What is leaf morphology, Biology

Assignment Help:

What is Leaf Morphology?

49_Leaf Arrangement.png

Leaf Arrangement : These show the different types of leaf arrangement on a twig. The point on the twig at which the leaves are attached is referred to as a "node." Alternate leaf arrangement is when a single leaf is attached to the stem at a node, and the next adjacent leaf on the stem points in a different direction. If two leaves occur at the same node and are 180 degrees apart, it is called an opposite leaf arrangement. Three or more leaves attached at the same node forms a whorled leaf arrangement.

736_Compound Leaves.png

Compound Leaves : A single leaf on a petiole, or stalk, is called a simple leaf. In many cases, the leaf is divided into sub parts, or leaflets, and these are then called compound leaves. A leaf with its leaflets radiating from one point like the fingers from the palm of your hand is called a palmately compound leaf. If the leaflets are formed in a feather-like fashion, the leaf is called pinnately compound. If the feather-like leaflets themselves are divided into smaller feather like leaflets, the compound leaves are called doubly pinnate.

970_Leaf Margins.png

Leaf Margins : The edges of a leaf blade are referred to as leaf margins. Leaf margins can be highly variable, and come in 4 main types. An entire leaf margin is a margin that has a smooth and unbroken edge. A serrated margin is one that has teeth-like points, a lobed leaf has deep cut indentations, and an undulate leaf edge has gentle, wave like edges.

770_Leaf Shapes.png

Leaf Shapes : The shapes of leaf blades is also variable. A lanceolate leaf has the shape of a lance, or spear, blade. Oval and triangular leaf shapes are self-explanatory, and a cordate shaped leaf has the shape of a heart.

Leaf Venation : The veins that serve leaves form fairly typical arrangements, or patterns. Parallel venation is found in monocots, and reticulate, or netted patterns are found in dicots. Palmate leaf venation resembles a pattern formed by fingers radiating from the palm of your hand, and pinnately net venation resembles the pattern found in the pinna of feathers.


Related Discussions:- What is leaf morphology

Blood sampling , BLOOD SAMPLING : In blood sampling, the skin is deliberat...

BLOOD SAMPLING : In blood sampling, the skin is deliberately punctured in order to take a blood sample for analysis. If this is done carelessly, it is easy for microorganisms eith

Protozoan flagellates, discus the protozoan flagellates of less medical imp...

discus the protozoan flagellates of less medical importance ,outlining their development stages,normal habitants and morphological characteristics

Explain the process of nuclear reorganization, Process of nuclear reorganiz...

Process of nuclear reorganization in protozoa in which nucleus divides, each half undergoes a maturation, and two persisting functional nuclei reunite is termed as: a) Autogamy

Efficiently generate and amplify cdna, Your methods so far have given some ...

Your methods so far have given some success! You now want to look at many different tissues in several individuals, some of whom have the mutation, some who are controls. How can y

Which type of defense cell do viral infections, Q. Of which type of defense...

Q. Of which type of defense cell do viral infections stimulate the multiplication? The main leukocytes that generally participate and multiply in the defense against viral infe

Gastroesophageal reflux, Q. Show Gastroesophageal reflux? Obesity is th...

Q. Show Gastroesophageal reflux? Obesity is thought to be another potential predisposing factor to gastroesophageal reflux or GERD. Maintenance of ideal weight for age may help

Sex-influenced traits, what are the examples of sex-influenced traits in hu...

what are the examples of sex-influenced traits in human?

What is the explanation for the bleeding, What is the explanation for the b...

What is the explanation for the bleeding that accompanies menses? The hemorrhage that accompanies menses happens because the endometrium is a richly vascularized tissue. The r

Reproduction and life cycles – protozoan, Reproduction and Life Cycles – Pr...

Reproduction and Life Cycles – Protozoan Asexual reproduction occurs in all protozoan through fission, budding and cyst formation. In this method the organism reproduces to fo

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd