Phaeophyceae

**Definition:** A class of predominantly marine EUKARYOTA, commonly known as brown algae, having CHROMATOPHORES containing carotenoid PIGMENTS, BIOLOGICAL. ALGINATES and phlorotannins occur widely in all major orders. They are considered the most highly evolved algae because of their well-developed multicellular organization and structural complexity.

**Tree numbers:** - B01.750.600

**Synonyms:** - Phaeophyta - Algae, Brown - Brown Algae