山苍树（学名：Litsea cubeba），又名豆豉姜、木姜子、山胡椒、山鸡椒、马告，是樟科木姜子属的一种植物。

落叶乔木，一般高约5至10米。在二至三月开淡黄色小花，具香气。在七到八月结果。主要分布在**、四川、云南、贵州经华南至华东、华中、**各地，还有东南亚各国。

May Chang (Litsea cubeba; Aromatic litsea) is an evergreen tree or shrub 5–12 meters high in the Lauraceae family. It is native to China, Indonesia, ****** and other parts of Southeast Asia. It is called "mountain pepper" (山胡椒) in Mandarin and maqaw (馬告) by the Atayal aborigines in ******. As a famous spice among ******ese aborigines, a proposed National Park at Yilan County is named "Magao" after the spice. It produces a fruit which is processed for its lemony essential oil. The oil can also be extracted from the leaf, but this is considered to be lower in quality. The timber is sometimes used for making furniture and crafts. Plant parts are also used in medicine.