异萼木属（学名：Dimorphocalyx）是大戟科下的一个属，为灌木或乔木植物。该属共有12种，分布于印度、马来西亚和澳大利亚。

Dimorphocalyx is a genus of plants under the family Euphorbiaceae first described as a genus in 1861. It is native to Southeast Asia, Hainan, India, Sri Lanka, New Guinea, and Queensland.

moved to Actephila Blachia Trigonostemon