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Phylum: Charophyta   Family: Desmidiaceaea

Cosmarium portianum var. nephroideum  Wittrock

Differs from the nominate variety by having reniform semicells. Of uncertain distribution in the Outer Hebrides

Determiner: 
Chris Johnson

References: 
Coesel, P.F.M. & Meesters, K.J. (2007) Mesotaeniaceae and Desmidiaceae of the European Lowlands
West, W. & West, G.S. (1908) A Monograph of the British Desmidiaceae, Volume 3

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