Block scree habitat above Blaengwynfi
Other species on rocks here included R.aciculare and R. fasciculare, the former frequently encountered by us in habitats like this, away from any water course. The iron-rich sandstone rock typically supports crustose lichens like Porpidia macrocarpa and Lecidea lithophila but there was also a significant population of Stereocaulon dactylophyllum scattered over the scree.
Hilary was struck by the large amount of fruiting Polytrichum piliferum here with attractive red seta (completely lost on me, of course!!!).
Other interesting stuff included Tortella tortuosa, in the company of other calcicoles like Ctenidium molluscum and Campyliadelphus chrysophilus, mostly confined to the calcareous edges of the road. This is a rare species in NPT (there's no limestone in the county) but is also found on a coal tip in Afan Argoed and on an old wall near Cwnllynfell.
It's not always easy to get to these upland sites and, invariably,it requires quite a bit of hiking. But since that has probably put off others doing it before you, there's always a high probability that you'll be doing some trail-blazing surveys. RCT is full of places that fit into that category.