Different Parts of Leaf - QS Study
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Different parts of leaf

Observing a China Rose leaf will help us recognize its three parts: (1) Leaf base; (2) petiole and 3) Lamina or leaf blade. The Blade, or lamina, is the broad, flat part of the leaf. Photosynthesis occurs in the blade, which has many green food-making cells.

Leaf base: This part of the leaf is attached to the stem or the branch. In some plants a leaf like growth arises from the side of the leaf base. These are stipules. This type of stipule is noticed at the leaf base of pea.

Petiole: The Petiole is the stemlike part of the leaf that joins the blade to the stem. Within a petiole are tiny tubes that connect with the veins in the blade. The cylinder like part of a leaf is petiole. It connects the leaf base and lamina. The petiole of lotus, shapla etc. are very long. The sial kanta leaf has no petiole.

Petiole helps position the leaf in such a way that it can gate sufficient sunlight. Moreover, its main function is to pass on the water and minerals produced in the stem to the leaf blade.

Lamina or Leaf blade: The flat and extended green part next to the petiole is lamina. The vein that runs from the tip of the petiole to the other end of leaf blade is mid vein. From the mid vein originates veins and vein inlets. The edge of the lamina is the leaf margin. Photosynthesis occurs in the blade, which has many green food-making cells. Leaf blades differ from one another in several ways: (1) the types of edges, (2) the patterns of the veins, and (3) the number of blades per leaf.