Photo: Alnus glutinosa 09.
f. pyramidalis. Catkins, not yet fully open. Botanical garden Kaisaniemi, Helsinki, Finland. Planted. 2006-04-22.
Alnus glutinosa (L.) Gaertn.
Engl.: common alder, black alder, European alder.
Deu.: Schwarz-Erle.
Suom.: tervaleppä.
Sven.: klibbal, al, grönal.
Bot. syn.: Alnus alnus (L.) Britt., Alnus rotundifolia Mill., Alnus vulgaris Hill., Betula alnus L. var. glutinosa L.