Phylum: Chlorophyta   Family: Oedogoniaceae

Oedogonium boscii V.B. Wittrock ex K.E. Hirn 1899

First described and illustrated by Wittrock in Hirn (1900: 122, pl. 13: 73-74). A strikingly large oogonium with striations.
Dimensions: cells: L: 111-142 x B: 10-19 µm. Oogonia: L: 75-110 x B: 39-51 µm; Oospores: L: 51-70 µm; B: 36-50 µm.
Found in moorland pools and disused peat-cuttings. Infrequently recorded in the Outer Hebrides.

References: 
Hirn, K.E. (1900). Monographie und iconographie der Oedogoniaceen.
John, D.M., Whitton, B.A. & Brook, A.J. (2011 second edition). The Freshwater Algal Flora of the British Isles.