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Flower phenotype of the Arabidopsis thaliana (No-0) flower-in-flower (fif) mutant. (a) Overview over a representative fif mutant “inflorescence” displaying different flower types 1 to 4. (b) Floral organs of the primary fif flower (1) and different secondary fif flowers (2–4). (c) Flower of the wild type No-0 accession. (d) Primary flowers of the fif mutant with stems that outgrow from axillary bract meristems (red arrow heads) and carry secondary flowers. Size bar: 1 mm.
