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Phylum: Charophyta   Family: Desmidiaceae

Staurastrum ralfsii  (West & G.S. West) Coesel & Meesters

This was, until recently, Staurastrum orbiculare var. ralfsii West & G.S. West which they describe as 'abundant and widely distributed'. An acidophile of loch-margins and boggy pools

Chris Johnson

Coesel & Meesters (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
West & West (1904-23) A Monograph of the British Desmidiaceae