Phylum: Charophyta   Family: Closteriaceae

Closterium baillyanum (Brébisson ex Ralfs) Brébisson 1856

Widespread and common where acidic conditions exit, such as peaty pools, disused peat-cuttings and especially with Sphagnum.

References: 
Brébisson, L. A. de (1856) Liste des Desmidiées, observées en Basse-Normandie.
Brook, A.J. & Williamson, D.B. (2010) A Monograph on some British Desmids.
John, D.M. & Williamson, D.B. (2009) A Practical Guide to the Desmids of the West of Ireland.
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands.