Mesoptychia collaris Mountain Notchwort

Somewhat like a small form of Mesoptychia bantriensis and with a similar distribution in Britain, this dioicous, Arctic-montane leafy liverwort is very much an upland or mountain species. It is very rare in West Glamorgan where the the only record is from the Nedd Fecahn valley near Pont Nedd Fechan. Sporophytes are occasional.