Black alder; European alder

Alnus glutinosa

Black alder; European alder (Alnus glutinosa) is an invasive plant. It is a native of Europe and was first detected in Indiana in 2002.

Alnus glutinosa is a tree that thrives in moist soils, and grows under favourable circumstances to a height of 20m. A. glutinosa is classed as an environmental weed in New Zealand.