Chlorophyta, division Chlorophyta - large division of chiefly freshwater eukaryotic algae that possess chlorophyll a and b, store food as starch, and cellulose cell walls; classes Chlorophyceae, Ulvophyceae, and Charophyceae; obviously ancestral to land plants

Charales, order Charales - small order of macroscopic fresh and brackish water algae with a distinct axis: stoneworts

Desmidiaceae, family Desmidiaceae - unicellular algae

class - (biology) a taxonomic group containing one or more orders