Leaves can have one, two, or three main parts. The most obvious part of most leaves is the blade or lamina. Those terms are interchangeable. Most leaves have a petiole which connects the leaf to the stem. Some leaves also have stipules, which look like small leaves growing from the base of the petiole.
Leaves connect to the stem at "nodes."
The blade (or lamina) is where the leaf action takes place, though it's not a spectator sport.
The process is photosynthesis. That's using energy from the sun to make food.
Chlorophyll, the green stuff in a leaf, turns sunlight into energy. The leaf uses that energy to break up carbon dioxide from the air and water in the ground, then remix the elements into sugar, which the plant uses as food. It sucks in carbon dioxide from the air through little holes on the bottom of the leaf called stomata. The water is piped up to the leaves from the roots, which pull it out of the soil.
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The Lamina (Epipodium) of A Leaf (With Diagram) !
A leaf lamina should be studied from the following aspects:
(1) Shape;
(2) Base;
(3) Margin;
(4) Apex;
(5) Surface;
(6) Texture;
(7) Colour;