Alder catkins and cones (Alnus glutinosa)

Alder catkins and cones (Alnus glutinosa)

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Credit: BOB GIBBONS/SCIENCE PHOTO LIBRARY

Caption: Catkins and cones from a black alder tree (Alnus glutinosa). The male catkins (left), which are comprised of many flowers, produce pollen to pollinate female catkins. Once pollinated, the female catkins develop into woody false cones (right). In the autumn the scales of the cones open and disperse their seed.

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Keywords: alnus glutinosa, biological, biology, black alder, botanical, botany, catkin, catkins, cone, cones, false cone, female, flower, flowers, male, nature, pollen, pollinated, tree

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