land–sea frontier
- Grow in the intertidal zone of sheltered coasts, estuaries and deltas, where fresh and salt water mix.
- Adaptations: salt tolerance, stilt and prop roots, pneumatophores (breathing roots), and viviparous seeds that germinate on the tree.
- Functions: shield coasts from cyclones and storm surges, trap sediment, act as fish nurseries and store large amounts of “blue carbon”.
- The Sundarbans in the Ganga–Brahmaputra delta is the largest mangrove forest in the world and is named after the sundari tree. Other major Indian mangroves: Bhitarkanika (Odisha), the Godavari–Krishna deltas, Pichavaram (Tamil Nadu), and the Andaman and Nicobar Islands.
Forest cover and policy
| Item | Fact |
|---|---|
| National Forest Policy, 1988 | Goal: one-third of the geographical area under forest or tree cover (two-thirds in the hills) |
| India State of Forest Report 2023 (Forest Survey of India, released December 2024) | Forest and tree cover together: 25.17% of the geographical area (forest cover 21.76%, tree cover 3.41%) |
| Largest forest cover by area | Madhya Pradesh (ISFR 2023) |
| Survey body | Forest Survey of India, Dehradun — reports every two years |
Wildlife: the conservation framework in brief
- India is one of the world’s megadiverse countries; it has about 2.4% of the world’s land area but around 7–8% of recorded species (MoEFCC).
- Parts of four global biodiversity hotspots fall in India: the Himalaya, Indo-Burma, Western Ghats and Sri Lanka, and Sundaland (Nicobar Islands).
- Wildlife (Protection) Act, 1972 — legal basis for protected areas and schedules of species.
- Project Tiger (1973) and Project Elephant (1992).
- All India Tiger Estimation 2022 (NTCA and Wildlife Institute of India): a minimum of 3,167 tigers, with a later average estimate of 3,682.
See Protected Areas and Wildlife for national parks, sanctuaries and biosphere reserves.
Memory Anchors
Rainfall ladder: “200 → 100 → 70 → 50” → above 200 evergreen · 100–200 moist deciduous · 70–100 dry deciduous · below 50 thorn.
Evergreen trees: “Rich Men Eat Apples” → Rosewood · Mahogany · Ebony · Aini.
Thorn forest trees: “Babool Ber Khejri Khair” — all survive in the dry north-west.
Comparison: Shola = stunted evergreen patches + grassland in the southern hills; bugyal = alpine meadow in Uttarakhand; marg = alpine meadow in Kashmir.
One-line Mains hook: “Forests are not timber stocks but water towers, carbon sinks and homes” — use it to widen any forest answer beyond area statistics.
For Prelims
- Tropical deciduous (monsoon) forests are the most widespread forests of India.
- Evergreen forests need more than 200 cm rain; thorn forests grow where rain is less than 50 cm (NCERT).
- Teak and sal belong to deciduous forests; rosewood, ebony and mahogany to evergreen forests.
- Shola forests — Nilgiri, Anaimalai and Palani hills.
- The Sundarbans is named after the sundari tree.
- National Forest Policy 1988 target: 33% of the geographical area (66% in hills).
- ISFR 2023: forest and tree cover = 25.17% of India’s geographical area.
For Mains
- Dimensions: ecological (biodiversity, water regulation, soil conservation, carbon sink); economic (timber, non-timber forest produce, tourism); social (forest-dwelling communities, Forest Rights Act 2006); climate (mitigation and adaptation, NDC carbon-sink goal); disaster (mangroves against cyclones).
- Keywords: vertical zonation, ecotone, canopy density, open forest, blue carbon, ecosystem services, invasive species (such as Lantana), fragmentation, community forest management.
- Value-addition: Champion and Seth (1968) classification; National Forest Policy 1988’s one-third goal; ISFR 2023 figures; Project Cheetah at Kuno (2022) as an example of habitat-matching in reintroduction; mangroves as natural cyclone barriers on the east coast.
Common Traps
In the News
- September 2022 — cheetahs from Namibia released in Kuno National Park under Project Cheetah.
- December 2024 — India State of Forest Report 2023 released; forest and tree cover at 25.17% of the geographical area.
- March 2024 — in M.K. Ranjitsinh v. Union of India, a case on protecting the critically endangered Great Indian Bustard from power lines, the Supreme Court recognised a right against the adverse effects of climate change. See Biodiversity and Conservation.
Practice
Prelims
Consider the following pairs:
| Tree | Forest type |
|---|---|
| 1. Mahogany | Tropical thorn forest |
| 2. Khejri | Tropical thorn forest |
| 3. Sundari | Littoral and swamp forest |
| 4. Deodar | Tropical moist deciduous forest |
How many of the pairs given above are correctly matched?
Solution
Pair 2 is correct — khejri is a thorn-forest tree of Rajasthan. Pair 3 is correct — sundari is the signature mangrove of the Sundarbans. Pair 1 is wrong — mahogany is a tropical evergreen tree. Pair 4 is wrong — deodar is a temperate coniferous (montane) tree of the Himalayas. So two pairs.
Answer: B
Consider the following statements about shola forests:
- They are found in the higher hills of the Western Ghats such as the Nilgiri, Anaimalai and Palani hills.
- They occur as forest patches surrounded by grasslands.
- They are a type of mangrove found in the backwaters of Kerala.
Which of the statements given above are correct?
Solution
Statements 1 and 2 are correct — sholas are stunted montane evergreen forests in sheltered valleys of the southern hills, forming a mosaic with grasslands. Statement 3 is wrong — sholas are high-altitude forests, not coastal mangroves.
Answer: A
Which one of the following is the most widespread forest type in India?
Solution
Tropical deciduous (monsoon) forests — moist and dry — cover the largest area, since most of India receives 70–200 cm of rain with a marked dry season. Evergreen forests are confined to very wet areas; thorn forests to the dry north-west and rain-shadow Deccan; montane forests to the mountains.
Answer: D
Mains
“Rainfall is the master control of natural vegetation in India, but relief and human use modify its pattern.” Discuss.
Solution
Introduction: India’s natural vegetation ranges from tropical evergreen forests to alpine meadows. The broad pattern follows rainfall, but altitude, soil and centuries of human use reshape it.
Body — rainfall as master control:
- Above 200 cm: tropical evergreen forests (Western Ghats, north-east, Andamans).
- 100–200 cm: moist deciduous (sal and teak belts of central and eastern India).
- 70–100 cm: dry deciduous; below 50 cm: thorn forests of Rajasthan and Gujarat.
Body — relief:
- Altitude creates vertical zones in the Himalayas — sal at the foothills, oak and chestnut, then conifers, then alpine meadows (bugyals, margs).
- Shola–grassland mosaics in the Nilgiris; rain-shadow scrub on the Deccan leeward of the Western Ghats.
- Saline tidal flats give mangroves in deltas irrespective of rainfall.
Body — human use:
- Clearing for agriculture (much of the Ganga plain and Terai); shifting cultivation in the north-east.
- Plantations of teak and eucalyptus; invasive species such as Lantana.
- Mining and dams fragment forests; fire and grazing degrade them.
- Conservation reverses some losses — ISFR 2023 puts forest and tree cover at 25.17% of the geographical area, still below the 1988 policy goal of one-third.
Conclusion: Rainfall sets the potential vegetation, relief refines it and human use decides what actually survives. Restoration must therefore match species to local climate and terrain, as the habitat choice for Project Cheetah illustrates.
Quick Revision
| Point | One-liner |
|---|---|
| Classification | Champion and Seth (1968): 16 type groups |
| Evergreen | More than 200 cm; rosewood, mahogany, ebony |
| Moist deciduous | 100–200 cm; teak, sal, sandalwood |
| Dry deciduous | 70–100 cm; teak, peepal, neem |
| Thorn | Less than 50 cm; babool, khejri, ber |
| Shola | Nilgiri, Anaimalai, Palani hills |
| Mangroves | Sundarbans, Bhitarkanika, Pichavaram |
| Policy target | One-third forest/tree cover (NFP 1988) |
| ISFR 2023 | 25.17% forest + tree cover |
Key Takeaways
- Rainfall sets the broad pattern: evergreen → moist deciduous → dry deciduous → thorn as rain falls below 200, 100, 70 and 50 cm.
- Altitude and coastal salinity create montane zones and mangroves independent of the rainfall ladder.
- For Mains, link vegetation to water, carbon, livelihoods and disasters — not just to area statistics.
Related Topics
- Natural Vegetation and Wildlife — quick revision
- Natural Vegetation and Wildlife — practice questions
- Biogeography and Soils
- Protected Areas and Wildlife
- Biodiversity and Conservation