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Charophyceae
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fragile stonewort spirogyra
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fragile stonewort
fragile stonewort Fragile stonewort (Chara globularis), a green alga.

Charophyceae

class of green algae
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Charophyceae, class of green algae (division Chlorophyta) commonly found in fresh water. The taxonomy of the group is contentious, and the class is sometimes placed in its own division, Charophyta. Charophyceae is thought to be the closest extant group of organisms ancestral to bryophytes (primitive terrestrial plants).

spirogyra
spirogyraSpirogyras are filamentous green algae, named for their spiraling chloroplasts.

Members can be unicellular (desmids), filamentous (Spirogyra), colonial, or multicellular and plantlike (stoneworts). Many species have flagellated cells and store starch in characteristic plastids.

This article was most recently revised and updated by Melissa Petruzzello.