Calla Lily on Gray1928 by Georgia O'Keeffe

O’Keeffe painted a star on the back of this canvas. Throughout her career, she used this personal code when she was pleased with the way a work had turned out.
[http://www.mfa.org/collections/object/calla-lily-on-grey-35101]
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Media: oil on canvas
Dimensions (h/w/d): 32 17 (81 43)
Location: Museum of Fine Arts , Boston