Tetraphis pellucida is one of two species ofmoss in the acrocarpous genusTetraphis. Its name refers to its four large peristome teeth found on the sporophyte capsule.
Tetraphis pellucida occurs almost exclusively on rotten stumps and logs, and is native to the northern hemisphere. The leafy shoot is between eight and 15 mm tall. The lower leaves are one to two mm long, where as the upper and perichaetial leaves-leaves that surround the archegonia- are three mm long. Leaves plane and entire at the margins.
(From Wikipedia, February 2015)