Hygrobiella laxifolia Lax Notchwort

A very slender, rather inconspicuous, dioicous leafy liverwort that forms colonies over rocks in permanently wet places, such as in the vicinity of waterfalls. The shiny green leaves are widely spaced on the stem and no more than 0.4mm long with two pointed lobes that are about half their length. It is a Suboceanic Boreal-montane species which in Britain is most common in Scotland and very scarce in the south. However it is locally frequent in Wales and should always be searched for in upland river sytems where there are waterfalls. It was found by Sharon Pilkington on wet rocks in the vicinity of a small waterfall near Gyncorrwg, in the Afan Valley, in 2013. This is its only known site in West Glamorgan, but it may be under recorded. Male plants are rare but female plants with sterile perianths may be abundant.