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A fusiform initial is an elongated, tapering cell found in the cambium of plants. Through repeated cell division, these initials give rise to vertically arranged cells within the plant's vascular tissue. This process is crucial for the secondary growth of woody plants, contributing to the formation of wood and inner bark. The fusiform initials are one of two types of cells in the vascular cambium, the other being ray initials, which form the radial system of the bark and wood.12

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