柳叶藓（学名：Amblystegium serpens）为柳叶藓科柳叶藓属下的一个种。

Amblystegium serpens, the creeping feathermoss, is a species of moss. Its range includes Britain, where it is a common species.

Creeping feather-moss is pleurocarpous in form, with ovate to lanceolate leaves which end in a fine acute point. It forms creeping mats on decaying tree stumps, hedgebanks and other shaded sites.