Give various parts of leaf.

Leaves become modified into spines in

Which of the following is the modification of leaf?

If the ......$X$.... of the lamina reach up to the ... $Y$...breaking it into a number of ......$Z$...... the leaf is called compound leaf.

Importance : 

$(i)$ Rhizom

$(ii)$ Stipular tendril

Free lateral stipules occur in