European black alder is monoecious with flower buds present during the dormant winter season. This picture shows the newly formed male and female catkins. The male (staminate) flower buds are pendulous catkins in clusters of 3-5 that are produced in fall. They turn brown, hang on all winter and serve as an excellent identification feature. The female buds in this picture are the small green, ovoid structures in a cluster of three in the upper left corner.
Karren Wcisel, TreeTopics.com
Image Creation Date
Alnus glutinosa, European alder, black alder, deciduous, tree