•PHYLLOTAXY: Mode of arrangement of the leaves on its stam and its braches is called phyllotaxy.
•VENATION: Pattern of the veins and veinlets in the lamina of leaf is called venation.
•RETICULATE VENATION: Veins are irregularly distributed to form a network. Unicostate : When it has only one main midrib. Multicostate: When several main veins are of same thickness.
•PARALLEL VENATION : Veins runs parallel to each other do not form network. It is also two types unicostate and multicostate.
•CONVERGENT VENATIONS: Main veins runs parallel and converge at the apex
•DIVERGENT VENATION: All the main veins spread out towards the margin.