薤白（学名：Allium macrostemon，俗称“小根蒜”、“山蒜”、“苦蒜”、“小幺蒜”、“小根菜”、“野蒜”等）是葱科葱属的植物。

多年生草本；有葱蒜味，地下具有鳞茎；线形半圆柱状叶子基生数枚；春夏开粉红色小花，单一花茎，顶生伞状花序，内杂有肉质珠芽。

Allium macrostemon is a species of wild onion widespread across much of East Asia. It is known from many parts of China, as well as Japan (incl Ryukyu Islands), Korea, Mongolia, Tibet and Primorye. It has been collected from elevations ranging from sea level to 3000 m.