Transcription factor acting as a flowering repressor, directly repressing FT expression in a dosage-dependent manner in the leaf vasculature. Interacts with JMJ30, but not with SVP, FLC or CO. Specifically expressed in vascular tissues of cotyledons, rosette leaves and cauline leaves. Not detected in the vegetative shoot apical meristem. Expressed 3 days after germination, with a gradual decrease before the floral transition and remains at low levels afterward. Up-regulated by SVP. Down-regulated by high temperature and gibberellic acid treatment. Not regulated by photoperiod, circadian rhythm under long days or vernalization. Early flowering under both long-day and short-day conditions.