The Poaceae (also called Gramineae or true grasses) are a large and nearly ubiquitous family of monocotyledonous flowering plants. They are terrestrial, annual herbs. It is a small family of heterostylous aquatic plants, occurring in tropical and subtropical waters. Plant monoecious, diclinous; two kinds of flowers in different inflorescences; male in staminate and female in pistillate inflorescence respectively. Moringaceae: Characters, Distribution and Affinities . Floral Formula and Important Families of Flowering Plants, Class 11 Biology NCERT Solutions. Poaceae (Gramineae) - the Grass Family. The family consists of plants that are generally cultivated as crop plants for food. Stem-Triangular, solid, without nodes. What is the significance of transpiration? Adventitious, fibrous, branched, fascicled or stilt (Zea mays). 9. B. tulda, B. vulgaris are used for scaffolding, thatching huts etc. 7. There are 3 stamens that hang down and the anthers shed pollen into the wind. Lubricant and purgative: Castor oil (IA and Conon oil ( jL i n are used as purgatives. Floral characters. Poaceae or Gramineae is a large and nearly ubiquitous family of monocotyledonous flowering plants known as grasses. This plant family is distributed throughout the world. Root: Adventitious stilt roots. Top Answer. Oryza sativa 3. MCQs on Floral Formula. Poaceae 1-Floral formula. 3. The term 'floret', when applied to grasses, refers to the flower and two 'fertile' bracts that usually enclose the flower, the lemma and palea. Family: Poaceae. Poaceae. There are one-hundred fifty eight (158) genera and four-hundred ninty two (492) species of this family are present in Pakistan. lemma. Content Guidelines 2. The members are cosmopolitan in distribution. Simple, alternate, green, exstipulate, entire margin, acute apex, sheathing leaf base, at the junction of leaf-sheath and leaf-blade membranous ligule present, parallel venation. They rank among the top five families of flowering plants in terms of the number of species, but they are clearly the most abundant and important family of the Earth’s flora. Bracteate (Lemma or inferior palea) pedicellate, complete, hermaphrodite, zygomorphic, small hypogynous. ... POACEAE/GRAMINAE:GRASSES/GRAINS Corn, rice, wheat, lemon grass, sugar cane. It has importance both for human beings and animals. The Virtual Floral Formula is a Web bite thai lets students practice their floral structure interpretation skills using detailed dissection photographs of the flowers of 12 species. The Gramineae or Poaceae is the grass family which is the largest among Monocots. Poaceae, formerly called Gramineae, grass family of monocotyledonous flowering plants, a division of the order Poales.The Poaceae are the world’s single most important source of food. Herbaceous, erect, cylindrical, fistular, nodes and internodes are present, green. Share Your Word File
Latest Comments. Floral formula and floral diagram. MCQs on Floral Formula. Uncommonly, flowers may have no axis of symmetry at all, typically because their parts are spirally arranged. In India the family is represented by 180 species and 30 genera. Avena (oats) Oryza (rice) Triticum (wheat) Saccharum (sugarcane) Zea (corn) Bambusa (bamboo) Pennisetum polystachyon Eleusene coracana. Answer: (a) 2. Yeast: Origin, Reproduction, Life Cycle and Growth Requirements | Industrial Microbiology, How is Bread Made Step by Step? hermaphrodite, the other is sterile or male usually. All the cereals and millets belong to this plant family. formula and floral diagram. Below is the floral formula along with the floral diagram for both male and female flowers. This is a question and answer forum for students, teachers and general visitors for exchanging articles, answers and notes. Floral formula: Distribution of Apiaceae: The family is commonly called carrot family. Welcome to BiologyDiscussion! 8. 2 Lodicules are present (Presenting Calyx and corolla) forming Perianth. How many different kinds of animals are there? Tricarpellary, syncarpous gynoecium is found in these flowers (a) Liliaceae (b) Poaceae (c) Fabaceae (d) Solanaceae. Stamens 3, polyandrous, filament long, anthers dorsifixed when young and versatile when mature. At the base of rachilla two sterile scales, called glumes, are present. The spikelet consists of a short axis called rachilla on which 1 to many sessile or short stalked flowers are borne. In a spikelet one floret is perfect i.e. Poaceae 1-Floral formula. The staple food grains of the population of world is derived from Oryza sativa (Rice) and Triticum aestivum (Wheat). Important Types. Root System: Taproot system. Floral formula. Floral parts are calyx(K), corolla(C), androecium(A) and gynoecium(G). Floral Formula: Br. Incomplete:( those flower which is missing one/two whorls). Poaceae 1-Floral formula. Represented by membranous scales called the lodicules. The family consists of plants … Each flower is enclosed by inferior and superior palea. Alternate, simple, long ligule present, linear, entire margin, green, multicostate parallel venation, sheathing leaf base. 5, pages 276-280. Below is the floral formula along with the floral diagram for both male and female flowers. The family stands first and foremost in respect of economic importance in whole of Angiosperms. Besides these a number of grasses are grown to form fine lawns, play grounds etc. Floral characters. Senna forms a Cytmetera. 13 glumes. Florets are arranged in spikelets, these subtended by a pair of glumes. The number of each part in the flower is indicated with a superscript number after the letters. Alternate, simple leaves. 1 See answer rameshgiri19990916 is waiting for your help. Economic Importance of Papilionaceae. Flowers are arranged in distinct inflorescence. Caryopsis (achene with pericarp completely united or adherent with the seed coat) or rarely nut (Dendrocalamus) or berry (Bambusa). The 2 sepals are modified into lodicules. Monocarpellary, unilocular, (theoritically tricarpellary) superior, single ovule, basal placentation; style filiform, long; silky, stigma hairy. Mostly herbs, stem jointed, fistular, cylindrical; leaves simple, alternate, sheathing, sheath open, ligulate; inflorescence compound spike; flowers zygomorphic, hypogynous, protected by palea; perianth represented by 2 or 3 minute scales (lodicules); stamens 3, versatile; carpel one, style 2 or 3, stigmas feathery, basal placentation; fruit caryopsis; testa fused with pericarp. 2. Monocarpellary, theoritically tricarpellary, ovary superior, unilocular, single ovule, basal placentation, style short; stigma 2, feathery. Atom The flowers of Poaceae are small, lack petals, and are pollinated by wind. It is used to describe the salient features/characteristics of a flower with the help of certain symbols and signs known as floral symbols. There will be total 10 MCQ in this test. The glumes are placed one above the other on opposite sides. Vetiveria zizanioides (H. Khus khus) yields vetiver oil from the roots. It was constructed in ToolBook (SumTotal The American Bioh^y Teacher, Vol. The Poaceae (also called Gramineae or true grasses) are a large and nearly ubiquitous family of monocotyledonous flowering plants. Wiki User Answered . A floral formula is a written shorthand used to represent the structure of a flower using the standard set of symbols shown at the right. Floral diagram of poaceae family with floral formula? 8. Some species of Bambusa e.g. Saccharum officinarum (Sugarcane; H. Ganna) is cultivated for gur and sugar. ... Floral diagram with floral formula (Oryza sativa or rice): Some important plants of the family: Oryza sativa (Rice) Triticum aestivum (wheat) Zea mays (maize) It has six hundred (600) genera and ten thousands (10,000) species. glumes. Welcome to BiologyDiscussion! (A-l) Capsella bursa-pas- Triticum aestivum 4. Exploded spikelet of brome grass. Figure 8.92 Brassicaceae (Cruciferae). This sub-family is divided into 3 tribes. Food: Most of the important pulses are belonged to this family. Answer: (a) Both the glumes are boat shaped and sterile. Floral symmetry describes whether, and how, a flower, in particular its perianth, can be divided into two or more identical or mirror-image parts. 12 Reproductive characters. Perfect: Those flower which containing only essential whorls (Androecium & Gynoecium) Zygomorphic: Capable of division into symmetrical halves by only one longitudinal. Answer. % P lodicules A 3 or 1-6 G 1 or (2) Economic importance. The four major floral parts are always shown in the same order; sepals (CA), petals (CO), stamens (A), and carpels (G). The lemma frequently bears a long, stiff hair called awn. A caryopsis completely enclosed by the flowering glume and palea. The fruit produced by a grass flower is almost always a seedlike grain or caryopsis, a dry indehiscent one-seeded fruit with the pericarp adnate to the seed (in an achene the pericarp is free). Since true flower parts in grasses are inconsequential in identification, spikelet arrangement will be used for description of the inflorescence type. palea. Each unit of inflorescence is spikelet. Poaceae includes the cereal grasses, bamboos and the grasses of natural grassland and cultivated lawns and pasture. The four major floral parts are always shown in the same order; sepals (CA), petals (CO), stamens (A), and carpels (G). 1. They are cultivated from time immemorial. The spikelets are arranged in various ways on the main axis called rachilla. Bambusa bamboo 7. Capparidaceae: Characters, Distribution and Types. The APG IV system of 2016 (unchanged from the APG III system of 2009, the APG II system of 2003 and the APG system of 1998) places the family in the order Commelinales, in the commelinid clade, in the monocots. Floral Formula: Br. Floral formula: Distribution of Sapotaceae: Sapotaceae includes 40 genera and 60 species of primarily tropical trees common in old world. Leaf: Alternate, simple, long ligule present, linear, entire margin, green, multicostate parallel venation, sheathing leaf … They are terrestrial, annual herbs. They may be terrestrial or aquatic. lemma. 4. What is floral formula for family poaceae? Leaves: Alternate, simple or pinnately compound (rarely); exstipulate; reticulate venation. Food: Several species of Achras sapota (H. Chiku), Manilkara kauki (H. Khirini), Manilkara hexandra, Mimusops elengi (V. Maulsari), Bassia longifolia yield juicy edible fruits. These species generally have four free perianth segments that have a zygomorphic arrangement, four stamens with very short filaments that are joined to the perianth segments, and a gynoecium consisting of a single carpel with a superior ovary. Inflorescence: Racemose- terminal or axillary raceme; Cymose- solitary in Solanum. The plants are distributed almost throughout the world except the arctic regions. Spikelets mostly two flowered, rarely one flowered, falling entire at maturity with their stalks and glumes. The family is commonly known as grass family. Floral digram of grass spikelet 13. Many grasses as Cynodon dactylon, Panicum, Cymbopogon, Agrostis, Poa are grown for fodder. The flowers of Poaceae are small, lack petals, and are pollinated by wind. This sub-family is divided into 8 tribes. Share Your PDF File
Following are the characteristic features of the Solanaceae family: Vegetative Characters. 25 26 27. Many grasses yield scented oils which are used in perfumery viz. Distribution of Poaceae 3. The flowers of Poaceae are small, lack petals, and are pollinated by wind. The Virtual Floral Formula. This oil is applied externally for skin diseases. % ⚥P 2 (lodicules) A 3 G 1. Hutchinson (1964), Butzin (1965) and Takhtajan (1969) placed the families into 2 separate orders, the Cyperales and Graminales on the basis of many differences viz., 1. leaf sheath, 2. jointed and unjointed stem, 3. single bract and lemma and palea, 4. seed coat etc.
2020 floral formula of poaceae