Dipterocarpus alatus

Dipterocarpus alatus (Thai: ยางนา, RTGS: yang na, pronounced [jāːŋ nāː]; Khmer: chhë tiël ba:y, chhë tiël tük, chhë tiël thom[3] or ឈើទាល (chheutéal); Vietnamese: dầu nước, dầu rái), also known colloquially as the resin tree, is a tropical forest tree, of dense evergreen or mixed dense forests, in tropical Asia. It is considered vulnerable.[1]

Dipterocarpus alatus
Dipterocarpus alatus in Chiang Mai City Pillar Shrine
Seed - MHNT
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Malvales
Family: Dipterocarpaceae
Genus: Dipterocarpus
Species:
D. alatus
Binomial name
Dipterocarpus alatus
Synonyms[2]
  • Dipterocarpus gonopterus Turcz.
  • Dipterocarpus incanus Roxb.
  • Dipterocarpus philippinensis Foxw.
  • Hopea conduplicata Buch.-Ham.
  • Oleoxylon balsamifera Roxb.
  • Pterigium costatum Corrêa
In Kengtung, Burma

Description

Dipterocarpus alatus is a large tree, growing to between 30 and 60 m tall. It is insect pollinated, and sets fruit between March and April. Its seeds are wind dispersed.[1]

Range and habitat

Dipterocarpus alatus ranges from West Bengal and Bangladesh through Myanmar, Thailand, Laos, Cambodia, and Vietnam,[1] along with Peninsular Malaysia and the Philippines.[2] It is also native to Sri Lanka and the Andaman Islands.[1][2]

It grows in evergreen and semi-evergreen lowland dipterocarp forests in valleys and foothills. It is often found on ancient alluvial, granite, and basalt rock substrates. It requires humid and well-drained soil. It tolerates flooding but not fire or wind.[1]

It often occurs gregariously along river banks and is a key planting species for regenerating deforested land around the Dong Nai river and Cat Tien National Park.

Uses

In Cambodia, the wood is much valued in construction and cabinetwork, when not exploited for its oily resin. Generally, resin is collected for the following uses: wood lacquering, draught-proofing of boats and traditional medicine. When mixed with beeswax, it is used in bandages for ulcerated wounds. The bark of young trees is also used in traditional medicine, taken against rheumatism and diseases of the liver, and to stimulate appetite in cattle.[3]

In Myanmar, one of the largest of the species is in Kengtung, see photos.

Descriptive sign for tree, Kengtung, Burma

References
  1. Ly, V.; Nanthavong, K.; Pooma, R.; Barstow, M.; Luu, H.T.; Khou, E.; Newman, M.F. (2017). "Dipterocarpus alatus". IUCN Red List of Threatened Species. 2017: e.T33007A2829912. doi:10.2305/IUCN.UK.2017-3.RLTS.T33007A2829912.en. Retrieved 19 November 2021.
  2. "Dipterocarpus alatus". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 21 July 2020.
  3. DY PHON Pauline, 2000, Plants Used In Cambodia, self-published, printed by Imprimerie Olympic, Phnom Penh
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