Carpinus betulus is monoecious. It produces separate male and female flowers, called catkins, on the same plant. The catkins are not present during the dormant season but become evident when they emerge from buds in spring. The female flowers are not showy; however, the male flowers can be attractive in bloom. This image shows the male catkins beginning to bloom and elongate in early spring.
Karren Wcisel, TreeTopics.com
Image Creation Date
Betulaceae, Carpinus betulus, European hornbeam, common hornbeam, deciduous, tree