The keys all take me to Lepidozia but then I'm stuck. This is just too big to be Lepidozia reptans. It is also brown yellow, nothing like the bright green of reptans.
It is up to 2.5mm wide, leaves are 1mm long, stems are 5-8cm long with uneven bipinnate branches.
There are 3-4 lobes on the leaves. If there are underleaves I can't see them.
Spores 25-30um round with what would be described as warts if they were mushroom spores. Elators about 125um long and 7.5um wide.
Leaf cells are round to egg shaped about 15um wide with what looks like many oil bodies. Specimen is two days old and got dried out in the sun.
This was found on the top of the bark of the base of a pistol butted hemlock tree at 3,800 feet in elevation. It had many sporophytes.