In 1830, John Henslow introduced his student Charles Darwin in the fascinating world of flower polymorphisms. Specifically it presented the case of some species of plants that have two hermaphrodites floral shapes that differ in height and arrangement of female sexual structures: the pistils. In a floral shape, the stigmas are located above the male structures (the stamens), while in the opposite way, the stigmas are located below the stamens. Trying to decipher the origin and consequences of this fascinating reproductive mechanism that some plant species have undoubtedly contributed to shaping the curious and critical nature that led Darwin to formulate young years later his hypothesis of Natural Selection. Since then, a host of researchers are still trying to unravel the mysteries surrounding this refined reproductive mechanism. In this video he explains what heterostyly: a floral polymorphism Darwin drew attention to the point that he dedicated a book to study. In the video one answering review questions What ?, What is it done? How does it originate? o How can you study? Heterostyly is consistent in the presence of two or three floral shapes within a single plant species polymorphism. The advantages of this system of play, and its origin are issues of scientific controversy. In the video the contributions made on this topic the Group of Ecology and Evolution at the University of Vigo (webs.uvigo.es/plantecology/) are explained