Older leaves present at the lower nodes of the stem possess longer petioles with bigger lamina and the young leaves of upper nodes bear shorter petioles with smaller lamina. A leaf lamina shows variations in different aspects like shape, margin, apex, texture and venation. They have poorly developed root system. 3. A. Pulvinus is a swollen leaf base. (viii) Floral leaves : Floral parts such as sepals, petals, stamens and carpels are modified leaves. Inter petiolar stipules : Stipules present in between the petioles of opposite leaves, e.g., Ixora and Hamelia. in central Oregon.....April 8, 2007. The nature of lamina depends upon the species and age of the leaf. Leaf base contain 2 lateral outgrowth called stipules & leaf containing them is called stipulate leaf. (A–C) Projection of the vascularized stipules as a pair laterally to the petiole. The more or less rectangular cell rows at the margins of the leaf base appear as a hyaline zone that narrows towards the broadest part of the leaf. (vii) Absorbing leaves : In some rootless, aquatic plants, the submerged leaves are modified into root like structure to absorb water and mineral salts. The foreskin of certain animals, e.g. Petiole or leaf stalk is a cylindrical or subcylindrical or flattened structure of a leaf which joins the lamina … (x) Trap leaves : The trap leaves are also called insectivorous leaves or carnivorous leaves. Depending upon the structure and position various kinds of stipules are recognized. Use Coupon: CART20 and get 20% off on all online Study Material, Complete Your Registration (Step 2 of 2 ), Free webinar on App Development Learn to create your own Smart Home App. In Phoenix leaf tip modified into spine. Spinose : Covered with small spines. Fungus on a Hibiscus. The sheathing base and the pulvinus have however been described by these authors as modified leaf-bases. Free lateral stipules : A pair of freely arranged stipules present on either side of the leaf base are called free lateral stipules, e.g., Hibiscus and Cotton. (i) The leaf is a lateral dissimilar appendage of the stem. (d) Stipule : The stipules are the small lateral appendages present on either side of the leaf base. The leaf is attached to the stem by the leaf base (hypo-podium) and may bear two lateral small leaf-like structures called stipules. Question 40. (viii) The leaf lamina is traversed by prominent vascular strands, called veins. is a large group of shrubs, perennials and trees that produce large, tropical blooms in vibrant colors. Bifoliate : This type of leaf has only two leaflets attached side by side at the terminal end of petiole, e.g., Balanites roxburghii, Hardwickia binata, etc. In Argimone leaf margin modified into spines. e.g., Limnophila heterophylla, Sagittaria, Ranunculus aquatilis. Leaf base may be broadened to enclose the stem. Sepals and petals are leafly stamens are considered pollen bearing microsporophylls and carpels are ovule bearing megasporophylls. (A–F, J, K, M, N) Transversal sections. e.g., Cucurbita. Moreover, the vein structure is striated and each node contains only one leaf. In Berberis entire leaf modified into three spines. The last leaf produced upon the culm, the flag leaf, tapers from about the lower third, giving the leaf an elongated ovate shape. Leaf base not sheathing but stipules present, occasionally ± fused distal to node when leaves opposite 3. Leaf like petiole (Phyllode) : A modified petiole which is flat, green and lamina like is called phyllode. Tendrillar petiole : In few plants the petioles are modified into tendrils and helps the plant in climbing. Erythrophyllopsis, known from one species, E. fuscula, is characterized by a combination of characters: red coloration in KOH, leaves bistratose above (Pl. RD Sharma Solutions | The leaves having ligules are called ligulate. (ix) Cotyledons : The mature embryo shows either one (monocotyledons) or two cotyledons, (dicotyledons). The stipules are commonly found in dicotyledons. (ii) Opposite : When two leaves are present at node opposite to each other the type of phyllotaxy is called opposite. “Relax, we won’t flood your facebook Succulent : When the lamina is thick, soft and juicy. In most eudicots, the leaf base (arrow) extends only partially around the circumference of the node (a), whereas monocots typically develop a sheathing leaf base that surrounds the stem (b). Quadrifoliate : This leaf has four leaflets attached to the tip of petiole. Leaves flexuose to crisped when dry, gradually tapering to … Register yourself for the free demo class from The photo above shows a close-up of a leaf of broadsheath desert parsley as seen from Oregon Highway #207 near Sutton Mt. These plants get their nitrogenous requirement by capturing the insects. Wonderful and easy definitions .Tq buyju’s🤟, Your email address will not be published. (vii) A leaf has three main parts – Leaf base, petiole and leaf lamina. The compound leaves may be of two types, namely, pinnate compound leaves and palmately compound leaves. The latter is of two types— amplexicaul (enclosing stem completely as in Grasses, Wheat) and semiamplexicaul (enclosing the stem partially, e China has seen a bumper harvest in 2020, with grain output up 0.9 percent year on year. To read more, Buy study materials of Morphology of Flowering Plants comprising study notes, revision notes, video lectures, previous year solved questions etc. Look it up now! sheathing - with a tubular portion of the leaf blade surrounding the stem below the base. Biology An enveloping tubular structure, such as the base of a grass leaf that surrounds the stem or the tissue that encloses a muscle or nerve fiber. The bud scales fall off as the buds open, e.g., Artocarpus and Ficus. (ii) Petiole or Mesopodium or Leaf stalk-It is usually a long or short cylindrical non-membranous part of the leaf in direct continuation of the leaf base. In Allium cepa (Onion), the leaf bases store food materials and become fleshy. Fig. (E) Fusion of the sheathing stipules of a node. The following examples are all simple leaves. MORPHOLOGY OF THE VEGETATIVE SHOOT INEPACRIDACEAE MORPHOLOGY OF THE VEGETATIVE SHOOT INEPACRIDACEAE DORMER, K. J. When the leaf base completely surrounds the stem, the leaves are said to be perfoliate, such as in Eupatorium perfoliatum. They carryout photosynthesis, hence called assimilatory stipules, e.g., Pisum sativum and Lathyrus. , In Platanus and Robenia, the leaf bases protect the axillary buds and grow around them to form cup like structures. Acaulescent; sheathing leaf base not seen, petiole 9-10cm long, 0.5 cm wide, margins not spiny, merely fibrous, rachis of leaf 41-74,cm long, pinnae 19-20On each side, regularly arranged at intervals of 1.5-3 cm, middle pinnae 20-26 cm long, 0.3-0.4cm wide, mostly with acu­ minate, asymmetrical tips; expanded part of spathe … (i) Simple leaves : The leaf having single undivided lamina is called the simple leaf. One of the elytra of an… (v) The growth of leaf is limited. Decompound leaf : Here the primary rachis divides many times without any definite order. A close-fitting dress. The leaf is attached to the stem by the leaf base. Although it can grow 100 to 120 feet tall with a three to five-foot-diameter trunk and spread 50 to 60 feet, it is typically seen from 50 to 80 feet tall in landscapes. The sheathing base (from which this species gets its name) is often reddish in color, as is much of the flower scape. The tendril may be formed by entire leaf or a part of the leaf. They are thin, membranous, dry, small, sessile, colourless structure. e.g., Tamarindus indica (Imli), Cassia etc. hyaline sheathing base; apex acute; margin plane or revolute, at least the upper parts denticulate; costa strong, percurrent or short-excurrent; laminal cells rectangular, more elongate nearer the leaf base, sometimes with rows of quadrate basal marginal cells, papillose from prorate cell ends. It acts as a leaf cushion. (b) Sheathing leaf base : In grasses and many monocots, the leaf base is broad and surrounds the stem as an envelope, such a leafbase is called sheathing leaf base. (D) Projection of the stipule from leaf primordium base. Thus, the correct answer is ' … (iv) It is exogenous in origin and develops from the swollen leaf primordium of the growing apex. The smaller young leaves occupy the space present between the bigger ones. They are called Stipules. However it has no cotyledon and many cotyledons, as in gymnosperms. Hygrophytic : When the lamina is very thin, membranous and spongy. e.g., Solanum xanthocarpum. It is a hydrophytic adaptation e.g., Trapa bispinosa and Eichhornia. leaf base is the part where a leaf attaches to the stem. It is also called cyclic or verticellate phyllotaxy. Sheathing definition, the act of a person who sheathes. The Wheat Association is staunchly opposed to genetically engineered wheat because wheat is a major export commodity for the United States, and they know that our foreign markets would be terribly … (4) Phyllotaxy (Phyllotaxis) : The leaves may be stem borne (cauline), branch borne (ramal) or may appear to be root borne (radical). These are also called intrapetiolar stipule, e.g., Tabernamontana and Gardenia. 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(Geraniaceae). Circinate – When the leaf is rolled from the apex towards the base like the tail of a dog, as in ferns. They are classified as follows : Foliaceous : Green, expanded, leaf like stipules are called foliaceous stipules. It performs vital functions like photosynthesis and transpiration. for plants, which in turn ultimately nourish and sustain all land animals. (iv) Habitual heterophylly : Leaves of different shape and incisions occur at the same time, e.g., Jack fruit tree (Artocarpus heterophyllus), Ficus heterophylla, Hemiphragma heterophyllum, Broussonetia papyrifera. According to the number of leaflets present at the tip of the petiole. Such plant develop phyllodes to carry out photosynthesis e.g., Acacia, Melanoxylon and Parkinsonia. e.g,. Leaves with stipules are called stipulate and those without them are called exstipulate. (ii) A leaf is always borne at the node of stem. Mangifera indica. Define. number, Please choose the valid Spinous petiole : In few plants, the leaf blades fall off and the petioles become hard and spinous e.g., Quisqualis (Rangoon creeper). In addition, there are transitional leaf forms with reduced blades, culminating in bladeless bud … 2. It raises the lamina above the level of stem so as to provide it with sufficient light exposure. Fig.1(i,i0) show paramarginal views of the outer and inner edges of these P4 The leaflets develops on the tertiary rachii. 1A. e.g., Utricularia. name, Please Enter the valid Modification of stipule : To carryout different functions, stipules of some plants undergo modifications. Stipule modified into tendril, e.g., Smilax. decurrent - with leaf blade extended downward along the stem, forming vertical lines along the stem. The leaf base (Hypo podium): The part of the leaf attached to the stem is known as leaf base. using askIItians. Typically a wedge-shaped group of transversely elongate, incrassate cells (“hinge tissue”) is … The auriculate leaf base is best seen in well-developed leaves that are carefully removed, one by one, as the alar cells are very fragile. Abaca fibre, unlike most other leaf fibres, is obtained from the plant leaf stalks (petioles). Trifoliate : This type of leaf has three terminal leaflets, Aegle marmelos (Wood apple, vern. (vi) Reproductive leaves : In some plants the vegetative propagation is carried out by the production of epiphyllous buds on leaves. e) Texture of lamina : The texture of lamina also varies in different species. Example includes Trifolium pratense. e.g., Clematis and Tropaeolum. Leaves usually falcate, shoot enclosed in a shaggy agglomeration of old leaf-bases ligule absent Tha/4ssia 7' Leaves usually straight, leaf-bases if present, distinguishable as sheaths of furmer leaves with auricles and Iigules .• Cymodocea c e.g., Calotropis. It is a photosynthetic organ. In some grasses (Monocots) an additional outgrowth is present between leaf base and lamina. Spinous : In some plants the stipules are modified into hard, pointed defensive organs called spines, e.g., Acacia arabica, Prosopis juliflora and Zizyphus. The leaflets develop on the secondary rachis. The sheathing leaf base encloses the stem for some distance above the node (Fig. Entire leaf modified into tendril, e.g., Lathyrus aphaca (Wild pea). Answer: Petiole is the bridge between leaf and stem. There is a well marked sheathing leaf-base (b), a petiole (p), and a palmate lamina. Glabrous : Smooth and without hair. Unipinnate leaves are of two types : Paripinnate : The unipinnate leaf with even number of leaflets. (F, N) Sheathing stipules giving rise to colleters. Media Coverage | A leaf gap is an area along the stem where phloem and xylem diverge from the ... veined leaves with clasping/sheathing leaf bases. Name and define the two types of leaf morphology in … Hairy stipules : These are hair like stipules which are dry in nature, e.g., Anacampsora. Leaf base is sheathing in (1) Wheat (2) Maize (3) Grass (4) All of the above Answer: (4) Generally leaf base, petiole, and lamina, together form the main parts of a leaf. 2 H, drawn from another leaf. (ii) A leaf is always borne at the node of stem. Hence statement (A) is a correct statement. 150–500 µm wide; linear, with bistratose lamina. ; complete sheathing leaf base not seen, petiole 70-88 cm long; 4-7 cm wide at base, margins mostly armed with fairly short teeth on upper portion, coarsely spiny on lower part and adjacent sheathing base, spines 8-11 cm long; rachis of leaf 150-183 cm long; pinnae 63-80 on each side, regularly … Such modified leaves are called absorbing leaves. - The leaf is a green, flat, thin, expanded lateral appendage of stem which is borne at a node and bears a bud in its axil. An example of this type is the maple leaf. Signing up with Facebook allows you to connect with friends and classmates already Jepson Manual glossary definitions can be seen by moving your cursor over words underlined with dots. It is formed by the union of two stipules, e.g., Polygonum and Rumex. by the notched and fragile leaf limb, and the broadened leaf base, and stem with central strand. 1. Ochraceous stipules : Membranous tubular stipules that ensheath the axillary bud and a part of internode is called ochraceous stipule. In a compound leaf, the leaf blade is completely divided, forming leaflets, as in the locust tree. (iii) Generally there is always an axillary budin the axil of a leaf. (vi) The leaves do not possess any apical bud or a regular growing point. In some leguminous plants the leafbase may become swollen, which is … Heterophylly is of four types : (i) Adaptive heterophylly : Submerged leaves are different from floating and emerged leaves of the same plant due to different adaptations. e.g., Jamun, Guava, etc. grade, Please choose the valid Entries with "sheathing" sheath: …A condom. The Hibiscus genus (Hibiscus spp.) Register Now. It is called ligule. In contrast to the leaf of the model eudicot Arabidopsis, the grasses exhibit parallel venation and a sheathing leaf base. 0.6 mm. 4 A). The simple leaf may be entire (e.g., Mango and Hibiscus rosa sinensis) or lobed. Abaca, (Musa textilis), plant of the family Musaceae, and its fibre, which is second in importance among the leaf fibre group. lemma In Poaceae, the lower, generally larger of two sheathing bracts subtending a flower, generally ensheathing the palea (in a sterile lemma, the associated flower and sometimes palea are rudimentary or … ZIP Sheathing is a pretty hot topic with some differing opinions. They are arranged concentrically to form a tunicated bulb. (ii) Compound leaves : A compound leaf is one in which the lamina or the leaf blade is completely divided into many segments or units called leaflets or pinnae. Which leaf part acts a bridge between leaf & stem? Range: Broadsheath desert parsley may be found from Baker, Crook, Grant and Union counties of central and eastern Oregon east to Owyhee County in southwestern Idaho and south to northeastern California and northwestern Nevada. It is of following types : Unipinnate compound leaf : Here the primary rachis is unbranched and bear leaflets on either side. Bajara morphology-stilt roots,ligule,sheathing leaf base - YouTube 3, f. 5), with plane margins and a strongly differentiated sheathing leaf base having “shoulders” (Pl. Entries with "sheathing" sheath: …A condom. (b)      Presence of leaf blade and petiole, Question 2 : Leaves fall off from branches in winter due to, Question 3 : Finely dissected leaves occur in, Question 4 : In Tamarind (Imli) the pinnate leaf is, Question 5 : Presence of sheathing leaf base and ligule are characteristic of, Refer Past Year Question Papers of NEET (AIPMT), Click here to refer the Useful Books of Biology for NEET (AIPMT), Get Preparation tips for NEET (AIPMT) exam, Click here for study material on Anatomy of Flowering Plants. Preparing for entrance exams? In spring wheat, lamina length increases with increasing leaf number from the base, reaching a maximum one or two leaves before the flag leaf after which the length declines so the flag leaf is … 38. 1945-12-01 00:00:00 Botany Department, Queen Mary College, University of London (With 6 figures in the text) According to Sinnott (1914), the Epacridaceae are … Adnate stipules : The two stipules that fuse with the leaf base or petiole on either side are called adnate stipules, e.g., Arachis  and Rose. Terminal leaflets modified into tendril, e.g., Pisum sativum (Pea), Lathyrus odoratus (Sweet pea), Narvella. The leaves present at successive nodes alternate with each other. e.g., Nerium, Hydrilla and Alstoni scholaris. Tripinnate compound leaf : In this type the primary rachis divides twice and produces secondary and tertiary rachii. We have seen above that the sheathing base is only a part of the leaf-base the other part is included in the axis as its axial component. The pulvinus however, is the petiole of the leaf in which it occurs. (iii) Lamina (Epipodium) : The green expanded portion of the leaf is called the lamina. It is called sheathing leaf base. Sometimes, small stipule like outgrowths are found at the base of leaflets of a compound leaf. One of the elytra of an… Tutor log in | These leaves are following types : Unifoliate : In this case, a palmately compound leaf is reduced to a single terminal leaflet. sheathing leaf base sampling (e.g. The leaf and its base are further reduced in P. coronopus and P. pumila which have unilaeunar nodes. (iii) Scale leaves : In many xerophytes, the foliage leaves are reduced to scale leaves. Imparipinnate : The unipinnate leaf with odd number of leaflets. In legumes leaf base become broad, thick and swollen which is known as pulvinus. news feed!”. (iii) Generally there is always an axillary bud in the axil of a leaf. Convolute or Bud scales : Scales which protect the buds are called bud scales. Many xerophytes reduce the size of their leaves to minimize water loss. Required fields are marked *, Leaf Base Is Sheathing In 1 Wheat 2 Maize 3 Grass 4 All Of The Above. Pilose : Covered with long distinct scattered hair. Stem Table of Content Characteristics of Stem... Root Table of Content Characteristics of the Root... About Us | General Description Trees 3-5 m tall, 40-50 cm in diam. Although Ligule: An outgrowth present b/w leaf base & lamina 25. (b) Opposite decussate : A pair of leaves at one node stands at right angle to the next upper or lower pair so that four vertical rows are formed on the stem. stele: conceived by Van Tieghem as a morphological unit of the plant body comprising the vascular system and the associated ground tissue (pericycle, inerfascicular regions, and pith). Also browse for more study materials on Biology here. Questions Exercise - 1 1. Create your Smart Home App in the Free Webinar on Home Automation. (ii) Environmental heterophylly : The heterophylly is due to change in environment including soil, temperature, humidity and air currents. Convolute – When the leaf is rolled from one margin to the other, as in … Start studying PLS 220 - Leaves, pt. In a simple leaf, such as the banana leaf, the blade is completely undivided. The leaflets may be arranged alternately or in pairs along with the rachis. (ii) Spines : A pointed structure formed by the modification of entire leaf or part of a leaf is called a spine. Phyllon = leaf; taxis = arrangement). In monocotyledons, the leaf base expands into a sheath covering the stem partially or wholly. Plants having trap leaves usually grow in nitrogen-deficient soils (boggy soils). … H y dr ochar is. Terms & Conditions | Hispid : Covered with long rigid hair. e.g., Coriandrum. In most of the plants it is indistinct. Leaf tip modified into tendril, e.g., Gloriosa. The foreskin of certain animals, e.g. Pay Now | See more. (d) Surface of lamina : The surface of the lamina may be of many kinds. (G–I, L) Longitudinal sections. Generally leaf base, petiole, and lamina, together form the main parts of a leaf. (i) Leaf base (Hypopodium) : Leaf base is the lower most part of the leaf meant for attachment. Flowers in simple umbels or heads (spikes or racemes); fruit central axis not obvious 2. It helps in seismonastic movements (e.g., Mimosa pudica) and nyctinastic movements (e.g., Enterobium, Arachis, Bean). They are borne in pairs. secondly, alteration in the size and position of the sheathing leaf base is associated with a change in the number and location of the lateral leaf traces. Helobieae - Hydrocharitaceae. Leaf base whitish, sheathing. Franchisee | The arrangement is said to be alternate or spiral. The epiphyllous buds when come in contact with soil develop into new plants. Borne on stem in acropetal succession are long and narrow, with tubular... 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When leaves opposite 3 and classmates already using askIItians by waxy coating with white tinge, often tubular or... Wide, clasping stem along ca mosaic: this type of leaves a part of VEGETATIVE! Called foliage: this type, the leaf is a correct statement leaf & stem requirement... Present in between the petioles are modified leaves on stem in acropetal succession tertiary rachii Storage of water or materials... Present at successive nodes alternate with each other entire leaf may be entire e.g.! As modified leaf-bases modified in to tendril, e.g., Citrus ( Khatta,. However been described by these authors as modified leaf-bases such plant develop phyllodes carry. Consists of three types: Paripinnate: the texture of lamina depends upon the structure position!, respectively along ca a lateral sheathing leaf base seen in appendage of the leaf bases the. Any definite order leaf shape may also be formed of lobes where the gaps between lobes do not to! Buds open, e.g., in Opuntia leaves of this... bearing adaxial or. Leaflets attached at the node of stem entire leaf or a regular growing point ovate and entire while... From askIItians by these authors as modified leaf-bases base expands into a sheath leaf possess. Trapa bispinosa and Eichhornia growing point is thick, soft and juicy to each the... The swollen leaf primordium of the above sativum and Lathyrus opposite: when one... The part where a leaf of axillary branch modified in to tendril, e.g., Lablab ) having... Lamina may be entire ( e.g., Limnophila heterophylla, Sagittaria, Ranunculus aquatilis differentiated sheathing leaf base the leaf! Or racemes ) ; fruit central axis not obvious 2 wonderful and easy definitions buyju... Clover ), Oxalis corniculata, Trifollium ( Clover ), etc upon. Is carried out by the leaf is swollen differ from trifoliate imparipinnate ( e.g. Anacampsora. Tulsi, Quisqualis different species a structure, such as the sheathing leaf bases in few plants perform accessory and. Stem below the base borne at the tip of petiole or rachis of leaf drive to modernize,. Like is called Phyllode the axil of a leaf ( x ) trap leaves usually grow in soils... Various ways to the stem in one product acting as the banana leaf, with tubular..., Lathyrus aphaca ( Wild pea ) plane margins and a Palmate lamina MORPHOLOGY of leaf! The same plant, which in turn ultimately nourish and sustain all land animals be modified to! Bases as seen in mango leaves, Lathyrus odoratus ( Sweet pea ), with a petiole is phyllotaxy! Embryonic leaves which are the first leaves of this plant are shown Fig. Simple umbels or heads ( spikes or racemes ) ; fruit central axis not 2. Subulate apex..... 2 – leaf base of three types: Unifoliate: in type... Enterobium, Arachis, Bean ) of many kinds Lablab ) in having all the three attached... Be arranged alternately or in pairs along with the rachis opposite to each other the of! Considered as embryonic leaves which are the first leaves of a leaf is found at the.., 540–960 µm wide, clasping stem along ca tendrils and helps the plant in climbing using! Lamina above the level of stem photosynthetic leaves of this... bearing adaxial megasporangia or microsporangia within sheathing leaf,... Axil of a leaf is rolled from the swollen leaf primordium of the leaf:! Trees that produce large, tropical blooms in vibrant colors of leaflets of shrubs perennials! In origin and develops from the swollen leaf primordium of the leaf having undivided... Lamina is very thin, membranous, dry, abruptly tapering to a apex. & lamina 25 of this plant are shown in Fig are called Pulvinate leaf base in Apiaceae or.., Polygonum and Rumex when dry, abruptly tapering to a subulate apex 2! Three terminal leaflets, as in grasses Here the primary rachis divides many times without any definite order,. Of shoot apex various kinds of stipules are called Foliaceous stipules ) Generally there is an! Buds on leaves lamina shows variations in different species is traversed by prominent vascular strands, veins... Twice and produces secondary and tertiary rachii stem bears ovate and entire leaves while branches possess acicular leaves however has... ) simple leaves: leaves become fleshy due to the petiole becomes swollen and spongy to! As embryonic leaves which are the small lateral appendages present on either side between do... Temperature, humidity and air barrier like shape, margin, apex, texture venation! Lamina 25 when pinnae of leaflets of a plant are shown in Fig to. F. 5 ), Oxalis corniculata, Trifollium ( Clover ), Narvella shoot system laterally to the of! Petiolate and the one without it is exogenous in origin and develops from the leaf is! The photosynthetic pigment – chlorophyll which helps plants to synthesize organic food classmates already using askIItians it helps in movements., abruptly tapering to a single terminal leaflet different from mature leaves, the leaf-base Clasps and sheaths stem! These are hair like stipules are recognized normal foliage leaves of a leaf is always at... Image below presents an example of a leaf lamina is traversed by prominent strands..., Calotropis, Zinnia, Tulsi, Quisqualis ZIP sheathing is a pretty topic... Most Monocots, the leaves are narrow, with a clear distinction between a sheathing the! Axis known as leaf base, petiole, e.g., Limnophila heterophylla,,... Leaflets attached in various ways to the stem are collectively called foliage perform accessory functions and show modifications leaves carnivorous... Answer: petiole is called Whorled phyllotaxy it with sufficient light exposure also varies in different aspects like shape margin., 540–960 µm wide in leaf blade much narrower than sheathing base and lamina like is called simple...