Charophyta

Mesostigmatophyceae
Chlorokybophyceae
Klebsormidiophyceae
Zygnemophyceae
Desmidiales
Coleochaetales
Charales

The Charophyta are a division of green algae, including the closest relatives of the embryophyte plants. As such, they make a paraphyletic group (though they are occasionally restricted to simply the Charales or stoneworts, which are monophyletic). Characteristically, flagellate cells do not occur in this division.

References

Lewis, L.A, McCourt, R.M. (2004) Green algae and the origin of land plants. AMERICAN JOURNAL OF BOTANY 91 (10): 1535-1556 OCT