Alnus glutinosa (L.) Gaertn.
Family: Betulaceae
black alder,  more...
[Alnus alnus (L.) Britton,  more]
Alnus glutinosa image
Botanical Illustration  
Etymology: Alnus: ancient Latin name derived from the Celtic, "growth along streams"
Plants: perennial tree to 40'-60' tall, often with several trunks and a narrow crown; dark brown, smooth bark becoming darker and breaking into fissures with time; pale, horizontal lenticels
Leaves: leaf obovate to nearly oval, leathery, edges coarsely and often irregularly doubly toothed; heavily coated with resin on top and bottom
Flowers: winter buds stalked; male catkins in 1 or more clusters 1 1/2"-5" long; blooms in early spring
Fruits: oval to nearly round, stalked fruit clusters; samaras obovate, wings only narrow, thickened ridges
Habitat: moist to wet; streambanks, floodplains, wetland edges
Conservation Status: Introduced - locally established; potentially invasive
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Robert W. Freckmann  
Alnus glutinosa image
Alnus glutinosa image
Michael Clayton  
Alnus glutinosa image
Kurt Stüber  
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Alnus glutinosa image
Botanical Illustration  
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Paul Drobot  
Alnus glutinosa image
Robert R. Kowal  
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
Alnus glutinosa image
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