Probable transcription factor that promotes early floral meristem identity in synergy with APETALA1, FRUITFULL and LEAFY. Is required subsequently for the transition of an inflorescence meristem into a floral meristem. Seems to be partially redundant to the function of APETALA1 (By similarity). Homodimer capable of binding to CArG-box sequences. Expressed in some of the meristems of arrest-stage broccoli heads. Accumulates in early floral primordia and fades out in cells that will give rise to stamens and carpels. CAULIFLOWER may contribute to the shape of the floral meristem. This trait has likely been selected by early farmers during the domestication of modified inflorescence structures.