These veins are smaller and run lengthwise on the leaf. Parallel venation occurs when veins are arranged parallel to each other. Venation can be of three types: parallel, pinnate, and palmate. What is Venation?Īs mentioned earlier, the pattern of veins is different for different kinds of leaves. It is helpful in tree leaf identification. Some plants may also have stipules, flap-like structures that grow at the base of the petiole. They also enable water transport to the leaf from the roots. It is composed of tiny tubes that connect the veins to the stem. The petiole is a stalk-like structure that connects the leaf to the branch. Veins can be of different types depending on the number of blades and pattern of veins. There is a midrib that goes all the way in the middle through which other branches arise. The leaf blade, also called the lamina is broad and flat. A leaf can broadly be divided into two parts: the leaf blade and the petiole. Structure of a leafīefore getting into the details and all the technical jargon related to leaves and their parts, we must understand the structure of a leaf. Leaves performs various functions which include making food, interchange of gases between the atmosphere, the plant body and evaporation of water. Leaves help in photosynthesis, which keeps the tree alive. They have their unique shape, unique margin, venation, colour, and arrangement on the branch. Since we are on the subject of leaves, let’s look into its types and functions. The very main purpose of a tree is to grow high enough so that it can catch the sunlight. In fact, most the trunk and the branch exists to support the leaves. It is a no-brainer that leaves are one of the most important parts of a tree.
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