NEET UG » NEET UG Study Material » Biology » Types of leaves

Types of leaves

-In this article we will discuss the types of leaves, ( and briefly discussed their types) and the Characteristics of a Leaf And Venation, also we will discuss how to cook zobo leaves.

The leaf is a lateral appendage of the stem that is green, flat, thin, and extended. This portion grows from a node and has a bud in the axil. It grows from the leaf primordium of the shoot apex and is exogenous in origin. The photosynthetic pigment — chlorophyll – is responsible for the leaf’s green colour. This pigment aids in the synthesis of organic food by a variety of plants.

Foliage is a term you’ve probably heard before. Foliage refers to a plant’s green photosynthetic leaves. They are borne in acropetal succession on the stem. Now we’ll look at the numerous properties of leaves in the next part.

Types of Leaves

You’ve probably come across a variety of plants with leaves of varied shapes and sizes. They are divided into the following categories:

Acicular type: The acicular kind is needle-shaped.

Linear Type: They are linear in shape and are longer and wider than other leaves.

Lanceolate: They have a lance-like form.

Oblong Type: They are rectangular in shape and structure. Oblong Type: They are rectangular in shape and structure.

Reniform type: Reniform leaves are those that have the shape of kidneys.

Cordate type: They are heart-shaped and feature a deep notch at the base of the cordate kind.

Orbicular type: They are more or less round and are of the orbicular type.

 Saggitate type: They are fashioned like arrowheads and are of the agitate type.

Elliptical Shape: They have elliptical forms.

Hastate type: These leaves have a agitate form. The two basal lobes are outward-facing.

Ovate Structure: They have an oval or egg-shaped structure.

Lyrate Shape: They are shaped like a lyre.

Spatulate Type: They have spatula or spoon-like forms.

Centric Type: They are hollow and cylindrical.

Oblique Type: This leaf’s lamina is divided into two equal parts.

 Cuneate Type: They are wedge-shaped and of the cuneate kind.

This is all about the many varieties of leaves and their features. For a better understanding, we’ll look at a few solved examples.

Characteristics of a Leaf

  • The stem’s leaf is a lateral dissimilar extension.
  • A leaf is always produced at the stem’s node.
  • An axillary bud is always present in the axil of leaves.
  • It arises from the inflated leaf primordium of the developing apex and is exogenous.
  • Leaf growth is restricted.
  • There is no apical bud or a normal growth point on the leaves.
  • Leaf base, petiole, and leaf lamina are the three primary elements of a leaf. It may also have two stipules, which are lateral outgrowths of the leaf base.
  • The veins that go through the leaf lamina are noticeable vascular strands.

Venation

It’s the vein arrangement in the leaves, as well as the veinlets. Various forms of venation can be seen in different plants. Venation is often divided into two types:

Reticulate venation:-Veinlets are organised in a random pattern to form a complex network of veinlets in a reticulate venation. Dicotyledonous plants, like roses.

Parallel venation:-venation is positioned parallel to each other in this style of venation. For example, paddy is a monocotyledon.

Examples of leaves

  • Simple leaves are depicted in each of the photographs below. Because each leaf is linked to the stem by a petiole, these are considered simple leaves. Any partitions into individual leaflets are separated by a solid lamina in each leaf.
  • Pear tree, Guava Tree, and Oregano plant.

How to cook zobo leaves?

Zobo can be used to control blood pressure, lower cholesterol, strengthen blood vessels, soothe nerves, reduce stress, lose weight, and boost sex drive, among other things. However, it is not safe for pregnant women in their first trimester since it causes menstruation, which can lead to miscarriage.

Procedure

  • Assemble the washed zobo leaves in a pot with enough water to completely cover them.
  • Cook over medium heat for a few minutes, then remove from the fire.
  • Add the ginger and garlic, more water if necessary, and continue to simmer for at least 30 minutes. This is how long the zobo leaves will take to become entirely soft.
  • Remove the pan from the heat and set it aside to cool completely.
  • While your zobo cools, blend your pineapples.
  • After the zobo leaves have cooled, sift them out. The juice should then be strained through a chiffon cloth to remove any remaining particles, leaving only a smooth juice.
  • Add the pineapple juice to the mix. To make sure there are no particles remaining, filter it through the chiffon cloth once more.
  • At this point, you can add whatever artificial flavours you choose.
  • Refrigerate after putting into bottles.
  • Serve with sliced fruit and ice. It goes well with a snack or on its own.

Conclusion

 The leaf is a lateral appendage of the stem that is green, flat, thin, and extended. It grows from the leaf primordium of the shoot apex and is exogenous in origin. Cordate type: They are heart-shaped and feature a deep notch at the base of the cordate kind. Orbicular type: They are more or less round and are of the orbicular type. Saggitate type: They are fashioned like arrowheads and are of the agitate type. Cuneate Type: They are wedge-shaped and of the cuneate kind. The stem’s leaf is a lateral dissimilar extension. An axillary bud is always present in the axil of leaves. Leaf base, petiole, and leaf lamina are the three primary elements of a leaf. Because each leaf is linked to the stem by a petiole, these are considered simple leaves.

faq

Frequently asked questions

Get answers to the most common queries related to the NEET UG Examination Preparation.

Why do tree leaves have different shapes?

A tree’s leaf form is a response to the species’ long-term ecological and evolutionary histories. The limiting e...Read full

How long should I boil zobo leaves?

Assemble the washed zobo leaves in a pot with enough water to completely cover them. Cook over medium heat for a few...Read full

What are plant leaves?

In botany, a leaf is a flattened green protrusion from a vascular plant’s stem. Leaves create food for plants, whi...Read full

How many species of leaves are there?

Some scientists feel that this significantly undervalues some lesser-known living forms. In the 253 years since Linn...Read full