A new species of Anabaena (Cyanophyta, Nostocaceae) from a

The lake has an open water area of about 35 ha. The open water is sur­ rounded, except -for one short stretch, by a wide cattail swamp. The lake has a maximum depth of 4·3 m. Most of the lake is shallow, however, 0·3-1·0 m. The lake is for