Phylum: Charophyta   Family: Desmidiaceae

Staurastrum kouwetsii Coesel

An acidophile found in moorland pools and bogs. Distribution in the Outer Hebrides unclear

References: 
Coesel, P.F.M. & Meesters, K.J. (2013) European Flora of the Desmid Genera Staurastrum and Staurodesmus
Kouwets, F.A.C. (1999) A check-list of desmids (Chlorophyta, Zygnemaphyceae) of France