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(family Rosaceae)

A genus of perennial herbs that have pinnate leaves with small leaflets alternating with the larger pairs, and long racemes of 5-petalled flowers with many stamens; the receptacle bears hooked spines that persist and become woody in the fruit, as does the deeply hollowed receptacle. There are about 15 species, occuring in the northern temperate zone.

Subjects: Plant Sciences and Forestry.

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