What are pinnate veins in a leaf?

What are pinnate veins in a leaf?

Definition. A type of venation pattern in which the secondary veins run parallel to each other from the midrib toward the margin.

What is a pinnate leaf arrangement?

PINNATELY-COMPOUND: divided into leaflets that are arranged along a stalk-like extension of the petiole like a feather. BIPINNATELY-COMPOUND: twice compound, with leaflets attached to second-order rachises (Rachis is a main axis of a compound structure).

What is pinnate and bipinnate?

Pinnately-compound leaves have their leaflets arranged along the middle vein. Bipinnately-compound (double-compound) leaves have their leaflets arranged along a secondary vein, which is one of several veins branching off the middle vein.

What is the function of the pinnate venation?

Pinnate or Unicostate Reticulate Venation: It gives rise to lateral veins along its entire length. Veins bear veinlets. The veinlets form reticulations. e.g. Mano, Peepal.

What is pinnate and palmate?

Pinnate (even): Leaflets are attached along an extension of the petiole called a rachis; there is an even number of leaflets. Palmate: Leaflets are attached to the tip of the petiole.

What does palmate and pinnate mean?

Pinnate refers to a condition of compound leaves with twig-connected petioles of varying lengths and rows of smaller sub-leaves above the axil while palmate refers to a condition of compound leaves, having leaflets form and radiate from a single point of attachment called the distal end of the petiole or rachis.

What is the pattern of veins in leaves called?

The arrangement of the pattern of veins in a leaf is called venation. Phyllotaxy is the arrangement of leaves on a stem.

What does pinnate leaves look like?

Pinnately lobed leaves have the lobes arranged on either side of a central axis like a feather. Palmately lobed leaves have the lobes spreading radially from a point, like fingers on a hand. Leaves that are deeply or repeatedly cut into many partitions, but not into individual leaflets.

What does pinnate mean in biology?

adjective Biology. (of a leaf) having leaflets or primary divisions arranged on each side of a common stalk: the pinnate leaves of a palm tree.

What is an example of a pinnate leaf?

Trees having a leaf that is pinnately compound will have leaflets growing from several places along the stalk or rachis—there can be as many as 21 leaflets and as few as three. Hickory, ash, walnut, pecan and black locust are all pinnate-leafed trees that can be found in North America.

What is the other name of pinnate venation?

Pinnate venation is also known as unicostate venation. In this type, the lamina has a single principal vein or midrib. It produces lateral veins.

What are palmate veins?

Palmate is a venation pattern in which several main veins radiate outward from the base of the leaf. This pattern is similar to five fingers that spread out from the palm of our hand. Main veins are approximately equal in size. And they diverge from a common point where leaf blade and petiole unite.

What is a pinnate vein?

Pinnate is one of several different types of vein patterns on leaves that occur naturally. Pinnate venation may sometimes be referred to as “feather” venation.

What is the difference between pinnate and palmate venation?

Pinnate and palmate are two venation patterns. In pinnate venation, one single main vein extends from the base to the top of the leaf and secondary veins branching off along the main vein. In palmate venation, there are several main veins arising from a common point where leaf blade and petiole unite.

What does pinnate mean in botany?

(botany) Having two rows of branches, lobes, leaflets, or veins arranged on each side of a common axis. Mimosa is a tree with pinnate leaves. The trunk is unbranched, often much shortened, and bears a crown of feathery or pinnate fronds. (zoology) Having a winglike tuft of long feathers on each side of the neck.

What is the difference between secondary veins and pinnately compound leaves?

The secondary veins are branching off from the primary vein. Pinnately compound leaves have leaflets arising from along both sides of the rachis. Furthermore, there are two types of pinnately compound leaves namely odd-pinnate and even-pinnate.

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