Though much taken for granted and very common in many areas, Tetraphis is a very unusual moss. It is one of very few species that have only four peristome teeth; Tetrodontium brownianum and T. repandum do too and are also in the Tetraphidaceae. Tetraphis is also noteworthy for its ability to reproduce sexually and asexually at the same time and populations can often be found with both capsules and gemma-cups.
Read the Field Guide account
When capsules are present, this species is unlikely to be mistaken for anything else, but in the absence of both capsules and gemmae, it is most likely to be confused with Bryum or Pohlia species.
