蕨麻（学名：Potentilla anserina）是蔷薇科委陵菜属的植物。

蕨麻是多年生草本。肉质根肥厚，呈纺锤状；葡萄茎细长，节上生根；基生叶为羽状复叶，小叶3-12对，椭圆形，背部密布白色棉毛；夏季开花，花单生较大，鲜黄色。

Argentina anserina, also known as common silverweed, silverweed cinquefoil or just "silverweed", is a flowering perennial plant in the rose family Rosaceae. It is native throughout the temperate Northern Hemisphere, often on river shores and in grassy habitats such as meadows and road-sides. The plant was formerly classified in the genus Potentilla but was reclassified into the resurrected genus Argentina by research in the 1990s. It is a species aggregate which has frequently been divided into multiple species.