Welcome to the CSM Library research guide for Biology 220, focusing on plant classification.
Figure 1.Leaf-shape variation: Illustration showing various leaf shapes. (a) Simple leaf with a single blade and petiole. (b) Peltate leaf. The insertion point of the petiole (dashed line) occurs on the underside of the leaf. (c) Compound leaf. A compound leaf has multiple blade units called leaflets. (d) Palmately compound leaf. Each leaf blade radiates out from the petiole.
Image from the Access Science Database, entry on "Regulation of leaf shape."
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