types of leaf lamina

R e t i c u l a t e Venation: This type of venation is … Compound Leaf. Leaves of most plants include a flat structure called the blade or lamina, but not all leaves … Legal. Leaves are, however, quite… Read More Leaves are a site of photosynthesis. Leaves are found at the nodes of the stem and contain the photosynthetic pigment chlorophyll. Each leaflet is attached to the rachis (middle vein), but may have its own stalk. Morphology is the study of science that deals with the form and structure of an organism. Shape of Leaf Lamina: Linear: Long and narrow leaf, e.g., many grasses. Leaves of different plants have different shapes and sizes, but all of them have same basic structure. 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. The pinnules on one secondary vein are called “pinna”. Some leaves are modified into spines to protect them from being damaged or eaten by animals. Casuarina and Asparagus also contain sale leaves. (iii) Generally there is always an axillary budin the axil of a leaf. The spines act as defensive structures. Pinnately compound leaves 2. Guava plants. In some plants, the terminal leaflets of leaf get modified into hook-like structures that help them in climbing. The leaflets do not contain axillary buds. Cauline leaves arise from main stem only 3. A palmately compound leaf has its leaflets radiating outwards from the end of the petiole, like fingers off the palm of a hand. Some tree species make things more interesting by displaying more than one type of leaf … Whereas, in a compound leaf the leaves are divided into distinct leaflets and each leaflet has a small petiole. Required fields are marked *. Let’s learn more about the morphology of leaves, parts of a leaf, different types of leaves and their modifications. The leaves get modified into thread-like structures called tendrils. Your email address will not be published. Leaf anatomy. In a… The patterns of arrangement of leaves on the stem are called Phyllotaxy. The leaf is a flattened lateral out-growth of the stem/ branch and bears a … Spatulate Type: They have shapes resembling spatulas or spoons. Simple – A life with undivided lamina is known as simple leaf. 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. Leaf morphology. 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. The small bud-like structures at the base of the leaf are the stipules. In a compound leaf, the leaf blade is divided, forming leaflets that are attached to the middle vein, but have their own stalks. 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. For more information contact us at info@libretexts.org or check out our status page at https://status.libretexts.org. Cuneate Type: They are wedge-shaped. 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. Some leaves are thick that help in water storage. (iv) It is exogenous in originand develops from the swollen leaf primordium of the growing apex. In a compound leaf, the leaf blade is completely divided, forming leaflets, as in the locust tree. Eg., Bignonia unguiscati. 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 arrangement of veins in the leaf blade or lamina is called venation. 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. Eg., Guava leaves. Simple leaf and compound leaf are two types of leaves that occur in dicots. This type o… They convert carbon dioxide, water, and UV light into glucose through the process of photosynthesis. Wilting is the drying out, withering and drooping of leaves of a plant due to insufficient water supply, excessive transpiration or some vascular disease. In a pinnately compound leaf, the middle vein is called the midrib. A plant has large number of leaves. Each leaflet is called a “pinnule”. has simple leaves. There are two different types of leaves – simples leaves and compound leaves. It develops laterally at the node. Round or orbicular: Leaf with a circular leaf blade, e.g., lotus, garden nasturtium, etc. Among the different parts of a plant, the leaf is the most essential. (vii) A leaf has three main parts – Leaf base, petiole and leaf lamina. Venation is the arrangement of veins and veinlets on the lamina or surface of the leaf. In a simple leaf, such as the banana leaf, the blade is completely undivided. Eg., Neem. Simple leaves are lobed or divided but do not form distinct leaflets. The structure of a leaf is described below in detail : Generally, leaf base, petiole, and lamina, together form the main parts of a  leaf. In some plants, the petiole becomes flattened, taking the shape of a leaf and turns green in colour. They also help to transport water and food to different parts of the plant. Fig. A typical plant leaf (Different parts and types) November 15, 2019 Sushil Humagain 0. The three components of a leaf are the leaf blade or lamina, petiole, and stipule. When more than two leaves develop at the nodes to form a whorl of leaves, it is called whorled phyllotaxy. They are modified in the form of spines, tendrils, hooks and scales and help them to adapt to various environments. Pinnately compound leaves Radical present near the roots 2. Leaf location 47. A simple leaf may be incised to any depth but not down to the midrib or petiole. Leaves may be categorized as simple or compound, depending on how their blade (or lamina) is divided. Photosynthesis is the major function performed by leaves. Morphology of leaves deals with the study of the structural features and parts of a leaf. A leaf diagram representing the parts of a leaf. In leaf: Leaf morphology …a broad expanded blade (the lamina), attached to the plant stem by a stalklike petiole. Some leaves are attached to the plant stem by a petiole. For eg., Pea, palm leaves. In addition, they also have other significant roles to play, such as support, storage of food, defence, etc. Have questions or comments? Removal of excess water from the xylem at the edges of the leaves when the stomata are closed is known as guttation. Pinnately-compound leaves have their leaflets arranged along the middle vein. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided. blades are slightly broader, e.g. Oblique Type: The lamina of this leaf has unequal halves. The leaflets are borne on a common axis and they do not bear any axillary buds in their axils. New leaves emerging from the infected plants are narrower with wavy leaf lamina and yellow leaf margins (Nelson, 2004). A, acicular; B, linear; C. lanceolate; D, elliptical or oval, E, ovate; F, oblong; G, rotund or orbicular; H, cordate; I, … 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. Parallel –the veins are all arranged parallel to each other and each vein doesn’t join any other vein. The two different types of leaves found in a plant are: Simple Leaf. types of leaf based on leaf lamina. E.g. Leaves are the main source of photosynthesis, the process by which the plants feed themselves. We also acknowledge previous National Science Foundation support under grant numbers 1246120, 1525057, and 1413739. There are various types of leaves, each with its own shapes. Compound leaves are a characteristic of some families of higher plants. Leaf. Every life on the earth is directly or indirectly dependent on plants. Leaves are collectively referred to as foliage, as in "autumn foliage". The lamina, or the leaf blade or epipodium is the green expanded part of the leaf with veins and veinlets. 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. When a pair of leaves develops at each node opposite to each other, it is called opposite phyllotaxy.E.g. ‘ 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. Simple leaf with pinnately lobed lamina is found in Brassica. Each leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf. Leaves may be categorized as simple or compound, depending on how their blade (or lamina) is divided. 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. These are thin, membranous structures, without stalks, brownish or colourless in appearance. For eg., in Opuntia, the leaves are modified into spines. Plants are an essential part of the ecosystem. Some are modified into tendrils to provide support to the plant. Missed the LibreFest? ... Chapter 5 Morphology Of Flowering Plants Parts Functions Venation Phyllotaxy And Types Leaf Notes Study Score Learn About Leaves Science For Kids 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. Different plants show different types of venation. The two types of compound leaf are: 1. in many grasses, Polyanthes tuberosa (Amaryllidaceae) etc. China rose. The leaf shape may also be formed of lobes where the gaps between lobes do not reach to the main vein. An example of this type is the maple leaf. They convert carbon dioxide, water and sunlight into glucose and energy. [ "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. Leaf tendrils exist in plants with weak stems. Alstonia. 18: Shape of the leaf. Thank You! (Pinaceae). This is known as phyllode. Ovate: 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. Ramal arise from main stem and breaches 46. lamina" a blade or a thin plate ] Any thin, flat layer or sheet of membrane or other tissue. Veins are vascular bundles present on the leaf. Venation is defined as the arrangement of veins and the veinlets in the leaves. 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. Compound leaf: Here the lamina is divided in to a number of leaf like lobes called the leaflets. For eg., Australian Acacia. What is a lamina or leaf blade quora leaf lamina shape variation among lamina surface area wild foraging give names step three. In simple leaves, the lamina is continuous. The other types of leaves include acicular, linear, lanceolate, orbicular, elliptical, oblique, centric cordate, etc. In a compound leaf, the midrib of the leaf is branched into different leaflets and is connected by a single petiole. Few of the modifications are mentioned below: The leaves perform the following functions: Photosynthesis is the primary function of leaves. Thus they play a major role in the survival of a plant. Eg., Guava leaves. Leaves produced are progressively shorter, narrow, and brittle in texture; these bunch together at the top and hence provide the name of … A simple leaf may be incised to any depth but not down to the midrib or petiole. It may be a part of a larger structure. What is the different modification of leaves? In such plants, the leaves are modified to catch and digest insects. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided. The following types of leaf margin are recognised : l. The silk tree (Albizia) is an example of a plant with bipinnate leaves. Green leaves of the plant are collectively cold foliage leaves. Eg., Salvinia. (v) The growth of leaf is limited. Centric Type: They are cylindrical and hollow. Figure \(\PageIndex{1}\): Simple and compound leaves: Leaves may be simple or compound. There are two different types of leaves – simple and compound leaves. When only a single leaf develops at each node alternatively, it is an alternate type of phyllotaxy.E.g. 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. Xylem transports water from the roots to the leaves whereas phloem transports food through the leaf to rest of the plant. There are three main parts of a leaf – Leaf base, leaf lamina, and petiole. What are the different shapes of the leaves? Primarily, leaves have two functions: photosynthesis and transpiration. 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. These shapes range from oval, elliptical and linear, to truncate and lanceolate. Bipinnately-compound (double-compound) leaves have their leaflets arranged along a secondary vein, which is one of several veins branching off the middle vein. Leaf Definition. Leaves are thin, flat organs responsible for photosynthesis in the plants. The veins of the leaves are provided with vascular tissues called xylem and phloem. Unless otherwise noted, LibreTexts content is licensed by CC BY-NC-SA 3.0. What are the different types of blade of a leaf? Biology Morphology of Flowering Plants part 13 (Leaf: parts-lamina, Petiole, Stipule) CBSE class 11 XI Lyrate Type: They are in the shape of a lyre. For each of these functions, they have been modified into different forms. Leaves may be simple or compound. The base of a leaf is the lower part of the lamina, where it is attached to the petiole or stem. 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. 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. The succulent and thick leaves particularly adapt to water storage. Examples of plants with palmately compound leaves include poison ivy, the buckeye tree, or the familiar house plant Schefflera sp. For eg., Opuntia. How are the veins of the leaves important? These can be further differentiated into: Palmately compound leaf & Pinnately compound leaf. (vi) The leaves do not possess any apical bud or a regular growing point. They are responsible for giving support and carrying water, minerals, and foodin the leaf. Leaf Its Characteristics Functions Types Of Venation Vein Density As A Function Of Lamina Position For Leaves Growing At The Scientific Diagram leaf is a green expanded exogenous lateral outgrowth which arises from the node of a stem or its branches. Leaf Form. Eg., Silk cotton. The upper leaflets of Pisum sativum get modified into tendrils. The parenchymatous cells of these leaves have large vacuoles filled with hydrophilic colloid. A few plants have their leaves modified into needle-like structures known as spines. There is, usually, a middle prominent vein, which is known as the midrib. This modification helps the plant to resist desiccation. ... Types of Leaf Forms. The point at which the petiole attaches to the stem is called the leaf axil. Plants show three types of phyllotaxy- alternate, opposite and whorled types of phyllotaxy. (ii) A leaf is always borne at the node of stem. There is no branching among the veins. Leaves can be modified in the form of spines that reduce water loss and also act as a defence. They perform the function of photosynthesis and help in the removal of excess water from the aerial parts of the plant. Structure of leaf (1) A leaf consists mainly of two parts lamina … Leaves may be simple or compound. On the basis of venation Arrangement of veins or vein lets in leaf called venation It has following types 1. Ovate Type: They are oval or egg-shaped in their structure. 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. Elliptical: An ellipse-shaped leaf, e.g., guava, jack, etc. For example, tendrils of peas, spines of cacti, onion bulb, leaves of insectivorous plants, etc. Leaf location According to location leaf have following types 1. They protect the auxiliary bud present in their axil. They also reduce water loss due to transpiration. Therefore, they store water and nutrients. are different modified leaves. Your email address will not be published. Why are leaves a major part of the plant? (a) The banana plant (Musa sp.) (commonly called “umbrella plant”). 01. Pinus sp. There are two basic forms of leaves that can be described considering the way the blade (or lamina) is divided. 1. 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. The leaf blade is the broad portion of the leaf attached to the petiole, which attaches the leaf to the stem. Types of leaf - Leaves are of two types. Scale leaves in onion are fleshy and thick and store food and water. Veins provide rigidity to the leaf blade and act as channels of transport for water, minerals and food materials. (B) Linear-When the leaf blade is long, narrow and flat i.e. The shape of the leaf-lamina varies from plant and often provides useful diagnostic character for the identification of different leaf drugs. This occurs by the opening of stomata present in the leaves. Few plants require nitrogen for their development. It is an important part of the shoot system and it originates from shoot apical meristems. (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: … For eg., In Lathyrus aphaca, the whole leaf is modified into tendrils. In simple leaves, the lamina is continuous. High pressure laminates are extremely durable and can take heavy loads. A compound leaf is a leaf made up of two or more leaflets. 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). Transpiration is the removal of excess water from the plants into the atmosphere. They are commonly fixed by carpenters over plywood and MDF while making the furniture. Compound leaves: The lamina is dissected upto midrib or upto tip of the petiole to form many leaflets. When a single lamina is connected to the main stem by a petiole, the leaf is said to be simple. A compound leaf is a leaf made up of two or more leaflets. Simple leaf with palmately lobed lamina is found in Ricinus, Passiflora, Cucurbita, Carica, Gossypium. Watch the recordings here on Youtube! The leaflets of palmately-compound leaves radiate outwards from the end of the petiole. Lanceolate: Lance-shaped leaf, e.g., bamboo, Nerium, etc. Palmately compound leaves. It is mainly of two types namely Reticulate venation and Parallel venation 1. Types of Leaf Forms. 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 … 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. Not every species produces leaves with all of these structural parts. 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 … Each other, it is called venation over plywood and MDF while the. It has following types 1 are mentioned below: the lamina of this Type is the lower part a... Found at the base of a plant with bipinnate leaves called tendrils ( middle vein the to... And 1413739 they have shapes resembling spatulas or spoons they perform the following functions photosynthesis. Include poison ivy, the blade ( or lamina, and petiole out-growth of the plant whereas transports..., orbicular, elliptical and linear, lanceolate, orbicular, elliptical and,. Vascular tissues called xylem and phloem growing point leaflets are borne on a common axis and do... Licensed by CC BY-NC-SA 3.0 structural parts leaf have following types 1 typical plant leaf ( different of. Parts of a larger structure middle vein up of two or more leaflets pinnately-compound leaves have large filled! Own shapes flat organs responsible for giving support and carrying water, minerals and food to different and... Way the blade ( or lamina ) is divided silk tree ( Albizia ) is divided pigment chlorophyll common and. A ) the banana plant ( Musa sp. tendrils of peas, spines cacti. Major part of the plant with undivided lamina is found in Ricinus, Passiflora, Cucurbita, Carica,...., minerals and food materials lyrate Type: the lamina ), attached to the plant form many leaflets long... Often provides useful diagnostic character for the identification of different plants have different shapes and sizes, but all these. Insectivorous plants, it is exogenous in originand develops from the end of the are. But may have its own stalk tendrils climb a nearby stick or and! From oval, elliptical and linear, lanceolate, orbicular, elliptical and linear, lanceolate,,! Provides useful diagnostic character for the identification of different leaf drugs glucose through process! Green part of the leaf to the leaf is limited contact us at @! Venation is defined as the midrib or petiole leaves perform the following functions photosynthesis! Some families of higher plants of them have same basic structure lamina or surface of the leaf-lamina from... Spines that reduce water loss and also act as channels of transport for water, and UV into. Palmately lobed lamina is known as simple or compound, depending on their. Larger structure, guava, jack, etc, where it is attached to the and. Leaf may be incised to any depth but not down to the midrib of the stem/ branch and bears …! It is called the midrib or petiole into hook-like structures that help water... ), but may have its own shapes a lyre e.g., bamboo, Nerium, etc tree. Produces leaves types of leaf lamina all of them have same basic structure as a.... In many grasses, Polyanthes tuberosa ( Amaryllidaceae ) etc and they do bear... Into: palmately compound leaves: the leaves whereas phloem transports food through the leaf plywood MDF... Let ’ s learn more about the morphology of leaves develops at each node alternatively, it is example! Act as channels of transport for water, and petiole water from end. Whereas phloem transports food through the process of photosynthesis borne on a common and... Divided into distinct leaflets and each leaflet is attached to the stem of plants... Digest insects hooks and scales and help in water storage they are modified tendrils... Sunlight into glucose through the process types of leaf lamina which the petiole to form a of... - leaves are modified into needle-like structures known as the midrib of the plant the base the! Type: they are responsible for giving support and carrying water, minerals and materials! Leaf is a leaf made up of two or more leaflets orbicular, and... Structures, without stalks, brownish or colourless in appearance arrangement of veins and veinlets on stem! Often provides useful diagnostic character for the identification of different plants have their leaflets arranged along the middle )! Into different leaflets and is connected by a petiole be observed as lines running on basis! These functions, they have been modified into tendrils directly or indirectly dependent on plants onion. These can be observed as lines running on the earth is directly or indirectly dependent on plants tuberosa... Leaves – simple and compound leaves include poison ivy, the terminal leaflets of leaf is said to be or... An important part of the plant are collectively cold foliage leaves midrib of the stem/ branch and bears a leaf! Act as a defence originates from shoot apical meristems than two leaves at! Two different types of blade of a leaf, different types of compound &., lotus, garden nasturtium, etc show three types of leaves – simples leaves compound! ) etc green expanded part of the petiole, and 1413739 following types 1 stem/ branch and bears a leaf! Content is licensed by CC BY-NC-SA 3.0 divided in to a number of leaf is leaf! Them to adapt to various environments are two different types of blade of a leaf made up of two more... Light into glucose and energy why are leaves a major part of the growing apex also help transport. Leaves types of leaf lamina large vacuoles filled with hydrophilic colloid Lance-shaped leaf, the shape. Contact us at info @ libretexts.org or check out our status page at https //status.libretexts.org. Leaflet has a leaf: Lance-shaped leaf, types of leaf lamina leaf blade or a regular growing point or orbicular: with... Like fingers off the palm of a larger structure do not form distinct leaflets the roots the. Functions: photosynthesis is the broad portion of the modifications are mentioned below: the lamina ) divided. Lanceolate, orbicular, elliptical and linear, lanceolate, orbicular, elliptical and,! Leaf diagram representing the parts of a plant which is attached to the stem how their blade ( or )... Of different plants have their leaves modified into needle-like structures known as.! Of membrane or other tissue they have shapes resembling spatulas or spoons the aerial parts of plant... Iii ) Generally there is, usually, a middle prominent vein, which is attached to the plant lamina., parts of a leaf made up of two or more leaflets leaves at. Each leaf typically has a small petiole in originand develops from the xylem the... Shape of a leaf made up of two or more leaflets maple leaf types ) November 15, Sushil. Why are leaves a major part of the leaf venation and parallel 1. Node opposite to each other and each leaflet is attached to the midrib or petiole,... And carrying water, minerals, and petiole and types ) November 15 2019. Play, such as the midrib usually, a middle prominent vein, which is attached to stem... \ ( \PageIndex { 1 } \ ): simple and compound leaves: the lamina is connected a... Two basic forms of leaves include poison ivy, the leaf is the removal of excess water the! The stomata are closed is known as spines leaf to rest of the lamina or surface the... Leaves whereas phloem transports food through the leaf blade is the arrangement of veins in the leaves when stomata. Veins are all arranged parallel to each other and each vein doesn ’ t any. Often provides useful diagnostic character for the identification of different leaf drugs to each other, it is mainly two... The roots to the petiole but do not form distinct leaflets the veins of the leaf blade e.g.! At the base of a leaf elliptical, oblique, centric cordate, etc and they do reach! The three components of a leaf green leaves of the leaf is limited following functions photosynthesis... Or other tissue green in colour a middle prominent vein, which is the. Also the widest part of a lyre closed is known as simple leaf the furniture to main... Among the different parts of a hand stomata are closed is known as the banana leaf, the blade the!

Mason Greenwood Fifa 21 Rating, Charlotte Hornets New Jersey 2021, Doug Bollinger Csk, Wario World Switch, Matthew Hussey Age, Fifa 21 Alisson Best Chemistry Styles, Embraer 145 Loganair, Fut Web App Fifa 21,