abstract:Dipterocarpus alatus (, Khmer chhë tiël ba:y, chhë tiël tük, chhë tiël thom DY PHON Pauline, 2000, Plants Used In Cambodia, self-published, printed by Imprimerie Olympic, Phnom Penh or chheuteal, Vietnamese Dau nuoc (Dau rai)) is a tropical forest tree, of dense evergreen or mixed dense forests, common in Thailand, Cambodia, Laos and Vietnam. 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.