Classification of leaves according to shape
What are the types of leaf shapes?
Leaf shape can vary considerably. The most common shapes include oval, truncate, elliptical, lancolate, and linear. Leaf tips and bases may also be unique, with names based on their shapes. Leaf arrangement is mainly limited to two basic petiole attachments: simple and compound.
How do you describe the shape of a leaf?
Linear/ensiform: long and narrow with margins more or less parallel, the tip usually pointed. Lanceolate: longer than wide, widest toward the base, the apex tapered to a point. Falcate: uniformly curved (sickle-shaped). Ovate: like a longitudinal section through an egg – broader below the middle.
What is the shape of leaves called?
Leaf and leaflet shapes
| Term | Latin | Description |
|---|---|---|
| laminar | Flat (like most leaves) | |
| lanceolate | lanceolatus | Long, wider in the middle, shaped like a lance tip. |
| linear | linearis | Long and very narrow like a blade of grass. |
| lobed | lobatus | Being divided by clefts, may be pinnately lobed or palmately lobed. |
How many types of leaf shapes are there?
There are two different types of leaves – simples leaves and compound leaves. The other types of leaves include acicular, linear, lanceolate, orbicular, elliptical, oblique, centric cordate, etc.
Why are there different shapes of leaves?
The shape of a tree’s leaves is determined by its function and by its environment, it is determined by evolution and by perfection. A tree cannot afford to be less than 100% effective, if it is, it will simply lose out to it the competition and become extinct. It is different strokes for different folks!
What is an oval leaf shape?
Definition. Ovate refers to a leaf, sepal, petal, or other flat structure that is wider at the base than at the midpoint, tapers toward the apex, and has a length-to-width ratio of 1.5:1 to less than 2:1.
What is a rhombic leaf shape?
Rhombic. An oblique four sided shape, broadest about the middle, with approximately equal sides and lateral obtuse angles.
What is the shape of compound leaves?
Leaves can be either simple or compound in shape. Simple leaves have a single leaf blade, while compound leaves have many leaflets.
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Leaf Shapes.
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Leaf Shapes.
| Simple leaf shapes | Compound leaf shapes |
|---|---|
| Entire leaf | Singly compound leaf |
| Palmate (heart shaped) | Palmately compound leaf |
| Palmately lobed | Doubly compound leaf |
| Pinnately lobed |
What are 3 types of leaves?
Leaves are classified as either alternate, spiral, opposite, or whorled. Plants that have only one leaf per node have leaves that are said to be either alternate or spiral. Alternate leaves alternate on each side of the stem in a flat plane, and spiral leaves are arranged in a spiral along the stem.
How do you describe the texture of a leaf?
Leaf Size, Shape, Texture
Texture usually refers to the overall size of the leaves so textural sizes are relative to one another. Grasses have narrow, fine textured leaves. Salvias have medium textured leaves. Large Hosta leaves are considered coarse textured.
What are the edges of leaves called?
The edge of the leaf is called the margin. Figure 30.8. 1: Parts of a leaf: A leaf may seem simple in appearance, but it is a highly-efficient structure. Petioles, stipules, veins, and a midrib are all essential structures of a leaf.
Why do plants look different in shape?
Assertion: The same plant can have different shapes of leaves. Reason: Plants follow different pathways in response to the environment or phases of life to form different kinds of structures.
How do you identify different types of leaves?
The most obvious aspect to examine is the shape of the leaf. If it is an uninterrupted shape, it is simple. If the shape divides into smaller leaf sets the leaf is compound. Identifying plant leaves that are compound divides them into subsets.
Which are the two main types of leaves?
There are two basic types of leaves: simple and compound. Simple leaves are one single lamina attached to the stem by a petiole; while a compound leaf has a lamina that is divided into smaller leaves called leaflets; there are many versions of these types of leaves depending upon the arrangement and leaflet formation.
What are the 7 parts of a leaf?
Apex: tip of the leaf • Margin: edge of the leaf • Veins: carry food/water throughout leaf; act as a structure support • Midrib: thick, large single vein along the midline of the leaf • Base: bottom of the leaf • Petiole: the stalk that joins a leaf to the stem; leafstalk • Stipule: the small, leaf-like appendage to a …
What is the shape of a banana leaf?
Banana leaves are large, wide, elongated, and slightly rounded, averaging two meters in length, a half a meter in width, and 8-12 leaves per tree. The surface of the leaves are waxy, flexible, and glossy, and range in color from lime, olive green, to dark green.