I took Bea and Johnny to Beechenhurst in the Forest of Dean today for the 'Go Ape' and by good fortune found several of Bea's school friends there. This meant I was atypically stationary in one area, chatting, and my eyes subconsciously scanned the ground. They alighted on a dull-green patch of what looked like dense moss protonema, so I bent down and scraped up a bit of moss. I explained to Bea's friends parents "it looks like a new moss for Gloucestershire", and sure enough it was: Ephemerum rutheanum subsp. sessile. It was growing in gappy turf at SO61311232, just west of the Go Ape area, along with various other mosses that I didn't have time to check (a non-fertile Weissia looked interesting).