A challenge class in a rose show is a class specified as such which typically requires an entry of a collection of roses meeting certain prescribed criteria.  A challenge class entry differs from a standard horticultural entry in two important respects: (1) the specification of roses to comprise the entry and (2) the staging of the entry.  In a challenge class, each specimen is judged separately by reference to the full scale of points. However, because each specimen is usually one of a collection, the judge is also called upon to consider the group as a whole.  Because of the latter requirement, it is fundamental that the exhibitor be allowed to stage an entry in a challenge class.

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