AP BIOLOGY

Detailed explanation-1: -Petiole connects the lamina or the leaf blade with the stem. It is small and green structure, the upper portion of which continues in the lamina forming midrib while lower portion forms the leaf base. Leaves lacking petiole are called sessile.

Detailed explanation-2: -Sessile leaves lack petioles (leaf stalks). A leaf that is not sessile is petiolate. For example, the leaves of most monocotyledons lack petioles.

Detailed explanation-3: -When the leaf blade is attached directly to the stem, that is, when there is no petiole, like here, the leaf is then called sessile. A petiolate leaf is attached to the stem by a petiole.

Detailed explanation-4: -sessile-a leaf whose blade is attached directly to the stem, lacking a petiole.

Detailed explanation-5: -Plants that have their leaves directly connected to the stem have sessile leaves. They lack a leaf stalk (petiole) that attaches a leaf to the stem. Examples of plants with sessile leaves are grass plants, achyranthes, saffron, etc.