栗蕨（学名：Histiopteris incisa）为凤尾蕨科栗蕨属下的一个种。

Histiopteris incisa known as the bat's wing fern or water fern is a common plant found in Australia, New Zealand and other islands in the south Pacific region. Usually found in moist areas, where it may form large colonies. Fronds are soft and green. Up to two metres long, opposite on the stem, with deeply lobed segments. The rhizome is 2 to 7 mm wide, with brown or reddish scales, around 5 mm long.