If the veins of the leaves are arranged parallel without being connected to each other, it is called parallel venation. Monocots have parallel veins. Among dicotyledonous plants, parallel venation is seen in Sultana chapa plants. There are two types of parallel veins.
(i) Monovenous Collateral Venation: A parallel vein that has only one central vein is called Univenous Collateral Venation. For example, bananas.
(ii) Multivenous parallel venation: A parallel venation that has more than one major vein is called multivenous parallel venation. There are two types of multivenous parallel venation.
Convergent multiveinal parallel veining: In the multiveinal venation in which more than one main vein originates from the base of the leaf blade and joins at the top of the blade is called convergent multiveinal parallel veining. For example, bamboo.
Divergent multiveinal parallel venation: The multiveinal venation in which more than one main vein originates from the base of the leaf blade and spreads to different ends of the blade is called divergent multiveinal parallel venation. For example, rhythm.