Alder (Alnus glutinosa), showing catkins in February.

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Photo credit: © BRIAN GADSBY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: alder, alnus, biological, biology, botanical, botany, branches, brown, catkins, close, close-, deciduous, february, flora, glutinosa, horticultural, horticulture, nature, plant, trees, winter