Phylum: Charophyta   Family: Desmidiaceae

Cosmarium ordinatum var. schulzii (Messikommer) Kurt Förster 1973

An unusual variety where the surface granules are partite. Found in the tychoplankton of oligotrophic lochs and lochans, but rarely recorded.

References: 
Förster, K. (1973) Desmidieen aus dem Südosten der Vereinigten Staaten von Amerika
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium