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A pinnately compound leaf is a type of leaf where the blade is divided into multiple leaflets arranged along a central axis, called the rachis. This arrangement resembles a feather, with leaflets on either side of the rachis. In contrast, a simple leaf has a single, undivided blade. Some pinnately compound leaves can be further divided, creating bipinnately compound leaves. This complex structure is a modification of the basic leaf form found in angiosperms.1

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