Types of Venation


 
 
Concept Explanation
 

Types of Venation

The arrangement of veins and veinlets in the lamina of leaf is called venation. The midrib, veins and veinlets contain vascular tissues, i.e., xylem and phloem for conduction of  water, mineral salts and food.

Leaves have mainly two types of venation

i. Reticulate VenationWhen the veinlets form a network, the venation is called réticulate. It is found in dicot leaves. However, some monocot leaves like Smilax, Dioscorea and Alocasia also show reticulate venation.

ii. Parallel VenationWhen the veins run parallel to cach other within a lamina the venation is termed as parallel, e.g., Calophyllum, Zingiber officinale, etc. It can be of the following types as shown in the figure below.

 

 
 
 


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