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Phylum: Charophyta   Family: Desmidiaceae

Staurastrum polymorphum  Br√©bisson

As the name suggests, a decidedly variable species. Found in peaty pools and bogs but less often in the plankton

Koos Meesters

Ralfs (1848) The British Desmidieae
West & West (1904-23) A Monograph of the British Desmidiaceae
Coesel & Meesters (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus