Black alder is a common name for several plants and may refer to:
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Alnus glutinosa
''Alnus glutinosa'', the common alder, black alder, European alder, European black alder, or just alder, is a species of tree in the family Betulaceae, native to most of Europe, southwest Asia and northern Africa. It thrives in wet locations ...
'', native to Europe and widely naturalized
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Ilex verticillata'', native to eastern North America
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