Cylindrospermum

Cylindrospermum is a genus of filamentous cyanobacteria found in terrestrial and aquatic environments.

[2] In terrestrial ecosystems, Cylindrospermum is found in soils, and in aquatic ones, it commonly grows as part of the periphyton on aquatic plants.

The genus is heterocystous (nitrogen-fixing) cyanobacteria.

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Illustration of "Cylindrospermum stagnale". h , heterocyst; sp , resting spore