(Dipterocarpus retusus)
Dipterocarpus retusus is a large tree and perhaps the best known species in the genus Dipterocarpus. It is known as chhë tiël pré:ng in Khmer, as 东京龙脑香 dong jing long nao xiang in Chinese. It is native to China, Vietnam, Philippines, Laos, Cambodia, Malaysia, Indonesia, Myanmar, and India. The tree, some 20-30m tall, is found in Cambodia in dense forests of the plains, common on hillsides and along rivers and in forests between 800m and 1500m altitude.