Promotes flowering transition in long days (LD). Interacts with MADS domain transcription factors during flower development. Component of a complex made of FLOR1, VSP1 and AGAMOUS (AG). Binds directly with AG. In carpels, observed both in cytoplasm and nucleus, as well as in the perinuclear and cell membrane in a vesicle-like pattern. In style cells, present in cytoplasm as well as in nucleus possibly in the perinuclear membrane. In leaf tissue, observed in the plasma membrane and in the perinuclear membrane. In roots and tapetum cells, restricted to the cytoplasm. Confined to flowers and inflorescences (e.g. inflorescence meristems, floral meristems, stamens and carpels). Induced in the early inflorescence meristem (PubMed:22319055). First present when floral induction occurs in inflorescence and floral meristems. Strongly expressed upon flower induction in inflorescence meristems along two lateral strips on the L3 of the flank meristem, where flower primordia are initiated. In the L3 of the central initiation zone, also present at lower levels. Accumulates at high levels in the L3 of stages 1-4 of flower meristems. In developing flowers, detected from stage 3. By stages 7 and 8, specifically observed in stamen and gynoecium primordia. In stamens, restricted to the anthers, probably to the endothecium, tapetum and the middle layer. In carpels, first uniformly expressed in carpel primordia, but later restricted to the placentae, the funiculus and to the inner and outer integuments (Ref.7, PubMed:22319055). By shift to long days (LD). Delayed flowering. 'Flor' means flower in Spanish. Belongs to the polygalacturonase-inhibiting protein family.