1. Chlorophyceae includes green algae.
2. These are mostly fresh water (few brackish water and marine).
3. Plant body is unicellular, colonial or filamentous.
4. Cell wall contains cellulose.
5. Chloroplasts are of various shapes like discoid, plate-like, reticulate, cup-shaped, ribbon-shaped or spiral with chlorophyll a and b.
6. Reserved food is in the form of starch.
7. Pyrenoids are located in the chloroplast.
8. Green algae like Chlorella are rich in protein, hence used as food even by space travelers, e.g. Chlamydomonas, Spirogyra, Chara, Volvox, Ulothrix, etc.
