What are flattened petioles?
structure in plants The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.
What are leaves that have no petioles?
Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. Leaves also have stipules, small green appendages usually found at the base of the petiole.
Why are the leaves of plants flat?
A leaf is often flat, so it absorbs the most light, and thin, so that the sunlight can get to the chloroplasts in the cells. Most leaves have stomata, which open and close. They regulate carbon dioxide, oxygen, and water vapour exchange with the atmosphere.
What is flattened part of leaf called?
Leaf blade
Lamina or Leaf blade- Is the green flat and broad part of the leaf.
Is leaf a stalk?
The stalk by which the leaves of most plants are attached to a stem. Also called petiole.
What is the leaf margin?
The leaf margins are entire and the primary veins arch up from the point where the petiole attaches to the blade and converge at the apex of the leaf blade. This kind of venation is callled acrodromous.
What are the two types of leaves?
What are the different types of leaves? There are two different types of leaves – simple and compound leaves. Simple leaves are lobed or divided but do not form distinct leaflets. Whereas, in a compound leaf the leaves are divided into distinct leaflets and each leaflet has a small petiole.
Why Most leaves are thin and flat?
The leaves are thin and flat so that they can be more exposed towards sunlight for absorption of light and carbon dioxide. This results in increased photosynthesis. The veins also provides larger surface area to distribute the pressure applied on leaves thereby helps in locating nutrients to tissues during an injury.
What are the 3 main functions of leaves?
The leaves perform three main functions such as manufacture of food, interchange of gases between the atmosphere and the plant body and evaporation of water.
Are the most attractive part of a plant?
The flower is the most prominent part of a plant. The open flower’s most attractive parts are the petals. The petals may vary in color depending on the flower. The small prominent leaf-like structures on the bud are known as sepals.
When the leaf is long narrow and flat it is called?
Flat (like most leaves) linear. linearis. entire leaf. Long and very narrow like a blade of grass.
What is another name for leaf stalk?
petiole
The petiole is a stalk that attaches a leaf to the plant stem.
What does the petiole of a plant look like?
In angiosperm: Leaves The petiole is a stalk that connects the blade with the leaf base. The blade is the major photosynthetic surface of the plant and appears green and flattened in a plane perpendicular to the stem.
Where does the petiole of a compound leaf end?
‘Compound leaves (that are petiolate) are still connected to the plant stem by a petiole. However, the petiole ends where the blades begin. Thereafter, moving out towards the tip of the leaf, the main axis of the leaf is called the rachis.
How are the blades of a petiolate leaf different?
In a petiolate leaf, the blade of the leaf has a petiole, also known as a leaf stalk. Simple leaves have only one main blade that originates from the bud. When a leaf has multiple blades originating from a single bud, it is called a compound leaf, and the individual blades within the single leaf are called leaflets.
Are there any leaves that have no petiole?
Many strap-shaped leaves essentially have no petiole and are described as sessile; broad, ovate, or triangular leaves commonly have a pronounced leaf stalk, called a…
