I never noticed that when magnified some of the Calyptra (oval ends of sporophytes) look a little bit like long sharp teeth!

A new-to-me moss, Plagiomnium cuspidatum. Very pretty with smooth, thin leaves.

A mound of various species of vibrant green mosses. Thirty to forty orange sporophytes grow from the center. These are thin tendrils with hollow, oval shaped ends that disperse seeds.
A mound of various species of vibrant green mosses. Orange sporophytes grow from the center. Close up these are thin tendrils with hollow, oval shaped ends that have a perforated end that has the appearance of sharp teeth..
A close-up photo of vibrant green moss with tiny, thin, semi-translucent leaves.