Division Phaeophyta is a type of algae commonly known as brown algae. This classification includes a diverse range of seaweeds, including kelp and rockweed. While not a commonly used term outside of the scientific community, there are a few synonyms that can be used in place of Division Phaeophyta. One option is simply "brown algae," which refers to the coloration of the plants due to the presence of the pigment fucoxanthin. Additionally, some may use the term "heterokonts," which refers to the unique membranous structures that are found in the plant cells. Regardless of the terminology used, these seaweeds play an important ecological role in marine environments and are a valuable source of food and commercial products.