Description: Blue green algae Scytoemataceae
provided by EOL authors
appearance: cylindrical, untapered, unbranched filaments of auniseriate cells, but with false branching of the firmly sheathed filaments. It has heterocysts
Growth: apical never in place of heteroctysts. Cells divide and break sheath and grow longer.
reproduction may be by simple fragmentation of the tirchomes or filaments, or by hormogonia production.