Mniums, Bryums & other wide-leaved ground mosses

There are a group of mosses that grow on the ground in especially shady places...they have wide leaves which have short to long teeth.
below is a field key to some of our common wide-leaved mosses:

and if you have a dissecting and/or compound microscope, here are some of the microscopic features:

over the next few posts, i'll go into a little more detail some of the species...such as the differences between Mniums & Bryums..and how the Mnium family is split into three distinct groups: Rhizomnium, Plagiomnium and Mnium.