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Amelanchier (June berries; family Rosaceae) A genus of non-thorny, deciduous, small trees or shrubs with simple leaves and flowers that are pentamerous, with 2–5 carpels united to the receptacle below but free from it above, each carpel divided into 2 cells by a false septum. The flowers are also in racemes, distinguishing the genus from Crataegus and Cotoneaster. Several species are cultivated for their flowers, often becoming naturalized. There are 6 species, occurring in the north temperate zone; most are N. American, but one occurs in Europe.