红胶木属（学名：Tristania）是桃金娘科下的一个属，为乔木或灌木植物。该属共有约20余种，分布于马来西亚及大洋洲各地。

Tristania is a monotypic genus of flowering plants native to New South Wales, Australia, closely related to Callistemon. The genus had a number of species, but some have been reclassified as Lophostemon and Tristaniopsis. The sole species currently in the genus is Tristania neriifolia. It is known commonly as the water gum.