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The following terms are used to describe leaf morphology in the description and taxonomy of plants. Leaves may be simple (that is, the leaf blade or 'lamina' is undivided) or it may be compound (divided into two or more leaflets).
Leaf shape can vary considerably. The most common shapes include oval, truncate, elliptical, lanceolate, and linear. Leaf tips and bases may also be unique, with names based on their...
Lobed, Toothed, or Entire Leaves. You can identify a tree by its leaf shape. From left to right: unlobed leaf, lobed leaf and toothed leaf. One very important way to identify types of tree leaves is by the overall shape of the leaf around its edges.
Leaf Shapes. Other than these three main leaf types, there are many subcategories. Identifying any plant species becomes much easier if you can figure out precisely what kind of leaf shape it has. We list each of these and describe them to understand them and some tree species they represent. 1. Linear Leaves
There are several general leaf shapes (Figure \(\PageIndex{17}\)). The widest part of ovate leaves is near the based whereas the widest portion of obovate leaves is near the apex (tip). If the widest portion of the leaves is equidistant form the apex and base, the leaf may be elliptic or oblong.
Try and identify the leaves you find using the downloadable guide. Handle the leaves and get to know their colours, size and shape. Notice the details of the leaves – their stems and how they attach to the leaf. Look at the arrangement of the veins running through the leaf.
Here are some of the various leaf shapes explained. Acicular (Needle-Shaped) These leaves are needle-shaped, and some examples include the Japanese cedar, and the jack pine.