Internode inner zone (Z2) area Internode InterNodZ2Area Inner zone (Z2) area of the internode cross section Internode inner zone (Z2) area, obtained after fasga staining of the internode. Outer and inner zones are delimited visually based on their anatomical differences. Internode rank and time of observation must be provided when using this trait. Internode stands here for internode of the main shoot. acronym entity scale_of attribute variable_of method_of