Rose leaf. Coloured scanning electron micrograph (SEM) of the edge of a serrated leaf of a Garden Rose, Rosa sp. The term 'serrated' refers to the sharply cut indentations in the margin of a leaf, as found in the Garden Rose and certain other plants. Leaf shapes, including their edges, are important features in the recognition of plants. Serrated leaves, like thorns, may play a role in protecting the plant against being eaten by herbivores. The raised structures on this leaf are the leaf veins. Magnification: x10 at 6x9cm size. Magnification: x31 at 13x25cm size.