|Left vc42, right vc41|
As I was in Merthyr on Friday and I had a spare hour, I made a quick sojourn into SO01K, which was on a paltry 10 species. Even within my limited time slot I was able to quickly add an additional 64 species to the list for what is undoubtedly a much richer partial tetrad. There was also interest before reaching my target the square, when crossing Pontsarn viaduct I noticed a nice colony of Grimmia orbicularis on the Brecon side, new for vc42 according to the blog county lists.
Once in the square a large decorticated log was found to hold a good colony of Riccardia palmata (below; photo 1) and the limestone outcrops & boulders supported abundant drapes of Neckera crispa on dry cliffs with sheets of Conocephalum salebrosum in damper sections. The most interesting species of the drier sections were Loeskeobryum brevirostre (photo 2), Scapania aspera (photo 3) and Platydictya jungermannioides (photos 4-7), the latter new for Glamorgan with 3 small colonies noted in crevices, but with plenty of the same habitat, it seems likely there will be a strong population at this site.