Neobalanocarpus heimii, commonly known as the red balau, red meranti or chengal, is a species of hardwood tree in the Dipterocarpaceae family (Chudnoff, 1984). It is native to Southeast Asia, where it grows in lowland and hill dipterocarp forests of Thailand and Peninsular Malaysia (Whitmore, 1998). The tree can reach heights of up to 50 meters (Chudnoff, 1984) and has a straight, cylindrical trunk with rough, dark brown bark (Whitmore, 1998).

The leaves of Neobalanocarpus heimii are alternate and oblong in shape, with a glossy green color and a smooth, leathery texture (Chudnoff, 1984). They are typically about 10-15 cm long and have a pointed tip (Whitmore, 1998). The flowers of the tree are small and yellow, and are followed by small, round fruit containing seeds or a wingless fruit (Chudnoff, 1984).

In addition to its ecological and economic importance, Neobalanocarpus heimii also has cultural significance in many parts of Southeast Asia. The tree is often planted around temples and other sacred sites and is considered to be a symbol of good fortune and prosperity (Whitmore, 1998). Despite its many uses and cultural significance, Neobalanocarpus heimii is threatened by habitat loss and degradation due to logging, agriculture, and other human activities (Chudnoff, 1984). Conservation efforts, such as the protection of natural habitats and the promotion of sustainable land use practices, are necessary to ensure the long-term survival of this species.