Pretty sure this is "Codriophorus acicularis" but it doesn't come up on here. :/ (Blunt Boulder Moss)
Grimmia growing on rock
dry plains savannah grassland; with needle grass (austrostipa) and danthonia
white tufts in Muehlenbeckia axillaris mat and Pilosella (mouse-ear hawkweed)
rock at shoreline
I think one of the Racomitrium (or former, depending on your taxonomist).
dry plains danthonia grassland; abundant characteristic species