Within the Alnus glutinosa article...


'Imperialis'

Leaves deeply and pinnately lobed, the lobes lanceolate, slender, pointed, not toothed, reaching more than half-way to the midrib; stalks 1 to 1{1/2} in. long. Often a thin, rather ungainly tree, never of great size. A well-known garden clone, in cultivation since before 1859.

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