Dipterocarpaceae are a family of 16 genera and approximately 695 known species of mainly tropical lowland rainforest trees. The family name, from the type genus Dipterocarpus, is derived from Greek and refers to the two-winged fruit. The largest genera are Shorea, Hopea, Dipterocarpus, and Vatica. Many are large forest emergent species, typically reaching heights of 40–70 m, some even over 80 m, with the tallest known living specimen 93.0 m tall. The species of this family are of major importance in the timber trade. Their distribution is pantropical, from northern South America to Africa, the Seychelles, India, Indochina, Indonesia and Malaysia. The greatest diversity of Dipterocarpaceae occurs in Borneo. Some species are now endangered as a result of overcutting, extensive illegal logging and habitat conversion. They provide valuable woods, aromatic essential oils, balsam, resins and are a source for plywood.
Dipterocarpus retusus is a large tree and perhaps the best known species in the genus Dipterocarpus. It is known as chhë tiël pré:ng in Khmer, as 东京龙脑香 dong jing long nao xiang in Chinese. It is native to China, Vietnam, Philippines, Laos, Cambodia, Malaysia, Indonesia, Myanmar, and India. The tree, some 20-30m tall, is found in Cambodia in dense forests of the plains, common on hillsides and along rivers and in forests between 800m and 1500m altitude.
Dipterocarpus is a genus of flowering plants and the type genus of family Dipterocarpaceae.
Dipterocarpus gracilis is a critically endangered species of tree in the family Dipterocarpaceae, native to South Asia and Southeast Asia.
Dipterocarpus kerrii is a critically endangered species of tree in the family Dipterocarpaceae, native to India, Indonesia, peninsular Malaysia, Myanmar, the Philippines, Thailand and Vietnam.
Pterocarpus macrocarpus, or the Burma padauk, is a tree native to the seasonal tropical forests of southeastern Asia: in Myanmar, Laos, Cambodia, Thailand, and Vietnam. It has been naturalized in India and the Caribbean. In Vietnamese, this species is called giáng- or dáng-hương.
Dipterocarpus grandiflorus is a critically endangered common medium hardwood tree in South-East Asia and India. Its wood is used to produce good quality charcoal, paper pulp, and timber sold under the Keruing designation. Its gum is used locally as a waterproofing varnish. The tree itself is very useful for nitrogen fixing, erosion control, soil improvement, and watershed regulation.
The Hoollongapar Gibbon Sanctuary, formerly known as the Gibbon Wildlife Sanctuary or Hollongapar Reserve Forest, is an isolated protected area of evergreen forest located in Assam, India. The sanctuary was officially constituted and renamed in 1997. Set aside initially in 1881, its forests used to extend to the foothills of the Patkai mountain range.
Tropical Evergreen forests of India are found in the Andaman and Nicobar Islands, the Western Ghats, which fringe the Arabian Sea, the coastline of peninsular India, and the greater Assam region in the north-east. Small remnants of evergreen forest are found in Odisha state. Semi-evergreen forest is more extensive than the evergreen formation partly because evergreen forests tend to degrade to semi-evergreen with human interference. There are substantial differences between the three major evergreen forest regions.
Dehing Patkai Wildlife Sanctuary is located in the Dibrugarh and Tinsukia Districts of Assam and covers an area of 111.19 km2 (42.93 sq mi) rainforest. It is part of the Assam valley tropical wet evergreen forest and consists of three parts: Jeypore, upper Dihing River and Dirok rainforest. It was declared a sanctuary on 13 June 2004. This sanctuary is also a part of Dehing-Patkai Elephant Reserve. The rainforest stretches for more than 575 km2 (222 sq mi) in the districts of Dibrugarh, Tinsukia and Sivasagar. A part of the forest was declared as a wildlife sanctuary by the Government of Assam, while another part falls under the Dibru-Deomali Elephant Reserve. The forest further spreads over in the Tirap and Changlang districts of Arunachal Pradesh. The Dehing Patkai forms the largest stretch of tropical lowland rainforests in India. The forest is often referred to as "The Amazon of the east" owing to its large area and thick forests.
Lactarius distantifolius is a member of the large milk-cap genus Lactarius in the order Russulales. Found in Chiang Mai Province, it was described as new to science in 2010. The fruit bodies of the fungus were found growing in a teak plantation with Dipterocarpus obtusifolius and other Dipterocarpus species, Pterocarpus macrocarpus, and Shorea species.
Phu Sang National Park is a national park in Northern Thailand.
Dipterocarpus turbinatus is a species of tree in the family Dipterocarpaceae native to north-eastern India and mainland Southeast Asia, and cultivated in surrounding areas. It is an important source of the wood known as keruing, and is often used in the plywood industry.
Tat Ton National Park is a national park in Chaiyaphum Province, Thailand. The park, located in the Laen Kha mountain range, features waterfalls and mountain highland scenery.
Chae Son National Park is a national park in Lampang Province, Thailand. Home to the namesake Chae Son waterfall, the park is also host to caves and hot springs.
Tat Mok National Park is a national park in Phetchabun Province, Thailand. Established on 30 October 1998, it is the 87th national park in Thailand.
Op Luang National Park is a national park in Chiang Mai Province, Thailand. It is home to a scenic river canyon, waterfalls, and caves.
Huai Nam Dang National Park is a national park in Thailand's Chiang Mai and Mae Hong Son Provinces. This mountainous park features scenic mountain viewpoints, waterfalls, and hot springs.
Dipterocarpus bourdilloni is a species of large tree in the family Dipterocarpaceae endemic to the Western Ghats principally in the state of Kerala in India.
Assam – 16th largest, 15th most populous and 26th most literate state of the 29 states of the democratic Republic of India. Assam is at 14th position in life expectancy and 8th in female-to-male sex ratio. Assam is the 21st most media exposed states in India. The Economy of Assam is largely agriculture based with 69% of the population engaged in it. Growth rate of Assam's income has not kept pace with that of India's during the Post-British Era; differences increased rapidly since the 1970s. While the Indian economy grew at 6 percent per annum over the period of 1981 to 2000, the same of Assam's grew only by 3.3 percent.
