All are from flowering plants (angiosperms). In descriptions of multiple leaves, the neuter plural is used, e.g.
Leaf margins of simple leaves may be lobed in one of two patterns, pinnate or palmate. Ending abruptly in a small sharp point as a continuation of the midrib. Having lobes with incisions that extend almost up, but not quite to the petiole. Having lobes with incisions that extend over half-way toward the petiole. This page is taken from the Northern Ontario Plant Database. Repand - margins with very shallow indentations, cut less than 1/16 the distance to the midrib. Ciliate - with hairs projecting out from the leaf margin. Crenulate - margins with small rounded or blunt teeth, diminutive of crenate.
Collect . Having an elongated form with slightly parallel sides, roughly rectangular. In flowering plants, as well as the blade of the leaf, there may be a petiole and stipules; compound leaves may have a rachis supporting the leaflets. With the blade shape different on each side of the midrib.
Involute - with margins rolled inward on the upper surface of the leaf. Revolute - with margins rolled inward on the lower surface of the leaf. Spinescent - (also spinose) with stiff acuminate spines along the blade margin. Sackler Institute for Comparative Genomics, The Parts of a Soybean Seedling (Glycine max, Dicotyledon), The Parts of a Corn Seedling (Zea mays, Monocotyledon). Entire - a smooth margin with no indentations or incisions. Parted - (pinnately or palmately) with lobes cut ½ to ¾ the distance to the midrib. Broad-crenate - margins with widely spaced, rounded or blunt teeth, e.g., many violets (Viola, Violaceae). Leaf structure is described by several terms that include: Being one of the more visible features, leaf shape is commonly used for plant identification.
American Museum of Natural History Having lobes with incisions that extend almost, or up to midrib.
Reversed trullate, the longer sides meet at the base rather than the apex. The same cautions might apply to "caudate", "cuspidate", and "mucronate", or to "crenate", "dentate", and "serrate". Share. Subscribe to our newsletter. Now open! This page presents the terminology used to describe the shapes and forms of leaves.
Oval, egg-shaped, with a tapering point and the widest portion near the petiole. Repand - margins with very shallow indentations, cut less than 1/16 the distance to the midrib.
In pinnately lobed margins the leaf blade (lamina) is indented equally deep along each side of the midrib (as in the white oak , Quercus alba ), and in palmately lobed margins the lamina is indented along several major veins (as in the red maple , Acer rubrum ). Read more about health and safety. How many other trees can you find with this same type of leaf? The New Leaf project is a joint study started in 2018 by Foundations for Social Change, a Vancouver-based charitable organization, and the University of British Columbia. For example, whether to call leaves on the same tree "acuminate", "lanceolate", or "linear" could depend on individual judgement, or which part of the tree one collected them from. Spinescent - (also spinose) with stiff acuminate spines along the blade margin. Having lobes with incisions that extend more than half-way toward the midrib. Lacerate - margins irregularly cut, appearing torn. foliis ovatis 'with ovate leaves'.[7]. Another problem is to establish definitions that meet all cases or satisfy all authorities and readers.
Long and very narrow like a blade of grass.
Involute - with margins rolled inward on the upper surface of the leaf. Leaf margins (edges) are frequently used in visual plant identification because they are usually consistent within a species or group of species, and are an easy characteristic to observe. Erose - with margins appearing gnawed, indentations shallow and irregular. Even needle leaves grow in patterns. Very deeply lobed, the lobes being very drawn out, often making the leaf look somewhat like a branch or a pitchfork. Ciliate - with hairs projecting out from the leaf margin. The Description of Leaves, University of Rochester, https://en.wikipedia.org/w/index.php?title=Glossary_of_leaf_morphology&oldid=982175207, Short description with empty Wikidata description, Creative Commons Attribution-ShareAlike License, Having two leaflets, each leaflet being bifoliolate, With three components, each with three leaflets, Consisting of leaflets all radiating from one point, Having two rows of leaflets on opposite sides of a central axis, see, Leaf blade in one continuous section, without leaflets (not compound), Pinnately compound in which each leaflet is itself bipinnate. Tapering to a long point in a concave manner. Fiddle-shaped; obovate with a constriction near the middle. Palm-shaped, i.e., with lobes or leaflets stemming from the leaf base. An example would be a.
Having lobes pinnately arranged on the central axis.
Palm-shaped, having lobes with incisions that extend less than half-way toward the petiole.
Spoon-shaped; having a broad flat end which tapers to the base, Somewhat blunted, neither blunt nor sharp.
Dissected - with narrow divisions finely subdivided into many smaller segments. Having ear-shaped appendages reaching beyond the attachment to the petiole or to the stem (in case of a seated leaf). Edge and margin are interchangeable in the sense that they both refer to the outside perimeter of a leaf. Leaf margins are cut sharply and irregularly. Leaf margins (edges) are frequently used in visual plant identification because they are usually consistent within a species or group of species, and are an easy characteristic to observe. Authors often use terms arbitrarily, or coin them to taste, possibly in ignorance of established terms, and it is not always clear whether because of ignorance, or personal preference, or because usages change with time or context, or because of variation between specimens, even specimens from the same plant. Spinescent - (also spinose) with stiff acuminate spines along the blade margin.
Lobed - (pinnately or palmately) with rounded lobes and rounded sinuses cut ½ to ¼ the distance to the midrib. folium lanceolatum 'lanceolate leaf', folium lineare 'linear leaf'. For example, it seems altogether reasonable to define a mucro as "a small sharp point as a continuation of the midrib", but it may not be clear how small is small enough, how sharp is sharp enough, how hard the point must be, and what to call the point when one cannot tell whether the leaf has a midrib at all. It is distinct from a simple leaf by the presence of two, Even; with a smooth margin; without toothing, Saw-toothed; with asymmetrical teeth pointing forward, With deep, wave-like indentations; coarsely crenate, Indented, with the indentations not reaching the center, folded upwards, with the surfaces close to parallel, forming a hood, margins and tip curved downward, rolled upwards (towards the adaxial surface), folded downwards, with the surfaces close to parallel, rolled downwards (towards the abaxial surface), opposing left and right halves of lamina folded along longitudinal axis, with one half rolled completely within the other, This page was last edited on 6 October 2020, at 16:00.
The following is a defined list of terms which are used to describe leaf morphology in the description and taxonomy of plants. Much longer than wide and with the widest portion near the tip, reversed lanceolate. The edge of the leaf may be regular or irregular, may be smooth or bearing hair, bristles or spines.
Another characteristic to identify a tree is the way its leaves are arranged on the twigs. Ciliate - with hairs projecting out from the leaf margin.
Crenate - margins with shallow rounded or blunt teeth. Frequently these types of leaves look like they have been torn or ripped. Dentate - margins with pointed teeth directed outward, perpendicular to the midrib. Leaves may also be folded or rolled in various ways.
Asymmetrical leaf base, with one side lower than the other. For more terms describing other aspects of leaves besides their overall morphology see the leaf article.
Pinnatifid - (pinnately divided) with lobes cut pinnately ¾ to almost completely to the midrib. Cleft - (pinnately or palmately) with rounded lobes and convex or straight sinuses cut ¼ to ½ the distance to the midrib. The following examples are all simple leaves.
Leaf Margins Part of the Biodiversity Counts Curriculum Collection.
Incised - jagged margins cut sharply and deeply. With a sharp, elongated, rigid tip; tipped with a cusp. A round leaf where the petiole attaches near the center. Serrate - margins with pointed teeth directed forward, towards the apex of the leaf. Edge and margin are interchangeable in the sense that they both refer to the outside perimeter of a leaf. the distance to the midrib. Pectinate - pinnately divided into fine, parallel segments, comb- or feather-like.
Spear-shaped: Pointed, with barbs, shaped like a spear point, with flaring pointed lobes at the base. folia linearia 'linear leaves'. If the leaves are initially folded in the bud, but later unrolls it is called vernation, ptyxis is the folding of an individual leaf in a bud. Denticulate - margins with small pointed teeth directed outward, perpendicular to the midrib, diminutive of dentate. Shaped like a sword, long and narrow with a sharp pointed tip. Revolute - with margins rolled inward on the lower surface of the leaf. Palmatifid - (palmately divided) with lobes cut palmately ¾ to almost completely to the midrib.
Sign Up.
South Park Movie Netflix, Es Premium, Eratosthenes Contributions To Math, Bears Schedule 2019, I Miss You Songs 2019, Eels Vs Bulldogs Tips, Paul Depodesta Wife, Cincinnati Reds Score, 38- Earthworms-facts-for-kids, Early Voting In Illinois, The Perks Of Being A Wallflower Trailer Soundtrack, Black Mountain Side Lovecraft, Barred Wolf Snake, Clan Of The Cave Bear Tv Series, Microsoft Teams Meeting Collaboration Tools, Is Phil Dunster Married, Axe Throwing Target Ideas, The Borderlands Game, Cogeco Ultrafibre 360 Review, Bible Meaning Rent His Clothes, Andre Royo Tooth, The Last Shot Movie 2020, Goldsmiths, University, Last Minute Luxury Hotel Deals, Tifa Voice Actor, Dallas Cowboys New Uniforms 2020, Cancer Spirit Animal, Best Hashtags For Book Lovers Instagram, Wind Direction Map Toronto, What Is Quick Change Theft, Welcome To The Black Parade Meaning, Erin Timony Bio, Endometrioma Treatment, Types Of Government With Examples, What Is Polling In Microprocessor, Enemy Pie Plot Diagram, Train Band, Microsoft Teams Tasks, Ant Middleton Mutiny On The Bounty, The Shadow From The Steeple Pdf, The Valley Charlton, Fantastic Beasts And Where To Find Them Subtitles, Citizenship Definition For Students, Snake 3d View In Your Space, Ewan Mcgregor Daughter, Html5 Puzzle Game Source Code, Iran National Team Coach, Rattlesnake Bite, Gbenga Akinnagbe Height, Jude Law Net Worth, Madden 20 Playoff Simulation, Mark Rypien Son, Eagles Browns Tickets, Wildebeest Meaning In Telugu, Blueberries For Sal Pdf, Seeing Insects That Aren't There, Jacksonville Jumbo Shrimp Stadium Seating Chart, Gazelle Meaning In Business, Sas Are You Tough Enough 2020, Match Login, Manchester United Best Player 2020, Pineapple Hotel Bellevue, Concise Oxford English Dictionary 11th Edition, Teutoburg Forest, Elearning Portal Login, Tiger In 3d View, Types Of Lizards Pets, Right Reddit, Memory Wall Summary, Google My Location, Travelin' Soldier Mandolin Chords, Not Perfect Synonym Codycross, Enjoythewood Discount Code, Southampton Manager 1994, Serious Meaning In Tamil, St James Park London Map, Nigel Clough Teams Coached,