白桐树（学名：Claoxylon indicum，又称「丢了棒」）为大戟科白桐树属下的一个种。生于海拔20-400米平原、山谷或河谷疏林中。分布于亚洲东南部各国和印度。

根为药用，味甘、淡，性平，能袪风除湿、散瘀止痛。

Claoxylon indicum is a dioecious flowering plant in the spurge family, Euphorbiaceae. The specific epithet comes from the Latin Indicus (Indian), referring to the locality of collection of the type specimen, which was probably Java, part of the Dutch East Indies at that time.