Identify this moss

It's been hot and dry for so long; even in the shady woods, the mosses are crispy and dark. This one was struggling along on a rock beside Woodhus Creek.

Unidentified moss. The leaves are still trying to stay green, and it's making spores.

The sporangium (spore case) is barrel-like, with teeth at the mouth (the peristome), standing upright on a tall stem (the seta). And this stem is twisted into a spiral.

Zooming in.

I don't know what species of moss this is. I remember once seeing something about a moss stem twisted this way, but I don't remember where. And I haven't found it in several hundred photos on Google.

Help!