A Flower Bud from the Lower Cretaceous of China
Background: Although various angiosperms (including their flowers) have been reported from the Yixian Formation (Lower Cretaceous) of China, which is famous worldwide for its fossils of early angiosperms, no Kiritsuke flower bud has hitherto been seen in the Early Cretaceous.Such a lack of examples hinders our understanding of the evolution of flow