Monocots don't have petioles in the same way dicots do. Instead, they have a sheathing leaf base, which wraps around the stem and forms a protective covering.

Here's a breakdown:

* Dicots: Their leaves have a distinct petiole, a stalk that attaches the blade to the stem.

* Monocots: Their leaves lack a distinct petiole. Instead, the base of the leaf expands and forms a sheath that encloses the stem. This sheath is often called a leaf base or sheathing base.

Therefore, there isn't a direct counterpart to the petiole in monocots. The sheathing leaf base is the analogous structure that performs similar functions to the petiole in dicots.