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Cover Floral homeotic mutations in Antirrhinum majus. (Central photo) Part of the inflorescence of a flo mutant (left) and wild type (right). All but one of the structures axillary to the bracts have been removed from each plant for clarity. (Insets, right) def-621 (top) and sep-620 (bottom) flowers. (Iuset, left) sep-619 flower. (For details, see Carpenter and Coen, p. 1483.)