Cells small, irregularly dispersed in homogeneous jelly
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Cells small, packed densely in mucilage, forming randomly shaped colonies.
Microcystis -
Cells small, in mucilaginous colonies which are large, rubbery and lobed ("brain"-like); cells divide in only one plane.
Aphanothece -
Small cells in mucilaginous masses, often attached to surfaces; cells are in clusters, dividing in perpendicular planes in successive cell divisions.
Aphanocapsa