Phylum: Charophyta   Family: Closteriaceae

Closterium dianae Ehrenberg ex Ralfs 1848

A common species of acidic pools and bogs, also from disused peat-cuttings. It has spawned a number of varieties which are not always easy to separate.

References: 
Brook, A.J. & Williamson, D.B. (2010) A Monograph on some British Desmids.
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands.
West, W. & West, G.S. (1904) A Monograph of the British Desmidiaceae, Volume 1.