泥炭藓（学名：Sphagnum palustre）为泥炭藓科泥炭藓属下的一个种。像这种类型的其他苔藓它可以吸收的水可达自身干重量的30倍，这归功于其弹性螺旋纤维。

Sphagnum palustre (Syn. Sphagnum cymbifolium), the prairie sphagnum or blunt-leaved bogmoss, is a species of peat moss from the genus Sphagnum, in the family Sphagnaceae. Like other mosses of this type it can soak up water up to the 30-fold amount of its own dry weight thanks to its elastic spiral fibers. S. palustre is rather frequent and is spread almost all over the world. It mainly grows in wet forests and—compared to other specimens of this genus—rarely grows in moors.