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 whe ...
'', native to Europe and widely naturalized
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Ilex verticillata
''Ilex verticillata'', the winterberry, is a species of holly native to eastern North America in the United States and southeast Canada, from Newfoundland west to Ontario and Minnesota, and south to Alabama.
Other names that have been used incl ...
'', native to eastern North America
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