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Term Definition
Blade The expanded portion of a leaf or other structure such as a petal; when it is a leaf the stalkt is called the petiole and when it is a petal the narrowed part is the claw. Same as lamina. Actinodromous leaf venation. Photo by S. A. Mori.
Leaf blade The expanded portion of a leaf, it and the petiole combined equal the leaf. Same as lamina. Actinodromous leaf venation. Photo by S. A. Mori.