Mixed in with mats of Andreaea rothii (and a few other spp) on the edges of seepy conglomerate bedrock on a mountaintop.
Observation for the Andreaea: https://www.inaturalist.org/observations/173998287
Known from this spot, but not sure if it was concurring with another bryo. Specimen collected!
Very large population. Some plants at risk of being trampled
Growing in Calcareous Montane Cliff Community, Bucks Co.