Llantrisant Common and Pastures is a Site of Special Scientific Interest

Site of Special Scientific Interest

A Site of Special Scientific Interest is a conservation designation denoting a protected area in the United Kingdom. SSSIs are the basic building block of site-based nature conservation legislation and most other legal nature/geological conservation designations in Great Britain are based upon...

 in Llantrisant

Llantrisant

Llantrisant is a town in the county borough of Rhondda Cynon Taf in Wales, within the historic county boundaries of Glamorgan, Wales, lying on the River Ely and the Afon Clun. The town's name translates as The Parish of the Three Saints. The three saints in question are St Illtyd, St Gwynno and St...

, south Wales

Wales

Wales is a country that is part of the United Kingdom and the island of Great Britain, bordered by England to its east and the Atlantic Ocean and Irish Sea to its west. It has a population of three million, and a total area of 20,779 km²...

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The Countryside Council for Wales

Countryside Council for Wales

The Countryside Council for Wales is an Assembly Government Sponsored Body. It is the Welsh Assembly Government's wildlife conservation authority for Wales...

 states that the site has been categorisied as a Site of Special Interest for "...its extensive area of acidic marshy grassland in a lowland setting, as well as for smaller areas of species-rich neutral grassland, dry acidic grassland and flush. It is also of special interest for populations of two rare plants: Cornish moneywort and a liverwort known as bog earwort."