See text Pterocymbium[1] is a genus in the family Malvaceae: in the subfamily Sterculioideae and previously placed in the Sterculiaceae.

[2] In Indonesia, P. tinctorium (Kelumbuk) is a significant timber tree.

Plants of the World Online[3] currently (2019) lists the following accepted species: § In Viet Nam the name for this genus is Dực nang with two species listed:[4] Both are deciduous trees, approximately 25 m high, found in tropical forests.