Cylindrospermum paludicola Komárek

Komárek, J. (2012). Nomenclatural changes in heterocytous Cyanoprokaryotes (Cyanobacteria, Cyanophytes). Fottea 12(1): 141-148. http://fottea.czechphycology.cz/_contents/F12-1-2012-11.pdf
Descriptions: Filaments in blue–green or olive green mats. Trichomes slightly flexuous, cylindrical, slightly constricted at cross–walls. Cells cylindrical, blue–green or grey–blue, ± isodiametric or longer than wide, 1.6–7 × 2.2–3 µm. Terminal cells conical or cylindrical and rounded. Heterocytes ovoid to cylindrical with rounded ends, 4.8–8 × 2.8–4.5 µm. Akinetes oval cylindrical, solitary up to 3 in a row, 12–36 x 7–11.5 µm, with smooth, brownish exospore. – On wet soils, sometimes among mosses and in pools with sandy bottom, distributed in northern parts of temperate zone in Europe and North America.