曲尾藓（学名：Dicranum scoparium）为曲尾藓科曲尾藓属下的一个种。

Dicranum scoparium, the broom forkmoss, is a species of dicranid moss, native to North America, including the Great Lakes region. It usually forms tufts or mats on soil in dry to moist forested areas. Broom moss can be distinguished by its leaves, which strongly curve to one side.