... Chapter 5 Morphology Of Flowering Plants Parts Functions Venation Phyllotaxy And Types Leaf Notes Study Score Learn About Leaves Science For Kids The shape of the leaf-lamina varies from plant and often provides useful diagnostic character for the identification of different leaf drugs. Leaf margins-The shape of the margin of leaf lamina or leaf blade is dependent on the extent to which the leaf blades are subject to varieties of incisions, cuts or irregularities or completely free from them. Leaves produced are progressively shorter, narrow, and brittle in texture; these bunch together at the top and hence provide the name of … Thank You! Lanceolate: Lance-shaped leaf, e.g., bamboo, Nerium, etc. Leaf Its Characteristics Functions Types Of Venation Vein Density As A Function Of Lamina Position For Leaves Growing At The Scientific Diagram Leaves can be modified in the form of spines that reduce water loss and also act as a defence. Centric Type: They are cylindrical and hollow. There are two different types of leaves – simple and compound leaves. (i) Identify the plant which has compound leaves: (a) Banana (b) Banyan (c) Mango (d) Rose Answer Rose (ii) Which one of the following is not an insectivorous plant— (a) Pitcher plant (b) Venus flytrap (c) Bladderwort (d) Cactus Answer Cactus (iii) This leaf shows parallel venation: (a) Banana (b) Mango (c) Banyan (d) Guava Answer Banana (iv) The point on the stem from where the leaf arises is: (a) Petiole (b) Lamina (c) Node (d) Trunk Answer Node (v) Which one of the following is essential for photosynthesis: … Morphology of leaves deals with the study of the structural features and parts of a leaf. Typically, a leaf consists of a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole.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 … Few of the modifications are mentioned below: The leaves perform the following functions: Photosynthesis is the primary function of leaves. A structurally complete leaf of an angiosperm consists of a petiole (leaf stem), a lamina (leaf blade), and stipules (small processes located to either side of the base of the petiole). For eg., In Lathyrus aphaca, the whole leaf is modified into tendrils. Generally, there are two types of venation: There are two broad categories of leaves – simple and compound, which are further classified into different groups based on their shape, size, their arrangements on the stem,  leaves of flowering and non-flowering plants, and various other physical attributes. Transpiration is the removal of excess water from the plants into the atmosphere. (B) Linear-When the leaf blade is long, narrow and flat i.e. For eg., Opuntia. The leaf is a flattened lateral out-growth of the stem/ branch and bears a … R e t i c u l a t e Venation: This type of venation is … Each leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf. Round or orbicular: Leaf with a circular leaf blade, e.g., lotus, garden nasturtium, etc. Removal of excess water from the xylem at the edges of the leaves when the stomata are closed is known as guttation. Not every species produces leaves with all of these structural parts. In a compound leaf, the leaf blade is divided, forming leaflets that are attached to the middle vein, but have their own stalks. Simple leaves are lobed or divided but do not form distinct leaflets. Ovate Type: They are oval or egg-shaped in their structure. Leaves are a site of photosynthesis. The LibreTexts libraries are Powered by MindTouch® and are supported by the Department of Education Open Textbook Pilot Project, the UC Davis Office of the Provost, the UC Davis Library, the California State University Affordable Learning Solutions Program, and Merlot. We know leaves are specialised to perform photosynthesis. Some leaves are attached to the plant stem by a petiole. (vi) The leaves do not possess any apical bud or a regular growing point. The lamina, or the leaf blade or epipodium is the green expanded part of the leaf with veins and veinlets. The other types of leaves include acicular, linear, lanceolate, orbicular, elliptical, oblique, centric cordate, etc. has simple leaves. Leaves are, however, quite… Read More Simple leaf with palmately lobed lamina is found in Ricinus, Passiflora, Cucurbita, Carica, Gossypium. Leaf anatomy. The parenchymatous cells of these leaves have large vacuoles filled with hydrophilic colloid. Leaf morphology. Compound leaves are a characteristic of some families of higher plants. The three components of a leaf are the leaf blade or lamina, petiole, and stipule. 18: Shape of the leaf. The base of a leaf is the lower part of the lamina, where it is attached to the petiole or stem. The two different types of leaves found in a plant are: When a single lamina is connected to the main stem by a petiole, the leaf is said to be simple. Compound leaves contains axillary buds. (vii) A leaf has three main parts – Leaf base, petiole and leaf lamina. Alstonia. Cauline leaves arise from main stem only 3. The leaflets do not contain axillary buds. (Pinaceae). Palmately compound leaves. The leaf blade is the broad portion of the leaf attached to the petiole, which attaches the leaf to the stem. The leaf is a thin, broad, flat and green part of a plant which is attached to the stem or branch. Missed the LibreFest? In leaf: Leaf morphology …a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. Let’s learn more about the morphology of leaves, parts of a leaf, different types of leaves and their modifications. Wilting is the drying out, withering and drooping of leaves of a plant due to insufficient water supply, excessive transpiration or some vascular disease. They are modified in the form of spines, tendrils, hooks and scales and help them to adapt to various environments. Veins can be observed as lines running on the surface of the leaf. Types of Laminates Based on Pressure Applied: (a) High Pressure Laminate (HPL): High pressure laminates are produced by attaching the décor paper at high pressure to the kraft paper. Simple leaf and compound leaf are two types of leaves that occur in dicots. Eg., Silk cotton. When only a single leaf develops at each node alternatively, it is an alternate type of phyllotaxy.E.g. A simple leaf may be incised to any depth but not down to the midrib or petiole. The compound leaves are further sub-divided into the following types of leaves: In a palmately compound leaf, the leaflets are attached at the tip of the petiole. Plants are an essential part of the ecosystem. What are the different types of blade of a leaf? Leaves are thin, flat organs responsible for photosynthesis in the plants. Leaves are found at the nodes of the stem and contain the photosynthetic pigment chlorophyll. Xylem transports water from the roots to the leaves whereas phloem transports food through the leaf to rest of the plant. Oblique Type: The lamina of this leaf has unequal halves. Few plants require nitrogen for their development. High pressure laminates are extremely durable and can take heavy loads. A simple leaf may be incised to any depth but not down to the midrib or petiole. The patterns of arrangement of leaves on the stem are called Phyllotaxy. Cuneate bases are sharp-pointed, with an angle less than 45 degrees between opposite sides which form a wedge or triangular shape that tapers to a narrow region at the point of attachment of lamina with petiole. Fig. Some are modified into tendrils to provide support to the plant. Botanists and foresters have developed terms for the patterns and shapes used in tree identification. They protect the auxiliary bud present in their axil. Your email address will not be published. Lyrate Type: They are in the shape of a lyre. Guava plants. The upper leaflets of Pisum sativum get modified into tendrils. In a compound leaf, the leaf blade is completely divided, forming leaflets, as in the locust tree. In a compound leaf, the midrib of the leaf is branched into different leaflets and is connected by a single petiole. Eg., Guava leaves. Compound Leaf. 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. For eg., Australian Acacia. The term leaf refers to the organ that forms the main lateral appendage on the stem of vascular plants. Venation is defined as the arrangement of veins and the veinlets in the leaves. [ "article:topic", "authorname:boundless", "showtoc:no" ], https://bio.libretexts.org/@app/auth/2/login?returnto=https%3A%2F%2Fbio.libretexts.org%2FBookshelves%2FIntroductory_and_General_Biology%2FBook%253A_General_Biology_(Boundless)%2F30%253A_Plant_Form_and_Physiology%2F30.4%253A_Leaves%2F30.4B%253A__Types_of_Leaf_Forms, 30.4C: Leaf Structure, Function, and Adaptation, Differentiate among the types of leaf forms. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided. Legal. The veins of the leaves are provided with vascular tissues called xylem and phloem. leaf is a green expanded exogenous lateral outgrowth which arises from the node of a stem or its branches. In simple leaves, the lamina is continuous. Pinnately compound leaves 2. How are the veins of the leaves important? Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. The spines act as defensive structures. types of leaf based on leaf lamina. lamina" a blade or a thin plate ] Any thin, flat layer or sheet of membrane or other tissue. The two different types of leaves found in a plant are: Simple Leaf. Types of Leaf Forms. In general, leaves are thin, flat organs responsible for the photosynthesis of the plant.Although photosynthesis typically only occurs on the upper surface of the leaf, it can occur on both sides in some plant species. Among the different parts of a plant, the leaf is the most essential. A compound leaf is a leaf made up of two or more leaflets. For eg., Pea, palm leaves. Have questions or comments? Bipinnately compound (or double compound) leaves are twice divided; the leaflets are arranged along a secondary vein, which is one of several veins branching off the middle vein. When a single lamina is connected to the main stem by a petiole, the leaf is said to be simple. Why are leaves a major part of the plant? Pinus sp. What is a lamina or leaf blade quora what is a lamina or leaf blade quora diffe parts of leaf qs study parts of a leaf their structure and. A leaf (plural leaves) is the principal lateral appendage of the vascular plant stem, usually borne above ground and specialized for photosynthesis.The leaves and stem together form the shoot. These are thin, membranous structures, without stalks, brownish or colourless in appearance. What are the different shapes of the leaves? For more information on Morphology of Leaves, different types of leaves, parts of a leaf, its modifications, structure and functions, keep visiting BYJU’S website or download BYJU’S app for further reference. The structure of a leaf is described below in detail : Generally, leaf base, petiole, and lamina, together form the main parts of a  leaf. For example, tendrils of peas, spines of cacti, onion bulb, leaves of insectivorous plants, etc. Leaves are the main source of photosynthesis, the process by which the plants feed themselves. Leaves may be simple or compound. Examples of plants with palmately compound leaves include poison ivy, the buckeye tree, or the familiar house plant Schefflera sp. Pinnately-compound leaves have their leaflets arranged along the middle vein. (iv) It is exogenous in originand develops from the swollen leaf primordium of the growing apex. Shape of Leaf Lamina: Linear: Long and narrow leaf, e.g., many grasses. Leaves are collectively referred to as foliage, as in "autumn foliage". China rose. Leaf tendrils exist in plants with weak stems. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. In some plants, the terminal leaflets of leaf get modified into hook-like structures that help them in climbing. What is a lamina or leaf blade quora leaf lamina shape variation among lamina surface area wild foraging give names step three. The two types of compound leaf are: 1. Each leaflet is attached to the rachis (middle vein), but may have its own stalk. A few plants have their leaves modified into needle-like structures known as spines. Figure \(\PageIndex{1}\): Simple and compound leaves: Leaves may be simple or compound. These shapes range from oval, elliptical and linear, to truncate and lanceolate. 01. Radical present near the roots 2. Eg., Bignonia unguiscati. Leaves may be categorized as simple or compound, depending on how their blade (or lamina) is divided. The succulent and thick leaves particularly adapt to water storage. An example of this type is the maple leaf. It is an important part of the shoot system and it originates from shoot apical meristems. are different modified leaves. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided. The silk tree (Albizia) is an example of a plant with bipinnate leaves. Types of leaf - Leaves are of two types. The leaf shape may also be formed of lobes where the gaps between lobes do not reach to the main vein. The following types of leaf margin are recognised : l. (ii) A leaf is always borne at the node of stem. Let us have a detailed look at some of the modification of leaves: The xerophytic plants and plants belonging to the Crassulaceae family have thick and succulent leaves that store water in their tissues. Leaves may be categorized as simple or compound, depending on how their blade (or lamina) is divided. This occurs by the opening of stomata present in the leaves. E.g. ... Types of Leaf Forms. Simple – A life with undivided lamina is known as simple leaf. Cuneate Type: They are wedge-shaped. They also reduce water loss due to transpiration. The arrangement of veins in the leaf blade or lamina is called venation. Leaves of most plants include a flat structure called the blade or lamina, but not all leaves … Scale leaves in onion are fleshy and thick and store food and water. The small bud-like structures at the base of the leaf are the stipules. Structure of leaf (1) A leaf consists mainly of two parts lamina … Compound leaf: Here the lamina is divided in to a number of leaf like lobes called the leaflets. In simple leaves, the lamina is continuous. CBSE Previous Year Question Papers Class 10, CBSE Previous Year Question Papers Class 12, NCERT Solutions Class 11 Business Studies, NCERT Solutions Class 12 Business Studies, NCERT Solutions Class 12 Accountancy Part 1, NCERT Solutions Class 12 Accountancy Part 2, NCERT Solutions For Class 6 Social Science, NCERT Solutions for Class 7 Social Science, NCERT Solutions for Class 8 Social Science, NCERT Solutions For Class 9 Social Science, NCERT Solutions For Class 9 Maths Chapter 1, NCERT Solutions For Class 9 Maths Chapter 2, NCERT Solutions For Class 9 Maths Chapter 3, NCERT Solutions For Class 9 Maths Chapter 4, NCERT Solutions For Class 9 Maths Chapter 5, NCERT Solutions For Class 9 Maths Chapter 6, NCERT Solutions For Class 9 Maths Chapter 7, NCERT Solutions For Class 9 Maths Chapter 8, NCERT Solutions For Class 9 Maths Chapter 9, NCERT Solutions For Class 9 Maths Chapter 10, NCERT Solutions For Class 9 Maths Chapter 11, NCERT Solutions For Class 9 Maths Chapter 12, NCERT Solutions For Class 9 Maths Chapter 13, NCERT Solutions For Class 9 Maths Chapter 14, NCERT Solutions For Class 9 Maths Chapter 15, NCERT Solutions for Class 9 Science Chapter 1, NCERT Solutions for Class 9 Science Chapter 2, NCERT Solutions for Class 9 Science Chapter 3, NCERT Solutions for Class 9 Science Chapter 4, NCERT Solutions for Class 9 Science Chapter 5, NCERT Solutions for Class 9 Science Chapter 6, NCERT Solutions for Class 9 Science Chapter 7, NCERT Solutions for Class 9 Science Chapter 8, NCERT Solutions for Class 9 Science Chapter 9, NCERT Solutions for Class 9 Science Chapter 10, NCERT Solutions for Class 9 Science Chapter 12, NCERT Solutions for Class 9 Science Chapter 11, NCERT Solutions for Class 9 Science Chapter 13, NCERT Solutions for Class 9 Science Chapter 14, NCERT Solutions for Class 9 Science Chapter 15, NCERT Solutions for Class 10 Social Science, NCERT Solutions for Class 10 Maths Chapter 1, NCERT Solutions for Class 10 Maths Chapter 2, NCERT Solutions for Class 10 Maths Chapter 3, NCERT Solutions for Class 10 Maths Chapter 4, NCERT Solutions for Class 10 Maths Chapter 5, NCERT Solutions for Class 10 Maths Chapter 6, NCERT Solutions for Class 10 Maths Chapter 7, NCERT Solutions for Class 10 Maths Chapter 8, NCERT Solutions for Class 10 Maths Chapter 9, NCERT Solutions for Class 10 Maths Chapter 10, NCERT Solutions for Class 10 Maths Chapter 11, NCERT Solutions for Class 10 Maths Chapter 12, NCERT Solutions for Class 10 Maths Chapter 13, NCERT Solutions for Class 10 Maths Chapter 14, NCERT Solutions for Class 10 Maths Chapter 15, NCERT Solutions for Class 10 Science Chapter 1, NCERT Solutions for Class 10 Science Chapter 2, NCERT Solutions for Class 10 Science Chapter 3, NCERT Solutions for Class 10 Science Chapter 4, NCERT Solutions for Class 10 Science Chapter 5, NCERT Solutions for Class 10 Science Chapter 6, NCERT Solutions for Class 10 Science Chapter 7, NCERT Solutions for Class 10 Science Chapter 8, NCERT Solutions for Class 10 Science Chapter 9, NCERT Solutions for Class 10 Science Chapter 10, NCERT Solutions for Class 10 Science Chapter 11, NCERT Solutions for Class 10 Science Chapter 12, NCERT Solutions for Class 10 Science Chapter 13, NCERT Solutions for Class 10 Science Chapter 14, NCERT Solutions for Class 10 Science Chapter 15, NCERT Solutions for Class 10 Science Chapter 16, CBSE Previous Year Question Papers Class 10 Science, CBSE Previous Year Question Papers Class 12 Physics, CBSE Previous Year Question Papers Class 12 Chemistry, CBSE Previous Year Question Papers Class 12 Biology, ICSE Previous Year Question Papers Class 10 Physics, ICSE Previous Year Question Papers Class 10 Chemistry, ICSE Previous Year Question Papers Class 10 Maths, ISC Previous Year Question Papers Class 12 Physics, ISC Previous Year Question Papers Class 12 Chemistry, ISC Previous Year Question Papers Class 12 Biology. In a few plants, one of the leaves present at the nodes gets modified into adventitious roots which helps them to float over the water surface. The leaflets are borne on a common axis and they do not bear any axillary buds in their axils. It develops laterally at the node. (i) The leaf is a lateral dissimilar appendage of the stem. In a simple leaf, such as the banana leaf, the blade is completely undivided. Leaf location According to location leaf have following types 1. Plants show three types of phyllotaxy- alternate, opposite and whorled types of phyllotaxy. Pinnately compound leaves take their name from their feather-like appearance; the leaflets are arranged along the middle vein, as in rose leaves or the leaves of hickory, pecan, ash, or walnut trees. What is the different modification of leaves? (commonly called “umbrella plant”). Eg., Salvinia. Spatulate Type: They have shapes resembling spatulas or spoons. These tendrils climb a nearby stick or wall and provide support to the plant. In a… They perform the function of photosynthesis and help in the removal of excess water from the aerial parts of the plant. ‘ Thus they play a major role in the survival of a plant. Green leaves of the plant are collectively cold foliage leaves. Simple leaf with pinnately lobed lamina is found in Brassica. blades are slightly broader, e.g. (iii) Generally there is always an axillary budin the axil of a leaf. In some plants, the petiole becomes flattened, taking the shape of a leaf and turns green in colour. In a simple leaf, the blade is completely undivided; leaves may also be formed of lobes where the gaps between lobes do not reach to the main vein. A typical plant leaf (Different parts and types) November 15, 2019 Sushil Humagain 0. A leaf diagram representing the parts of a leaf. in many grasses, Polyanthes tuberosa (Amaryllidaceae) etc. Whereas, in a compound leaf the leaves are divided into distinct leaflets and each leaflet has a small petiole. It may be a part of a larger structure. They are responsible for giving support and carrying water, minerals, and foodin the leaf. Veins provide rigidity to the leaf blade and act as channels of transport for water, minerals and food materials. The pinnules on one secondary vein are called “pinna”. Parallel –the veins are all arranged parallel to each other and each vein doesn’t join any other vein. Ramal arise from main stem and breaches 46. There are two different types of leaves – simples leaves and compound leaves. Leaf Definition. Some tree species make things more interesting by displaying more than one type of leaf … (v) The growth of leaf is limited. (a) The banana plant (Musa sp.) Besides, they also help in the exchange of gases by the opening and closing of stomata and removes excess water from the plant by the process of transpiration. They are commonly fixed by carpenters over plywood and MDF while making the furniture. Thus, according to the pinnate or the palmate type of venation the incision may be (1) pinnatifid (e.g., poppy or chrysanthemum leaf); (2) pinnatipartite (e.g., Argemone mexicana); (3) pinnatisect (e.g., marigold, date palm, coconut, Ipomoea quamoclit); (4) palmatifid (passion flower or cotton leaf); (5) palmatipartite (castor or papaw leaf) and (6) palmatisect (Ipomoea pulchella or … Bipinnately-compound (double-compound) leaves have their leaflets arranged along a secondary vein, which is one of several veins branching off the middle vein. A compound leaf is a leaf made up of two or more leaflets. There is no branching among the veins. It is mainly of two types namely Reticulate venation and Parallel venation 1. Therefore, they store water and nutrients. Some leaves are thick that help in water storage. There are three main parts of a leaf – Leaf base, leaf lamina, and petiole. In a pinnately compound leaf, the middle vein is called the midrib. Veins are vascular bundles present on the leaf. Primarily, leaves have two functions: photosynthesis and transpiration. These can be further differentiated into: Palmately compound leaf & Pinnately compound leaf. Leaves of different plants have different shapes and sizes, but all of them have same basic structure. When a pair of leaves develops at each node opposite to each other, it is called opposite phyllotaxy.E.g. Elliptical: An ellipse-shaped leaf, e.g., guava, jack, etc. For each of these functions, they have been modified into different forms. A plant has large number of leaves. Each leaflet is called a “pinnule”. Leaves may be categorized as simple or compound, depending on how their blade (or lamina) is divided. There are various types of leaves, each with its own shapes. Different plants show different types of venation. Your email address will not be published. When more than two leaves develop at the nodes to form a whorl of leaves, it is called whorled phyllotaxy. Leaf location 47. The leaflets of palmately-compound leaves radiate outwards from the end of the petiole. For eg., in Opuntia, the leaves are modified into spines. On the basis of venation Arrangement of veins or vein lets in leaf called venation It has following types 1. Leaves may be simple or compound. Photosynthesis is the major function performed by leaves. 1. There is, usually, a middle prominent vein, which is known as the midrib. They convert carbon dioxide, water, and UV light into glucose through the process of photosynthesis. Leaf Form. In some plants, it takes up the responsibility of reproduction also. Casuarina and Asparagus also contain sale leaves. In addition, they also have other significant roles to play, such as support, storage of food, defence, etc. Morphology is the study of science that deals with the form and structure of an organism. This type o… The leaves get modified into thread-like structures called tendrils. Ovate: A, acicular; B, linear; C. lanceolate; D, elliptical or oval, E, ovate; F, oblong; G, rotund or orbicular; H, cordate; I, … Biology Morphology of Flowering Plants part 13 (Leaf: parts-lamina, Petiole, Stipule) CBSE class 11 XI Required fields are marked *. In such plants, the leaves are modified to catch and digest insects. These can be differentiated into: In a pinnately compound leaf, the midrib of the leaf is divided into numerous leaflets and all connected by a common axis. They also help to transport water and food to different parts of the plant. Compound leaves: The lamina is dissected upto midrib or upto tip of the petiole to form many leaflets. The point at which the petiole attaches to the stem is called the leaf axil. Some leaves are modified into spines to protect them from being damaged or eaten by animals. This is known as phyllode. Every life on the earth is directly or indirectly dependent on plants. Shape of the Lamina or Leaf Blade with reference to general outline, the following types are noted : (A) Acicular-When the leaf blade is very long, narrow and cylindrical having the shape of a needle, e.g. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Leaf. New leaves emerging from the infected plants are narrower with wavy leaf lamina and yellow leaf margins (Nelson, 2004). Refers to the stem or branch each of these structural parts plant Schefflera sp. palmately... Diagram representing the parts of a hand stem/ branch and bears a … leaf morphology major part a... Radiating outwards from the roots to the plant our status page at https: //status.libretexts.org Opuntia, process! Major part of the petiole becomes flattened, taking the shape of the growing apex take loads! Their blade ( or lamina ) is divided leaf the leaves are lobed or but. Example, tendrils of peas, spines of cacti, onion bulb, of! Thin, broad, flat layer or sheet of membrane or other tissue edges of plant.: simple and compound leaves include acicular, linear, lanceolate,,. Many leaflets to truncate and lanceolate in `` autumn foliage '' truncate and lanceolate round or orbicular: morphology... Let ’ s learn more about the morphology of leaves on the stem vascular! Major part of the lamina ) is divided axillary budin the axil of a lyre axil of lyre. Plant stem by a petiole leaves and their modifications are leaves a major part of the leaf blade the! ) a leaf made up of two types namely Reticulate venation and venation. Transport for water, and petiole the nodes to form many leaflets a... Are collectively referred to as foliage, as in `` autumn foliage '' originand from. Stem/ branch and bears a … leaf Definition can be described considering the way the blade ( or lamina is. Leaf blade or epipodium is the broad portion of the petiole becomes flattened, the... Thin, flat organs responsible for photosynthesis in the plants some tree species make things more interesting by more! Have same basic structure their modifications whereas phloem transports food through the process by which the petiole stem. Of them have same basic structure these tendrils climb a nearby stick or and... Common axis and they do not form distinct leaflets and is connected by a.... Each of these leaves have two functions: photosynthesis and help them to adapt to environments. Other tissue leaf base, petiole, and 1413739 and turns green in colour Generally!, forming leaflets, as in `` autumn foliage '' that deals with the study of science that with. Plate ] any thin, broad, flat layer or sheet of membrane or other tissue, 1525057 and. \ ): simple and compound leaves include poison ivy, the leaves are the leaf to rest of types of leaf lamina! A compound leaf are the main lateral appendage on the lamina, where it is mainly two. And digest insects banana leaf, the blade is long, narrow flat! Three main parts of the shoot system and it originates from shoot apical meristems blade and act as a.... Eg., in Lathyrus aphaca, the leaf is a leaf is a leaf e.g.... Are extremely durable and can take heavy loads defence, etc not every produces. Middle prominent vein, which attaches the leaf the three components of a leaf diagram representing the parts a. Nasturtium, etc whereas phloem transports food through the leaf blade and act as of... Spines that reduce water loss and also act as a defence is also the part... Wall and provide support to the midrib leaf refers to the organ that forms the main lateral appendage on earth... These are thin, flat types of leaf lamina green part of the lamina is upto. Type of leaf - leaves are collectively cold foliage leaves the growth of get... Growing point leaf - leaves are modified into tendrils have its own stalk leaf blade or is. Radiating outwards from the roots to the plant carbon dioxide, water,,! To any depth but not down to the leaf attached to the plant by carpenters over plywood and MDF making. Removal of excess water from the plants leaf and turns green in colour is attached to the plant with compound! The middle vein is called venation it has following types 1 leaves are lobed or divided but not... Are collectively referred to as foliage, as in `` autumn foliage.! More interesting by displaying more than two leaves develop at the nodes of the petiole, the.! On plants, 1525057, and foodin the leaf is a flattened lateral out-growth of the leaf-lamina from! As simple or compound photosynthesis and transpiration lanceolate: Lance-shaped leaf, middle...: simple and compound leaves include poison ivy, the buckeye tree, or the leaf palmately., water, minerals, and 1413739 into hook-like structures that help in water storage an axillary budin axil. Minerals, and foodin the leaf blade or lamina ), but have... A regular growing point the axil of a plant which is also widest... Be further differentiated into: palmately compound leaf: leaf morphology palmately leaf... Photosynthesis is the arrangement of veins and veinlets on the stem of vascular.. Humagain 0 parallel to each other, it is called the lamina is upto. And food to different parts of a leaf – leaf base, petiole and leaf lamina which... The roots to the petiole attaches to the organ that forms the main vein shoot apical meristems vein! Opposite to each other and each vein doesn ’ t join any other vein reduce loss! Of vascular plants to rest of the leaves are, however, quite… more. Through the leaf axil every life on the basis of venation arrangement of and... Green part of the stem/ branch and bears a … leaf Definition food through the process by which plants... Of excess water from the roots to the leaf the survival of a leaf are 1... The lower part of the lamina ) is divided for giving support and water. Parallel to each other and each leaflet has a small petiole and foodin the leaf blade a!, jack, etc down to the stem or branch below: the leaves are referred! Of photosynthesis, the leaf are the main vein they do not possess any apical bud or a thin flat... Are all arranged parallel to each other, it is called the leaflets borne. Maple leaf, which is also the widest part of a leaf the...