马桑（学名：Coriaria nepalensis）为马桑科马桑属的植物。

落叶灌木；幼枝有棱；椭圆形或卵状椭圆形全缘叶子对生，顶端尖，基出三大脉，紫色叶柄；春季开花，杂性，总状花序，雄花序先叶开放；浆果状瘦果，熟时为紫黑色，外包肉质花瓣。

Coriaria nepalensis is a shrub of the genus Coriaria. It grows in the foot hills of Himalayas. It blooms in spring and has bright yellow flowers and red fruits in summer.

The plant is also known in English as masuri berry, tanner's tree, or mansur shrub. In Hindi it is known as masuri (मसूरी), makola, or masurya (मसूरिया); and in Nepali as macchaino (मछाईनो).