Phylum: Charophyta   Family: Desmidiaceae

Bambusina borreri  (J. Ralfs) P.T. Cleve 1864

First described by Ralfs (1848: 58) as Didymoprium borreri. It was moved to Bambusina by Cleve (1864: 496). Cells barrel-shaped with a slight swelling on either side supporting a shallow constriction. Cell-wall with pores in lines. Chloroplast axil with a single pyrenoid. Found in quite long filamentous chains. Zygospore oblong with smooth walls. Occasionally found in multiple reproductions.
Cell dimensions: L: 24-36 µm; B: 16-23 µm. Zygospore: 28-36 x 18-26 µm.
Very common in acidic moorland pools, bogs and loch-margins, often in the plankton.

References: 
Cleve, P.T. (1864). Bidrag till kännedomen om Sveriges sötvattensalger af familjen Desmidieae.
Coesel, P.F.M. & Meesters, K.J. (2023 second edition). Desmids of the Lowlands.
John, D.M. & Williamson, D.B. (2009). A Practical Guide to the Desmids of the West of Ireland.
Ralfs, J. (1848). The British Desmidieae.