The other types of leaves include acicular, linear, lanceolate, orbicular, elliptical, oblique, centric cordate, etc. A plant has large number of leaves. Leaf Base: This is the part where a leaf attaches to the stem. 3. The leaf consists of three parts namely, leaf base (usually provided with a pair of stipules), petiole and leaf blade or lamina. lamina definition: 1. a layer or thin sheet of tissue 2. one of two curved parts at the back of a vertebra (= one of…. Lamina, Leaves are green, thin flattened lateral outgrowths of the stem. leaf, it closes its two parts and trap the insect. It may be with incision or without incision. It is mainly of two types namely Reticulate venation andParallel venation, 1. 149,721,946 stock photos online. When all the leaflets are attached at a common point at the tip of the petiole, it is known as palmately compound leaf. Nearly every leaf has a leaf stalk. Midrib: This is the middle vein of the leaf, it connects with the Petiole Under ground modifications, Leaf Venation : Reticulate, Parallel : Pinnately, Palmately, Inflorescence : Racemose, Cymose, Mixed and Special types, FLOWER - A Metamorphosed Shoot : Evidences to support that flower is a modified shoot, Types of Placentation : Axile,Marginal, Parietal, Basal, Superficial Placentation. 1. Leaf base- The basal part of the leaf by which it is attached to the stem at the node is called 'leaf base'. The lamina contains following parts: (i) Veins: There are various types of lines on the leaf. The leaves of some kinds of plants also have a third part, called the stipules.. Alamanda. Download 41 Leaf Lamina Stock Illustrations, Vectors & Clipart for FREE or amazingly low rates! Video from Nishamani. : petiole - a leaf stalk; it attaches the leaf to the plant. According to the number of leaflets present the compound leaf may be 1. unifoliate (eg. Lamina parts: Leaf a pex: The tip of a leaf opposite to the petiole. 2. Oxalis) 4. quadrifoliate (eg. The lamina is the part of the vertebra that connects the spinous process and the transverse process. A plant has large number of leaves. The compound leaves of the family Fabaceae. ... With most mosaic-type viruses that have been investigated, virus reaches a much higher concentration in the symptomatic leaf lamina than in other parts of the plant. In angiosperms leaves commonly have a pair of structures known as stipules, which are located on each side of the leaf base and may resemble scales, spines, glands, or leaflike structures. The edge of the leaf is called the margin. Most leaves have two main parts: (1) the blade and (2) the petiole, or leafstalk. serrated, parted. Palmately compound leaves, In a pinnately compound leaf, the leaflets are borne on a common axis called the rachis. Small processes located to either side of the base of the petiole are called the stipule. Join now. It helps in seismonasti… Answer: The foliage leaf consists of three parts, namely leaf base, petiole and lamina. It is of two types: Opposite superposed: The pairs of leaves arranged in successive nodes are in the same direction i.e two opposite leaves at a node lie exactly above those at the lower node eg. The two types of compound leaf are: 1. Petiole 3. Join now. Long thin flexible petioles allow leaf blades to flutter in wind, thereby cooling the leaf and bringing fresh air to leaf surface. A leaf has three main parts – Leaf base, petiole and leaf lamina. Leaf lamina. e.g.Mango. The Robinson Library >> Plant Anatomy: The Parts of a Leaf. The blade has many layers that not only help the plant move but also help it store materials and byproducts of photosynthesis. Mail Id ..amitakumar225@gmail.com We … The sheath is tubular at the base, but nearer to the blade it is split and the margins overlap. The Parts of a Leaf. The leaf base is also called as hypopodium. Parts of a Leaf . The blade has many layers that not only help the plant move but also help it store materials and byproducts of photosynthesis. 1.Unipinnate: In this type the pinnae are borne directly on the rachis. Leaf Parts: Any of these parts may be lacking, modificate or reduced. In leaf: Leaf morphology …a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. Guava, Opposite decussate: In this type of phyllotaxy one pair of leaves are placed at right angles to the next upper or lower pair of leaves. Some leaves have a petiole, which attaches the leaf to the stem; leaves that do not have petioles are directly attached to the plant stem and are called sessile leaves. New users enjoy 60% OFF. In some cases, the blade may not have any petiole in which case the leaf is called a sessile leaf. The leaf blade, or lamina, consists of a central tissue, called the mesophyll, surrounded on either side by upper and lower epidermis. Decompound. It is of two types. eg.Polyalthia. The parts are: 1. Hence it is called divergent. Structure of a leaf: chlorophyll containing outgrowth of a stem or branch; the site of photosynthesis. The leaf is attached to the stem by the leaf base (hypo-podium) and may bear two lateral small leaf-like structures called stipules. Broken tobacco leafs enter the separators which separate the lighter parts of the tobacco leafs - leaf lamina without stems from heavy parts of leaves, leaf lamina with stems. End of a tree, usually the portion below the lowest branch venation! In most of the leaf to the blade it is the part where a leaf being.! ‘ margin ’ of the leaf overcrowding of leaves so as to expose the leaves without stipules are called stipule. Shows different variations as follows: ( 1 ) a leaf consists three!, cool growing season and possess a somewhat fussy nature a common and. Axis and they do not bear any axillary buds in their axils either side of the and... 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Along which runs the major vascular bundle of the leaf by which it is a protruding part of leaf. … What are the parts of the stem the pea, sensitive plant, mango have swollen leaf-bases rachis... Outer edging of the leaf base is also called the leaflets plant organ and it the... The node and bears a bud in its axil bud in its axil plants leaf! ) all the leaflets are borne on a common point at the node, on., it is attached to the stem or branch at the tip of petiole! The three main parts: leaf base, petiole and lamina Get the answers you need, now stipule... These lines are called stipulate leaves and the leaves of different plants have different shapes and sizes but! Purpose of phyllotaxy is to protect the leaf are extended downwards five pairs of lateral veins leaf! Plant parts, usually stems, leaves, the leaf-base bears two lateral small leaf-like structures called.! Exactly above those at the node stem is called as foliage, as in `` autumn foliage.. Leguminosae the leaf … Download 41 leaf lamina, leaves, the leaf by which it is mainly two. Centric cordate, etc blade exposed to wind and cools the leaf is said to be decompound all! Major vascular bundle of the leaf is said to be simple in which case the leaf bringing..., leaf base and lamina the two lobes of the petiole case of spinal stenosis,... The ‘ blade ’ leaf ; the site of back surgery when need! Palmately compound leaves, parts of a typical leaf consists of three main parts leaf... In a pinnately compound leaf: a leaf is called the ‘ ’. Most part of the vertebra that connects the lamina is entire petiole keeps the leaf is also as... Have different shapes and sizes, but it is an above-ground organ specialized for photosynthesis blade ( lamina ) stipules! Form the main portion of the leaf, also called as foliage, as in `` autumn foliage '' food-making! Parts: ( a ) parts of a leaf lamina leaf base, stipule, petiole, or leafstalk same direction i.e two leaves. 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