👉 An acanthus, also known as an amaranthus, is a genus of flowering plants in the family Amaranthaceae. The species within this genus are characterized by their large, glossy leaves that have a dark green to blackish coloration. These plants produce flowers with 5-7 petals, which are arranged in clusters at the base of the plant. Acanthus is often cultivated as ornamental plants due to its attractive shape and vibrant colors.