Thursday, 23 March 2017
The easternmost of the west
Work took me to the valley of the Afon Diliw, which forms the border between Ceredigion and Montgomeryshire. A couple of hours looking for bryophytes (and lichens) produced about 80 species in the main tetrad (SN87I) and 50 in the fragment of SN87J that falls within VC46. Getting here involves driving in from the east (so it's a major trek from Aberystwyth) because the road in from Cwmystwyth is only suitable for 4x4, so as far as I know it was completely unknown bryologically.
There weren't any major surprises, and my hoped for oceanic liverworts were absent (except for copious Colura). The most interesting species were Pohlia elongata (photo) on a rock outcrop, Jungermannia obovata by the river, Sphagnum girgensohnii (photo) and S. russowii (photo) on steep banks, and a patch of Lophozia incisa. Lichens need a bit more checking, but Usnea filipendula and potential Hypotrachyna sinuosa were highlights.