Didymodon fallax?

I have moved on to this moss.  I have no idea what it is.. All the leaf tips are shed.  the leaves are 2mm X .5mm the cells are linear at the base to quadrate at the apex.  the stems are about a centimeter tall and packed together.  It has rotten wood attached to it.  Notes on the packet say  12-26-80 WS Rice hummus N84 3100 Skamania co T7n rwe sw14 s 7.  So I guess it was collected in Skamania county at 3,100 feet on hummus.  But it clearly is attached to rotten wood.

Leaf panorama at 100X magnification