沼原草属（学名：Moliniopsis）是禾本科下的一个属。该属共有约2种，分布于东亚。

Molinia (moor grass) is a genus of two species of flowering plants in the grass family, native to damp moorland in Eurasia and northern Africa. They are both herbaceous perennial grasses.

The genus is named after Juan Ignacio Molina, a 19th-century Chilean naturalist.