Venation The arrangement of veins and the veinlets in the lamina of leaf is termed as venation. When the veinlets form a network, the venation is termed as reticulate . When the veins run parallel to each other within a lamina, the venation is termed as parallel. Leaves of dicotyledonous.plants generally possess reticulate venation, while parallel venation is the characteristic of most monocotyledons.
