Acts as a transcriptional repressor. Prevents the photoperiodic and circadian clock-dependent transition to flowering in long days (LD) by repressing the expression of flowering time genes (e.g. FT, GI and CO) in the leaf vasculature, and by interfering with floral meristem identity genes at the apex (e.g. SOC1 and LFY). Mostly expressed in leaves and flower buds, and, to a lower extent, in seedlings and shoot apex, but not in roots and floral primordia. In seedlings, present in cotyledons and in the hypocotyl. Later expressed specifically in the leaf vasculature, the vegetative shoot apical meristem and emerging leaf primordia. At the onset of flowering, observed at the shoot apex, but excluded from the first visible floral buds of the bolting inflorescence. In flowers, confined to the vasculature of the sepals. Contains a slightly degenerated ERF-associated amphiphilic repression (EAR) motif, which may be involved in the activity of transcriptional repression.