柞木属（学名：Xylosma）是大风子科下的一个属，为常绿乔木或灌木植物。该属共有约100种，分布于热带和亚热带地区。

Xylosma /zaɪˈlɒzmə/ is a genus of flowering plants in the willow family, Salicaceae. It contains around 100 species of spiny evergreen shrubs and trees commonly known as brushhollies, xylosmas, or, more ambiguously, "logwoods". The generic name is derived from the Greek words ξύλον (xylon), meaning "wood," and ὀσμή (osmé), meaning "smell," referring to the fragrant wood of some of the species. The Takhtajan system places it in the family Flacourtiaceae, which is considered defunct by the Angiosperm Phylogeny Group.