Subclass Magnoliidae is a group of flowering plants that includes more than 9,000 species. Magnoliidae plants are characterized by having petals and sepals that are often indistinct, and having more than one ovule per carpel. Some synonyms for Subclass Magnoliidae include Magnoliophyta, Angiospermae, Anthophyta, and flowering plants. These synonyms are all used to refer to the group of plants that produce flowers and seeds. Magnoliidae plants are widely distributed across the world, and they play an important role in many ecosystems. In addition to being beautiful and diverse, these plants also provide food and habitat for a wide range of animals and insects.