鼠曲草（学名：Gnaphalium affine）是菊科鼠曲草属的一种植物，又名清明草、佛耳草、母子草等。

二年生草本，高10～15公分。茎直立，密生白色绵毛。叶互生，倒披针形或匙形，长2～7公分，基部下延，两面有灰白色绵毛。头状花序密集生于枝端，总苞片三层，金黄色，小花黄，外围雌花。中央两性花，瘦果冠毛，黄白色。

Gnaphalium affine, also known as Jersey cudweed, is a species of plants belonging to the genus Gnaphalium. The species grows extensively in East Asia including temperate regions of China, Korea, Japan, and ****** as well as some high altitude tropical regions of India, Nepal, and Thailand.