These plants are functionally dioecious, flowers imperfectly unisexual. Plants are monoecious with separate unisexual flowers. They have usually unisexual flowers and can be both monoecious or dioecious. The plants are monoecious, with unisexual flowers that develop in dense racemes. The bay laurel is dioecious (unisexual), with male and female flowers on separate plants. Members of the birch family (Betulaceae) are examples of monoecious plants with unisexual flowers. The tihue bears bundles of small yellow unisexual or hermaphrodite flowers. The remaining 15% would therefore be dioecious (each plant unisexual). The flowers are apetalous and unisexual and borne in panicles. As in other wild cattle ungulates that form unisexual herds, considerable sexual dimorphism was expressed. Its flowers are unisexual and radially symmetric. This genus contains the only species of Crassulaceae that have unisexual flowers. The flowers are unisexual and greenish in color. More complex reproductive strategies include secondary pollen presentation, heterodistyly, and unisexual flowers. The flowers are unisexual, apetalous, and grouped in clusters.