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

Social Determinants of Health, Normal 0 false false false ...

Normal 0 false false false EN-IN X-NONE X-NONE MicrosoftInternetExplorer4

Enzymes, The Biological Catalysis Enzyme: Biological catalysis  are cal...

The Biological Catalysis Enzyme: Biological catalysis  are called enzyme. An enzyme can be defined as an organic  substance that tremendously accelerates a chemical  reaction w

Zoogly, are protozoans primitive to life .

are protozoans primitive to life .

What is the coelom, What is the coelom? To which structures do coeloms give...

What is the coelom? To which structures do coeloms give birth? Are all animals coelomate? Coeloms are cavities delimited by mesoderm. Coeloms create the cavities where the inte

Explain the anatomic variability of long buccal nerve, Anatomic variability...

Anatomic variability of long buccal nerve demands caution during surgery. Discuss Long buccal nerve, a branch of the mandibular division of trigeminal nerve emerges deep to the

Illustrates the effect of wall movement on earth pressure, Illustrates abou...

Illustrates about the effect of wall movement on earth pressure? Effect of wall movement on earth pressure About fifty years ago Terzaghi conducted a series of tests on larg

Differentiate blood retinal barrier and aqueous barrier, What are the diffe...

What are the differences between blood retinal barrier and blood aqueous barrier? Blood Retinal Barrier: Blood retinal barrier is present in retina. In retina there are t

Main moral problem about the cloning of human individuals, What is the main...

What is the main moral problem about the cloning of human individuals? As well biological perils, a very serious moral problem involves the nucleus transplantation technology c

How can amine groups be classified, How can amine groups be classified? ...

How can amine groups be classified? Amines can be classify into primary amines, those to which one -R (variable radical) is attached to a -NH2, secondary amines, those where on

Determine the eukaryotic replication origins, Which of the following statem...

Which of the following statements is wrong regarding eukaryotic replication origins? A. More origins are licensed and initiated within embryonic cells than in adult cells. B

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