Dipterocarpus retusus

Dipterocarpus retusus, commonly known as hollong,[3] is a large tree and perhaps the best known species in the genus Dipterocarpus. It is native to China, Vietnam, Philippines, Laos, Cambodia, Malaysia, Indonesia, Myanmar, and India.[1][4] The tree, some 20–30 metres (70–100 ft) tall, is found in Cambodia in dense forests of the plains, common on hillsides and along rivers and in forests between 800 m (2,600 ft) and 1,500 m (5,000 ft) altitude.[4]

In Vietnam

Dipterocarpus retusus
from Koehler's Medicinal-Plants (1887)
Scientific classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Dipterocarpaceae
Genus: Dipterocarpus
Species:
D. retusus
Binomial name
Dipterocarpus retusus
Synonyms[2]
  • Dipterocarpus macrocarpus Vesque
  • Dipterocarpus mannii King ex Kanjal, P.C.Kanjal & D.Das
  • Dipterocarpus pubescens Koord. & Valeton
  • Dipterocarpus spanoghei Blume
  • Dipterocarpus tonkinensis A.Chev.
  • Dipterocarpus trinervis Blume
Sapling at Hoollongapar Gibbon Sanctuary, Assam

Hollong is the state tree of Assam, India.[5] Hollong is a medium hardwood, timber tree. It grows naturally in forests of upper Assam and Arunachal Pradesh. Hollong is a sacred tree for Moran community of Assam. Today Hollong is used in plywood industries.

Uses

It is famed for its timber and resin. In Cambodia, 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.[4]

References
  1. Ly, V.; Nanthavong, K.; Pooma, R.; Luu, H.T.; Nguyen, H.N.; Vu, V.D.; Hoang, V.S.; Khou, E.; Newman, M.F. (2017). "Dipterocarpus retusus". IUCN Red List of Threatened Species. 2017: e.T32400A2817693. doi:10.2305/IUCN.UK.2017-3.RLTS.T32400A2817693.en. Retrieved 18 April 2019.
  2. "Dipterocarpus retusus". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 18 April 2019.
  3. "Dipterocarpus retusus". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved 18 April 2019.
  4. DY PHON, Pauline, 2000, Plants Used In Cambodia, printed by Imprimerie Olympic, Phnom Penh
  5. "State Trees and Flowers of India". flowersofindia.net. Retrieved 10 January 2021.
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