Tortula muralis, commonly known as wall screw-moss, is a species of moss in the family Pottiaceae. T. muralis is found throughout the world.
Due to the diversity of the genus Tortula, there are groups of taxa within the genus that are more closely related than others. The genus Tortula and the genus Barbula were previously used interchangeably, and some species have since been reclassified.The T. muralis complex consist of four taxa (T. lingulate, T. obtusifolia, T. muralis var. aestiva, T. muralis ...