''Dipterocarpus retusus'', commonly known as hollong, is a large tree and perhaps the best known species in the genus ''

Dipterocarpus '' D. retusus'' in Köhler ''Dipterocarpus'' is a genus of flowering plants and the type genus of family Dipterocarpaceae. ''Dipterocarpus'' is the third-largest and most diverse genus among the Dipterocarpaceae. The species are well known for ...

''. It is native to China, Vietnam, Philippines, Laos, Cambodia, Malaysia, Indonesia, Myanmar, and India.DY PHON, Pauline, 2000, ''Plants Used In Cambodia'', printed by Imprimerie Olympic, Phnom Penh The tree, some tall, is found in Cambodia in dense forests of the plains, common on hillsides and along rivers and in forests between and altitude. Dipterocarpus tonkinensis Cho nau

Hollong is the state tree of

Assam Assam (; ) is a state in northeastern India, south of the eastern Himalayas along the Brahmaputra and Barak River valleys. Assam covers an area of . The state is bordered by Bhutan and Arunachal Pradesh to the north; Nagaland and Manipur ...

and

Arunachal Pradesh Arunachal Pradesh (, ) is a state in Northeastern India. It was formed from the erstwhile North-East Frontier Agency (NEFA) region, and became a state on 20 February 1987. It borders the states of Assam and Nagaland to the south. It shares ...

, India. In India, the timber is used for plywood and making various containers. In China, the timber is used in construction. Hollong is a sacred tree for Moran community of Assam.

Uses

It is farmed for its timber and resin. In

Cambodia Cambodia (; also Kampuchea ; km, កម្ពុជា, UNGEGN: ), officially the Kingdom of Cambodia, is a country located in the southern portion of the Indochinese Peninsula in Southeast Asia, spanning an area of , bordered by Thailan ...

, the resin is collected by people in the mountainous regions, in order to make torches and candles, while the wood is used in construction to make columns and boards.

References

retusus Trees of China Flora of tropical Asia Medicinal plants of Asia Symbols of Arunachal Pradesh Symbols of Assam {{medicinal-plant-stub