When the midveins, veins and subveins of the leaves are connected to form a net-like structure, it is called reticulate venation. Dicotyledonous plants have reticulate veins. Among monocotyledonous plants reticulate veins are seen in kachu, kumarika etc. There are two types of reticular venation.
(i) Unicoil reticular venation: A reticular venation that has only one central vein along with veins and splenic veins is called unicoil reticular venation. For example, mango.
(ii) Multivenous reticular venation: A reticular venation that has more than one vein like the central vein is called multivenous reticular venation. Polycoccal reticular venation is of two types. These are-
Convergent multiveinal reticulate venation: In the multiveinal venation in which several main veins arise from the base of the leaf blade and meet at the tip of the leaf is called convergent multiveinal reticular venation. For example – kul or plum.
Divergent multiveinal reticulate venation: The multiveinal venation in which more than one main vein originates from the base of the leaf blade and extends to different ends of the leaf is called divergent multiveinal reticular venation. For example, papaya.