Phylum: Charophyta Family: Zygnemataceae
Zygnema C. Agardh
Thalli comprised of unbranched uniseriate filaments. Zygospores are required to identify to species
References:
John, D.M., Whitton, B.A. & Brook, A.J. (2011 second edition) The Freshwater Algal Flora of the British Isles