From the hand of a known character in this video we can delve a little deeper into the fascinating world of heterostilia, a consistent genetic polymorphism in the presence of two or three floral shapes within a single plant species. Through a fun animation we have the opportunity to learn a little more about sex ... some flowers. In the video, a new methodological tool developed by the Laboratory of Ecology and Evolution at the University of Vigo for further study ... shows the sex of plants! The tool is available at: webs.uvigo.es/plantecology/software.es.html