What is the margin of a leaf?
The margin is the perimeter of the leaf between the apex and base. The midrib is the prominent vein that subdivides the leaf into two halves from base to apex. Leaf Margins. The margin is the edge of the leaf lamina lying between the apex and base. Entire margins are smooth, without indentations or incisions.
How do you find the leaf margin?
Leaf Edges or Margins
- Entire Leaf: The margin is even and smooth around the entire leaf edge.
- Toothed or Serrated Leaf: The margin has a series of toothlike pointed teeth around the entire leaf edge.
- Lobed Leaf: The margin has an indention or indentions that go less than halfway to the leaf midrib or midline.
When the leaf margin is smooth?
Entire: the leaf margins are not toothed or divided in any way (smooth). Wavy: the leaf margins are not divided but curve up and down (undulate). Crenulate: the leaf margins are cut into small rounded teeth. Toothed: the leaf margins are divided into sharply pointed segments (serrate).
Are the leaf margins not entire?
The leaf margins are entire and the primary veins arch up from the point where the petiole attaches to the blade and converge at the apex of the leaf blade.
Which leaves have uneven margins?
American Elm Characteristics: Broad and flat, alternate, simple leaves that do not have lobes or margins. The leaf margin is toothed. The leaf has more teeth than veins. The leaf is double toothed with deeper notches regularly spaced.
What are the types of leaf margin?
Leaf margins
- Leaf margins: main part of the leaf, usually large and flat.
- Undulate: having a wavy margin.
- Sinuate: with a sinous margin.
- Serrate: having a sharp edge.
- Dentate: having a toothed margin.
- Lobate: lobed.
- Scalloped: with a scalloped margin.
- Palmate: like the fingers of a hand spread open.
What is crenate margin?
Each plant has crenate leaves. “Crenate” means they have rounded teeth along the margin. Looking closer at each leaf, we can see that the Golden ragwort leaves are more oval in shape (at least the larger, more mature leaves are) while the Ground ivy leaves are definitely round in overall shape.
What is the function of margin in leaf?
Hint: The leaf margin is the boundary area of the leaf that is extending along the edge of the leaf. There are many types of leaf margins that are important for plant identification. While leaves on a single tree may have different sizes, they will have the same general shape and margin.
What are the types of leaf margins?
Leaves are different shapes. This is because they have different margins. There are many types of margins including entire, dentate, serrate, sinuate, lobed and palmate.
What is entire leaf margin?
Entire margin. The entire margin leaf has no serrated edges, and is composed by one continuous, smooth surface around the whole edge of the leaf. This kind of leaf edge can come in several shapes such as linear (picture), deltoid, eliptical, ovate and more.
What is smooth leaf margin?
The leaf margin is the boundary area extending along the edge of the leaf. There are lots of different types of leaf margins that are important for plant identification. The basic types of margins are: Entire: having a smooth edge with neither teeth nor lobes.