Shorea obtusa, the Siamese sal,[3] is a species of hardwood tree in the family Dipterocarpaceae, native to Southeast Asia.
| Siamese sal | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Rosids |
| Order: | Malvales |
| Family: | Dipterocarpaceae |
| Genus: | Shorea |
| Species: | S. obtusa
|
| Binomial name | |
| Shorea obtusa | |
| Synonyms[2] | |
| |
Distribution and habitat
editShorea obtusa is native to Myanmar, Thailand, Cambodia, Laos, and Vietnam. It grows in relatively dry areas, often sharing the same habitat with Dipterocarpus obtusifolius, as well as oaks Quercus kerrii, Quercus kingiana, and pines, up to 1,300 metres (4,300 ft) altitude in Thailand. Another description of the habitat is that it grows in the clear forests at 150–1,300 m (500–4,300 ft).[4]
Description
editShorea obtusa is a deciduous tropical tree, growing 10–30 m (30–100 ft) tall. It flowers from January to July; the distinctive yellow flowers droop in clusters, with long narrow petals.[5] It grows stunted in savannas.[6]
Uses
editAs well as an export timber source, the wood is graded as first (highest) category in Cambodia. It is a very hard timber and is used to make columns, bridges, sleepers, and for other various construction purposes.[4] Exposed in the open, it may last 10–15 years, though if indoors it may last 50–60 years. The resin, from the trunk, is used to make torches, while the bark is part of a malaria remedy. The tree is the most preferred source of firewood in some areas of Kompong Chhnang Province, Cambodia.[7]
Conservation
editShorea obtusa has been assessed as Near Threatened on the IUCN Red List. The species is threatened by logging for timber and land conversion for agriculture. The prior assessment in 1998 had assessed the species as Least concern.[1]
References
edit- ^ a b Ly, V.; Nanthavong, K.; Pooma, R.; Luu, H.T.; Nguyen, H.N.; Barstow, M.; Vu, V.D.; Hoang, V.S.; Khou, E.; Newman, M.F. (2017). "Shorea obtusa". IUCN Red List of Threatened Species. 2017: e.T33027A2831618. doi:10.2305/IUCN.UK.2017-3.RLTS.T33027A2831618.en. Retrieved 17 November 2021.
- ^ a b "Shorea obtusa". Plants of the World Online. Royal Botanic Gardens, Kew. Retrieved 3 January 2021.
- ^ Graham, Mark (1994). Thailand's Vanishing Flora and Fauna. Finance One Publishing Company. p. 37.
- ^ a b DY PHON Pauline, 2000, Plants Used In Cambodia, self-published, printed by Imprimerie Olympic, Phnom Penh
- ^ Gardner, Simon, Pindar Sidisunthorn, and Vilaiwan Anusarnsunthorn. A Field Guide to Forest Trees of Northern Thailand. Bangkok: Kobfai Publishing Project, 2000.
- ^ "Northern Thailand Forest in the decade of 1960". Archived from the original on 2010-07-01. Retrieved 2009-03-31.
- ^ San, Vibol; et al. (2012). "Fuelwood consumption patterns in Chumriey Mountain, Kampong Chhnang Province, Cambodia". Energy. 44 (1): 335–46. Bibcode:2012Ene....44..335S. doi:10.1016/j.energy.2012.06.025.