Venation in leaves
The arrangement of veins on the leaf lamina is called venation. It is of two different types: RETICULATED venation: it is also called as web like venation. In this type, there is a central thick vein called midrib in the centre of the leaf . From the midrib arises lateral veins on both sides which inturn has small veinlets appearing like web. This type of venation is present in dicot plants. Ex. Rose, mango, peepal,etc PARALLEL venation: in this type, there is no midrib in the centre instead all the veins run parallel to each other on the whole leaf. Thus type of venation is present in monocot plants. Ex. All grass family plants like rice, wheat , jowar etc.