lamina
Quick Summary
The lamina is the blade of a plant leaf. It is the primary surface where photosynthesis occurs. The lamina is typically broad and flattened, oriented perpendicular to the stem. Within the lamina, specialized cells called chloroplasts are responsible for photosynthesis, containing pigments like chlorophyll. The internal structure of the lamina includes veins, which are vascular bundles containing xylem and phloem for transporting water and nutrients. The mesophyll, the tissue between the upper and lower epidermis, is composed of cells that facilitate gas exchange and photosynthesis. The shape and structure of the lamina can vary greatly depending on the plant species and its environment.123
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angiospermLeavesThe blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.
Read MoreThe blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.
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CyperaceaeCharacteristic morphological features…have sheathing leaves, usually with blades; but members of a substantial number of genera, including Caustis, Eleocharis, Lepironia, Schoenoplectus, and Trichophorum, may be bladeless or nearly so. The sheaths are uniformly closed except in the small African genus Coleochloa. As in grasses, many genera have a small flap of tissue…
Read More…have sheathing leaves, usually with blades; but members of a substantial number of genera, including Caustis, Eleocharis, Lepironia, Schoenoplectus, and Trichophorum, may be bladeless or nearly so. The sheaths are uniformly closed except in the small African genus Coleochloa. As in grasses, many genera have a small flap of tissue…
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PoaceaeCharacteristic morphological features…the grass leaf is the blade. Grass leaves are borne singly at the nodes and, with minor exception, are arranged in two vertical ranks. Thus, a leaf, and most conspicuously its blade, is positioned directly under the blade two nodes above it. Structurally, this means that the point of leaf…
Read More…the grass leaf is the blade. Grass leaves are borne singly at the nodes and, with minor exception, are arranged in two vertical ranks. Thus, a leaf, and most conspicuously its blade, is positioned directly under the blade two nodes above it. Structurally, this means that the point of leaf…
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