vascular leaf initiation stage PO_GIT:556 A vascular leaf development stage (PO:0025570) which begins with the onset of the vascular leaf anlagen formation stage (PO:0001003) and ends with the termination of the vascular leaf primordium polarity determination stage (PO:0001052). leaf initiation in Arabidopsis (related) Localized cell divisions in the peripheral zone (PO:0000225) transition from anticlinal to periclinal divisions. PO:0001051 plant_structure_development_stage vascular leaf development stage