Transcription factor that promotes early floral meristem identity in synergy with LEAFY. Displays a redundant function with CAULIFLOWER in the up-regulation of LEAFY. Required subsequently for the transition of an inflorescence meristem into a floral meristem, and for the normal development of sepals and petals in flowers. Regulates positively B class homeotic proteins (By similarity). Homodimer capable of binding to CArG-box sequences. Expressed in some of the meristems of arrest-stage broccoli heads. First observed in young floral meristem before organs initiation. Accumulates strongly in the sepals of the early stage bud. In more mature buds, expressed on the adaxial side of the sepals, in the petal primordia, and transiently in young stamen primordia.