ໄມ້ເພົາ / Siamese sal

Use
Income
Oil Extract
Scientific Name / Family
Shorea siamensis Miq. / Dipterocarpaceae
Synonyms
Other Names
Thai: san, san taeng, san rang, bau, ko cheua, ngae, chik, chant ok, teng, teng
khao, nao nai, prachat, prachoek, pha chek, la nai, lae noei, ong liang yong
Vietnamese: sen ca chac, sen do
Cambodian: dom cheroy phechek
English: dark red meranti, light red meranti, or red lauan
Conservation Status
Least Concern
Botanical Description

Most dry Dipterocarp trees are deciduous, of medium height, with stunted crowns, thick rough bark, and winged seed. Evergreen species such as Vatica can reach  up to 35 m. Mai chik khok is 10-25 m tall, and 30 cm in DBH with dark-brown  and rough furrowed outer bark, and red-brown inner bark with yellow-white sap. The leaves are red when young, 7-12 cm long and 4-6 cm wide, with a hairy lower surface and a leafstalk of 3-4 cm. The inflorescence is a cluster of yellow, scented flowers. The fruit has three long and two short wings, about 3-4 cm long. Villagers believe that only trees attacked by boring insects produce resin.

Description of Use

Locally dammar is mixed with Nyang oil, another Dipterocarp oleo resin, to make boats and baskets watertight. The same mixture is also used in lighting torches and sold to Thailand, China and India. Much is exported to Vietnam, where it is used in the production of varnish or lacquer and incense sticks. It is also used in  the production of paint and ink. The hard wood can be used in construction and to make railway sleepers.

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