 The site is one of the best examples of ramparted ground-ice depression features in Wales.The depressions, in turn, provide a mire habitat for a variety of plants such as red bog moss ("Sphagnum capillifolium"), hare's-tail cotton-grass ("Eriophorum vaginatum"), cross-leaved heath ("Erica tetralix") and heather ("Calluna vulgaris").The mix of plants in any depression varies according to conditions in and water supply for the depression, and the site hosts a wide and diverse set of species including the only known colony of the liverwort ("Pallavicinia lyellii) in Carmarthenshire.