Yesterday afternoon we explored a nice stretch of the River Tawe between Pontardawe and Ystalyfera, all of which is in Neath Port Talbot. We've recorded Mnium marginatum there before, but it was nice to find some significant clusters in the vicinity of SN74350568. Nearby river banks had small amounts of Mnium stellare, Trichostomum tenuirostre and some Homalia trichomanoides which is not common on the Tawe in our experience. Large riverside boulders had Cinclidotus fontinaloides, Schistidium apocarpum, S. platyphyllum and S. rivulare and on some there were photogenic cushions of Orthotrichum cupulatum. It's a good time to look out for this smart 'rocky' Orthotrichum, which is often conspicuously dressed in abundant capsules.
Orthotrichum cupulatum on a riverside boulder near Ynysmeudwy