马齿苋(学名：Portulaca oleracea)，又名马生菜、马齿菜、五行草、酸苋、猪母菜、猪母乳、地马菜、马蛇子菜、长寿菜、老鼠耳、宝钏菜、蚂蚱菜，是马齿苋科马齿苋属植物。

一年生小型肉质草本植物，通常匍匐无毛，茎带有紫黄色；倒卵状楔形叶子对生；夏季开黄色小花；蒴果圆锥形，盖裂。

Portulaca oleracea (common purslane, also known as verdolaga, pigweed, little hogweed, red root, pursley, and moss rose) is an annual succulent in the family Portulacaceae, which may reach 40 centimetres (16 in) in height.

Approximately forty varieties are currently cultivated.