Question

What is lamina?

Answer 1

Plant parts are divided into leaves, stem, and roots. Leave is the green-colored, flat structure developed from the nodes of the stem or branches. They have limited growth and are arranged acropetally. At the axils of the leaves, axillary buds are found.

Complete answer:
Leaf is divided into four parts; Leaf base, Stipule, Petiole, Lamina.
• The basal part of the leaf is called leaf base, the leaves are attached to the stem at the node by means of leaf bases.
• The small, green, lateral appendages present on both sides of the leaf base are called stipules, they protect the axillary buds in the developing stage.
• The stalk of the leaf is called petiole; petiole connects the lamina to the stem that allows the leaf lamina to flutter in wind, thereby cooling the leaf and bringing fresh air to the surface. It bears the weight of the lamina and conducts water and food material between the stem and leaf.
• Lamina is the green expanded part of the leaf, it is also known as leaf blade. The important function of the leaf is only performed in lamina like photosynthesis. At the center of lamina a vein is presently called Midvein or midrib, and if the branches are developed from the midrib is called Lateral Veinlets.

Additional information:
Leaves perform functions;
• They carry photosynthesis.
• They control the diffusion of oxygen and carbon dioxide.
• Internal transportation of water and minerals by transpiration is also performed by the leaf.

Categorize of Leaves
• Cauline leaves: Leaves developed on the stem, such type of leaf is called Cauline leaf.
• Ramal leaves: When leaves are developed from the branches are called Ramal leaves.
• Radical Leave: Leaves developed from the root; this type of leave is called radical leaves.

Note: Leave appears without stipules, this type of leave is called Exstipulate and if stipules fall off by the time lamina expands. Stipules remain as long as the leaf, this stipule is named persistent stipule.