Tortula truncata

Description:

Tiny mosses are always a kind of hard for me to identify - many of them are pretty similar and I'm not really willing to spend hours examining cells structure to find out, which species I'm dealing with. But in this case, it was quite easy because of distinctive capsules.You can figure out how small is it keeping in mind that "boulders" in this photo are grains of sand on a surface of concrete block.