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Phylum: Charophyta   Family: Desmidiaceae

Xanthidium fasciculatum var. oronense  West & G.S. West

West & West descibe this as 'An American variety', and note that the nominate is rare in Britain. There is little data available to enlarge on this. Found in moorland pools

Chris Johnson

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