There's an imposing north-facing outcrop that hangs high above the A4107 just west of Cymmer and opposite the small village of Abercregan (SS852962). Surprisingly, we've never looked at these acidic, sandstone blocks before, but late yesterday afternoon in fading light we gave them a cursory inspection. In association with an abundance of fairly common liverworts such as Diplophyllum albicans, Gymnocolea inflata and Lophozia ventricosa we noted some nice patches of Ptilidium ciliare, which is not common in NPT.
Ptilidium ciliare, Cymmer
More pleasing was the local abundance of Barbilophozia floerkei and B. attenuata, both of which are fairly scarce in VC41.
Barbilophozia floerkei, Cymmer
Barbilophozia attenuata (and Oreoweisia bruntonii), Cymmer
Other notables were Oreoweisia bruntonii and some fabulous clumps of Scapania gracilis.
Oreoweisia bruntonii, Cymmer
Scapania gracilis, Cymmer
I think a systematic search in better light could be rewarding. Also worthy of note was the abundance of Dryopteris cambrensis in the vicinity, although this is a relatively common species in the uplands of NPT.