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Arboretum
"A man does not plant a tree for himself, he plants it for posterity." - Alexander Smith
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European Alder
(Alnus glutinosa)
Donated by
Kaskaskia College Secretaries
Tree Map Location: #
24
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Leaf:
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Alternate, simple, oval to orbicular, 2 to 4 inches long, 2 to 3 inches wide, rounded or slightly notched tip, doubly serrate margin, dark green above, lighter below with some scruffy pubescence in vein axils.
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Flower:
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Monoecious; males slender, reddish-brown catkins (1 to 1 1/2 inch long), much longer when shedding pollen; females small (1/6 inch) reddish-brown, cone-like catkins in clusters near branch tips.
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Fruit:
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Cone-like woody catkin, initially green, turning brown when ripe, 3/4 inch long, egg-shaped, contain many small winged nutlets, persistent through winter.
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Twig:
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Green and sticky when young, later turning greenish brown; buds are stalked, purplish brown in color and somewhat three sided.
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Bark:
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Initially smooth and grayish green, later turning grayish brown and developing irregular, small broken patches.
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Form:
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Medium tree with a very narrow, upright crown; in its native habitat it reaches 80 feet tall and several feet in diameter; rarely get very large in North America.
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Source:
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College of Natural Resource Virginia Polytechnic Institute and State University
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To participate in the Kaskaskia College Arboretum please contact:
Office of Institutional Advancement
618-545-3069
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