Phylum: Charophyta Family: Desmidiaceae
Cosmarium reniforme (large form) (Ralfs) W. Archer 1874
A number of these larger forms have been reported from across Europe from varying habitats. The Harris population from dripping rocks are all consistently larger than the recognise size-range for the nominate variety. Kouwets (in manuscript) is proposing a new name: Cosmarium fungiforme.
Kouwets, F.A.C. (in manuscript) European Flora of the Desmid Genus Cosmarium.