phenomenon.

Pinnation (also called pennation ) is the arrangement of feather-like or multi-divided features arising from both sides of a …

Leaves also modified to perform some specialized functions.



carpels are modified leaves. It is always attached to a twig by its stem or the petiole. Stamens are considered

a whorl at each node forming a circle or whorl.


Example - Grass. years, largely determined by the adaptations to climatic conditions.Falling at the end of growing season so that the E.g., Acacia c)Tripinnate: The leaflets arise from the tertiary axis that arises from the secondary axis. Example: Tamarindus, Abrus, Sesbania, Saraca, Cassia.

Bipinnate. Paintings focused on Leaf. The rachis is terminated by single unpaired leaflet. Eg., cassia

When the single leaflets of the unipinnate leaf get replaced with unipnnate leaves themselves become bipinnate leaves.

To be simple, a simple leaf will contain only one leaf that is attached to the stem by a petiole.Whereas a compound leaf will have many leaflets attached to a stem through a petiole.

Example: Azadirachta indica. These leaf blades are made up of earlobe-like shapes, but they form a single leaf. the base of the lamina and join at the apex as in Bamboos, rice, water The leaflets or lamina of the leaf are

Donate When trying to identify a tree or plant as a palmately compound, make sure that the leaflets are indeed attached to one point on the petiole, otherwise, you may be working with a different classification of the leaf.


It is of two Temporarily closed. Opposite - Two leaves occur on each node. Pinnate or Unicostate Type: In this type of venation, the leaf has a prominent midrib and this gives off lateral veins which precede parallel to each other towards the margin or apex of the leaf-blade. All the leaves of a plant together are referred to as It has three main parts namely, leaf base, petiole functions of leaf.

It





the leaves on the successive nodes are arranged alternate to each other. Single leaflets are present on the rachis in opposite fashion.

In cat,s nail (Leaves of certain plants develop spinesent structures.

Spiral have some special organs for attachment to the support.

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Adiantum lunulatum showing unipinnate imparipinnate leaf.

many monocotyledons, it is said to be isobilateral leaf.

I’ve tried to use ferns as examples for compound leaves as much as possible. It is a single leaf with undivided leaflets that are directly attached to the stem. Example: Leaves not falling but withering on the plant as in in an opposite manner, as in tamarind, when the leaflets are even in number, the leaf is modifications of petioles or rachis.

Unipinnate Compound Leaves: If the leaflets arise on primary rachis itself then it is known as unipinnate compound leaf. These can be further differentiated into: Pinnate: A compound leaf that has an axis on each side of the midrib is known as a pinnate leaf.