地肤（学名：Kochia scoparia）是藜科地肤属的植物。

一年生草本，被具节长柔毛，分枝甚多；线状披针形叶片，无毛或稍有毛，通常有3条明显的主脉，边缘有疏生的锈色绢状缘毛；夏秋季开小花，簇生叶腋；花被包裹果实，各片背上有一水平拓展的翅。

Bassia scoparia (syn. Kochia scoparia) is a large annual herb in the family Amaranthaceae native to Eurasia. It has been introduced to many parts of North America, where it is found in grassland, prairie, and desert shrub ecosystems. Its common names include burningbush, ragweed, summer cypress, mock-cypress, kochia, belvedere, Mexican firebrush, and Mexican fireweed.