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Diagnostic features

Colonies often macroscopic, comprised of groups of ovoid cells within concentric mucilage envelopes. Numerous small colonies may be enclosed within larger masses of mucilage. Mucilage rings may have a warty appearance. Cells and inner layers of mucilage may be deep red, yellow, or violet. Usually attached to plants or rocks.

Typical habitats

May occur in semi-terrestrial sites subjected to only periodic submersion


Kingdom Bacteria
Phylum Cyanobacteria
Class Cyanophyceae
Order Chroococcales
Family Microcystaceae
Common name Cyanobacteria