Alder cones are the catkins of black alder trees (Alnus glutinosa). These trees naturally occur in Europe but are also an introduced species in many parts of the United Stated and Canada.

Wildlife – Alder provides many benefits to wildlife. The pollen from the catkin is an early source of pollen for bees, and if the branches are above a stream or river, the seeds are a food source for fish. Alder is a good species for reforestation, and provide excellent shelter for wildlife in wet areas.