Type species: Nostoc commune Vaucher ex Bornet et Flahault 1888. - More than 200 described species, from which about 40 are recognizable according to present knowledge. Taxonomic revision not yet finished. Probably two subgenera.
Type species: Nostoc commune Vaucher ex Bornet et Flahault 1888. - More than 200 described species, from which about 40 are recognizable according to present knowledge. Taxonomic revision not yet finished. Probably two subgenera.