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Any of several shrubs or trees of the genus Sorbus, in the rose family, native to the Northern Hemisphere. They are widely cultivated as ornamentals for their white flower clusters and bright-orange fruits. Most noteworthy are the handsome American mountain ash, or dogberry (S. americana), and European mountain ash (S. aucuparia), also called rowan, or quickbeam. The European species grows to 60 ft (18 m), twice as high as the American species.
This entry comes from Encyclopædia Britannica Concise. For the full entry on mountain ash, visit Britannica.com.