Why do leaves have tiny hairs
Hairs on plants growing in areas subject to frost keep the frost away from the living surface cells. In windy locations, hairs break up the flow of air across the plant surface, reducing transpiration. Dense coatings of hairs reflect sunlight, protecting the more delicate tissues underneath in hot, dry, open habitats.
What is called leaf apex
The green, flat and broad portion of the leaf is called lamina or leaf blade. The tip of the leaf blade is called leaf apex.
What is leaf pubescence
The presence of leaf pubescence (leaf hairs) in Encelia farinosa, a desert species of the Composite family, reduces the absorptance of photosynthetically active radiation (400 to 700 nanometers) by as much as 56 percent more than a closely related but nonpubescent species, E.
Why do plants have hairs
The plant world has lots of hair. Plants use hair for some of the same reasons animals do: to keep them warm, cool, or protected. Plants also use hair to collect food or distribute seeds. Insect-eating pitcher plants even have down-turned hairs to keep insects from escaping.Aug 13, 1996
What does glandular mean in botany
glandular, relating to glands, having the function or nature of a gland, made up of glands: glandularis,-e (adj.B).
What are waxy leaves
The waxy covering on plant leaves, young stems, and fruit is called the "cuticle". It is composed of cutin, a wax-like material produced by the plant that is chemically a hydroxy fatty acid. The purpose of this covering is to help the plant retain water.Oct 12, 2002
What is Cortex made of
The cerebral cortex is made up of gray matter (comprises cell bodies and dendrites) that covers the internal white matter. Cerebrum is made up of both gray and white matter and comprises both cell bodies and nerve fibers. The cerebrum is composed of two hemispheres.
How do hairy leaves conserve water
Hairy leaves – minimise water loss by reducing air flow and creating a humid microclimate which reduces evaporation rate and the water potential gradient. Curled leaves – minimises water loss within a microenvironment with no air flow creating a humid microclimate reducing evaporation rate and water potential gradient.
Where is the apex in leaves
The shape of the tip (apex) of the leaf. The description of leaf apex shape is generalised and subjective. Leaves on a plant can vary in shape and size and between individuals.
What is Apex in plants
In botany, apex refers to the highest point or vertex of a plant stem or root. The shoot apex is where fresh stems, leaves, and other parts of a plant grow after the old parts fall off or dry up. In some cases, such as monocot stems, the shoot apex tends to be more elongated.
What is the shape of leaf apex
The leaf or leaflet apex is blunt to rounded. Generally, converging margins are separated by an angle of more than 90 degrees.
What is leaf blade
Definitions of leaf blade. especially a leaf of grass or the broad portion of a leaf as distinct from the petiole. synonyms: blade. type of: foliage, leaf, leafage. the main organ of photosynthesis and transpiration in higher plants.
What is acute leaf apex
Definition. Sharp; usually referring to the apex of a flattened structure (such as a leaf) in which the two sides are straight and, when they meet, form an angle that is always less than 90°
What is the leaf base
The leaf base is the slightly expanded area where the leaf attaches to the stem. The paired stipules, when present, are located on each side of the leaf base and may resemble scales, spines, glands,… In angiosperm: Leaves.
What is leaf venation
Leaf venation is the term used to describe the arrangement of veins in a leaf lamina. Leaves are the most important vegetative structure.
What is Aristate leaf apex
Aristate leaf apex. ending in a stiff, bristle-like point. Cuspidate leaf apex. with a sharp, elongated, rigid tip, tipped with a cusp.
What is leaf Phyllotaxy
Phyllotaxy is the term used to describe the arrangement of leaves around the stem. The proper arrangement of leaves is important for providing sunlight and photosynthesis. Leaves arise from the node of the stem. They develop from the shoot apical meristems.
What is obtuse leaf apex
Obtuse Leaf Apex. A leaf apex whose sides form an angle greater than 90º, but not quite as smooth or wide as a rounded leaf apex. Cotinus obovatus has leaves that vary in shape but most have an obtuse to rounded apex.