Green Algae
The grass-green chloroplasts of green algae have an ultra structure and pigment composition much like the chloroplasts of land plants. Molecular systematics and cellular morphology leave little doubt that green algae and land plants are closely related. In fact, some systematists now advocate including green algae in an expanded "plant" kingdom, Viridiplantae. Phylogenetically, this change makes sense, since otherwise the green algae are a paraphyletic group.