Venation is a term used to describe the pattern of arrangement of

1. floral organs

2. flower in inflorescence

3. veins and veinlets in a lamina

4. all of them


(c) Venation The veins are the part of leaf which possess vascular tissues, i.e., xylem and phloem. They are meant for the conduction of water, minerals and food to and from in the leaf. The special arrangement of veins in a leaf is called as venation.
Page 70, XI NCERT