小狮子草（学名：Hygrophila polysperma）是爵床科水蓑衣属的植物。分布在马来西亚、印度以及中国大陆的云南、广西、广东等地，目前尚未由人工引种栽培。

Hygrophila polysperma, commonly known as dwarf hygrophila, dwarf hygro, Miramar weed, Indian swampweed or Indian waterweed, is an aquatic plant in the acanthus family. It is native to Bangladesh, India, China and Malaysia, and has also been introduced to the US states of Florida, Texas and possibly Virginia. It is listed on the Federal Noxious Weed List in the US and is illegal to import and sell in a number of states including Kansas and South Carolina.