银合欢属（学名：Leucaena）是含羞草科下的一个属，为灌木或小乔木植物。该属共有40种，分布于美洲和大洋洲。

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Caudoleucaena Britton & Rose
Ryncholeucaena Britton & Rose

Leucaena is a genus of flowering plants in the subfamily Mimosoideae of the legume family Fabaceae. It contains about 24 species of trees and shrubs, which are commonly known as leadtrees. They are native to the Americas, ranging from Texas in the United States south to Peru. The generic name is derived from the Greek word λευκός (leukos), meaning "white," referring to the flowers.