Alstonia angustiloba is a tree in the dogbane family Apocynaceae.

Alstonia angustiloba grows as a large tree up to 40 metres (130 ft) tall, with a trunk diameter of up to 60 centimetres (24 in).

Its fragrant flowers feature a white, yellow or cream corolla.

[2] Alstonia angustiloba is native to Thailand, Peninsular Malaysia, Singapore, Sumatra and Java.

[1] It is found in a variety of habitats from sea level to 200 metres (700 ft) altitude.