explain the fern diagram
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hope it's helpful!
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The leaves of ferns are often called fronds. Fronds are usually composed of a leafy blade and petiole (leaf stalk). ... The midrib is the main axis of the blade, and the tip of the frond is its apex. The blade may be variously divided, into segments called pinnae; single leaflets are pinna.
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where is the diagrams of the pictures
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