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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.
Summaries of State Plant Protection Laws and Regulations
Wisconsin  
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