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Common Alder Alnus glutinosa Betulaceae Height to 25m. Spreading, often multi-stemmed tree. Bark Brownish, fissured into squarish plates. Branches Ascending in young trees. Young twigs sticky. Buds 7mm long, on 3mm-long stalks. Leaves Stalked, to 10cm long, rounded with notched apex. Reproductive parts Purplish male catkins, in bunches of 2–3, appear first in winter. Female catkins cone-like, reddish at first ripening green by summer. Status Common beside water.