Definition: The term "heterosiphonales" refers to a group of plants that have distinct, but not mutually exclusive, reproductive structures. These structures are often referred to as ovaries or pistils and can be found in a variety of plant families, including the family Rosaceae (e.g., roses, lilies), the family Asteraceae (e.g., sunflowers, daisies), and the family Asteraceae (e.g., sunflowers, daisies).