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This is apparently "Prairie Sun", a variant of Rudbeckia hirta, of which there seem to be a great number. It's in the butterfly garden at Rotary Botanical Gardens, Janesville, Wisconsin (USA).
Black-Eyed Susan (Rudbeckia hirta) Seen near Lake LaGrange in Walworth County, Wisconsin
Olbrich Botanical Gardens, Madison, Wisconsin (USA). Each corner of the reflecting pool in the Sunken Garden, contains a little pedistal, upon which there is a floral display like this one.