The haptonema is a structure found in green algae. Phacus is a member of the Division Euglenophyta. Unarmored dinoflagellates are so termed because they have no cell wall at all. Algin and alginates are derived from red algae. Brown algal motile cells have two whiplash flagella.
Kelps have a heteromorphic alternation of generations life cycle.
The food reserve of the brown algae is called paramylon. Ectocarpus has an isomorphic alternation of generations. Macrocystis and Nereocystis are members of the Division Phaeophyta. Dictyota is a brown alga which grows by division of a single large apical cell. Fucus plants are diploid.