types of racemose inflorescence with examples

TYPES OF INFLORESCENCE. At the base of the cup, the female flowers develop while towards mouth the male flower develops. 2. Bracts may also occur at the base of individual florets. Save my name, email, and website in this browser for the next time I comment. The young flowers are either towards the periphery or scattered among the older flowers, as in Acacia, Albizzia. In this type of inflorescence, the main axis does not end in a flower, but it grows continuously and develops flowers on its lateral sides in acropetal succession (i.e the lower or outer flowers are older than the upper or inner ones). Raceme. In this inflorescence, a whorl of bracts forming an involucre is always present, and each individual flower develops from the axil of a bract. Type. It has an elongated spike possessing unisexual and apetalous flowers. Example- Dahila, Cosmos, Zinnia, Tagetes, Aster. Sometimes, the umbel is unbranched and known as a simple umbel. In this type of inflorescence, the flower is the terminating point of each floral axis. (b) Helicoid Cyme: Successive daughter axes are developed on the same side, either right or left, forming a spiral, e.g., in Begonia and some Solanaceae. It has two types of florets – ray florets at the peripheral and disc florets in the centre. The different types of the racemose inflorescence are: Raceme- Flowers with pedicel and are in an acropetal arrangement. 3) Hypanthium In this type of inflorescence, you can see the peduncle modified in narrow cup-like structure. It is small and a few-flowered spike which is covered by two scales called glumes. The florets are crowded on the upper surface of the receptacle and while the inflorescence looks like a single flower. Examples: Mangifera indica (mango), Azadirachta indica (neem), Delonix regia (Gulmohar), etc. Flowers are the most beautiful parts of plants. Achyranthes. It bears small, sessile flowers or florets over its upper surface in centripetal fashion with younger towards the centre and older towards the periphery. Simple cyme (solitary): Determinate inflorescence consists of a single flower. Central axis stops growing and ends in a flower, further growth is by means of axillary buds. Examples: Simple umbel: Centella asiatica (Brahmi), Allium cepa (onion), Fatsia japonica (paper plant), Primula veris (cowslip), etc. The sterile region is called the appendix. Your email address will not be published. Spike: The main axis elongated bearing sessile flowers, as in Verbena, Bottle-brash. It is also called Sympodial Cyme, therefore. The arrangement of flowers on a branch system is known as inflorescence.The inflorescence axis bearing the flower is known as peduncle and the stalk of individual flower is called pedicel. Inflorescence is divided into two main types: Racemose: In racemose types of inflorescence, the main axis grows continuously and flowers are present laterally on the floral axis.Flowers are present in an acropetal manner An inflorescence may either be of racemose or cymose types. and overview is provided to identify the type of Racemose Inflorescence. Inflorescence, in a flowering plant, a cluster of flowers on a branch or a system of branches. Some examples of capitulum inflorescences are marigolds, sunflowers, dahlia and other plants from the sunflower family. Racemose Inflorescence: In this type of inflorescence the axis continues its growth until the last e … Capitulum can be tubular homogamous (example- Ageratum), ligulate homogamous (example- Sonchus) or heterogamous having tubular flowers on the central platform and ligulate flowers on the periphery (example- Sunflower). 1. In such cases, the arrangement of flowers is Centripetal, i.e., the oldest flowers towards the periphery and the youngest ones towards the Centre. Spikelet is basic inflorescence in the grass family Poaceae. Enter your email address to subscribe to this blog and receive notifications of new posts by email. The inflorescence is a modified form of a flower but looks like a bunch of flowers. Your email address will not be published. The flower is surrounded at its base by an involucre. Inflorescence Types With Diagrams & Examples. Cymose Inflorescence. Therefore, these are termed as special inflorescences. Compound Spike: Also known as spike of spikelets.Branches of the main axis bear spike inflorescence. E.g. (examples: Citrus- Orange, lemon, lime, grapefruit) Hesperidium. 1 ; had that yu gave me that thumbs up friend. Umbel inflorescence is the basic inflorescence of coriander family Apiaceae or Umbelliferae. Florets are of two types, tubular and ligulate. Example: Hawthorn. If the main axis of the inflorescence is branched and the branches bear flowers in the same manner as are present on the main axis, the inflorescence is called a compound Inflorescence. A kind of compound inflorescence is the double inflorescence, in which the basic structure is repeated in the place of single florets. (a) Scorpioid cyme: successive daughter axes develop on right and left alternately, forming a zigzag, as in Freesia. A2. Spike with one or few flowers called florets. The whole inflorescence is covered by one or more whorls of involucre or bracts. Table Showing Types of Racemose Inflorescence. Example- Echinops. An inflorescence is actually a closely branching in most plants the flowers are borne in groups but in some, they occur singly and are called Solitary. hope my answer helped yu . Simple racemose inflorescence is of following types. 1. Old flowers present at apex and young flowers at base. Capitate – This type of racemose inflorescence has a globose structure. RACEMOSE INFLORESCENCE. Your email address will not be published. In this, the axes are extremely reduced and the perianth leaves are completely suppressed. Various types of compound inflorescences met within angiosperms are: In some inflorescences, the daughter axes are extremely reduced and are crowded in many groups. The arrangement axis is termed an inflorescence. e.g., Amaranthus viridis, Amaranthus spinosus The young flowers are present in the center of the receptacle while the older ones toward the periphery. Structure of chlorophyll With Formula & Meaning, Definition, Vaccination and Immunization with Uses and Misuses of Antibiotics, What is the Structure of cytoplasm in a cell and Its Function, Difference between Adaptation and Mitigation, factors affecting imbibition with Rate and Extent, Photorespiration Importance with Functions of Rubisco. The inflorescence may also be Terminal when the vegetative axis is continued into the main axis of the inflorescence, or Lateral, when it arises away from the apex, as is Sweet Pea. 5 ; 10 photographs of cymose and recemose inflorencewith examples. July 1, 2020 May 9, 2016 by Ranga.nr. In aroids the spathe is single. This type of inflorescence is characteristic of the composite. What are Mountain And Decompression Sickness? Explain the term Species and describe various concepts of Species? The inflorescence may be Simple, Compound, Mixed, or Of Special Types. Racemose is a type of inflorescence in which the main … The receptacle is surrounded at the base by overlapping bracts which form an Involucre. HII friend Examples of racemose inflorescence are epilobium and black cohosh and Examples of flowers having cymose inflorescence are canna and gladiolus. In this type, the growth of the main axis is indefinite, as the terminal bud does not flower. It may be branched or unbranched. It is characteristic of Umbelliferae. Cymose Inflorescence may be Uniparous, Biparous, or Multiparous. The old flowers at the lower levels on the axis have longer pedicles than the upper ones so that all the flowers reach more or less to the same level. There are three main types of inflorescence – racemose, cymose, and special type. Racemose Inflorescence: In this type of inflorescence the main axis does not end in a flower, but it grows continuously and develops flowers on its lateral sides in acropetal succession (i.e., the lower or outer flowers are older than the upper or inner ones). (example: strawberry, raspberry, blackberry, magnolia) Aggregate . For example, nearly all members of the carrot family (Apiaceae) have compound umbels. A spike is an unbranched, indeterminate inflorescence, similar to a raceme, but bearing sessile flowers (sessile flowers are attached directly, without stalks). In both cases, the basal portions of the successive daughter axes become straightened up, to form a false central axis or Sympodium. The simple inflorescence is of two types according to its mode of branching. The former whorl of bracts is called involucre and the latter involucel. All members of the sunflower family (Asteraceae) have heads, including chrysanthemums, zinnias, marigolds, and dandelions. Both the spathe and the appendix are bent to appear like the head of a snake. Example- Coriander (Coriandrum Sativum), Fennel, Carrot. In Compound Capitulum, many daughter capitula arise from a flattened receptacle of mother capitulum. This type is also called indefinite or indeterminate or botryose inflorescence. Essential and Non-essential Parts of the Flowers, Asexual Reproduction- Types, Characteristics And Significance, Must-Read General Studies Booklist for UPSC IAS Prelims, Must-Read General Studies Booklist for UPSC IAS Prelims in Hindi, Must-Read General Studies Booklist for UPSC IAS Mains, Must-Read General Studies Booklist for UPSC IAS Mains in Hindi, UPSC Topper 2013 Gaurav Agrawal Notes For IAS Preparation, India Fights Back COVID-19: Role of Vitamin D, Differences Between Red And White Muscle Fibres, Ecological Balance Of Organisms In A Habitat. The main types of inflorescence are : 1. mustard, radish, goldmohur etc. it again possess various sub-types. In a cymose inflorescence, the flowers usually form Clusters. Racemose Inflorescence. Generally, the umbel is branched and is known as umbel of umbels (Compound Umbel), and the branches bear flowers. Two examples of racemose inflorescence: 1) Raceme Here pedicellate flowers are present on peduncle. The various forms of racemose inflorescence may be described under three heads. The elongated main axis bears sessile bisexual flowers in an acropetal manner. Old flowers are at the base and younger flowers and buds are towards the apex. Example- Bottle Brush (Callistemon), Latjira (Achyranthes Aspera), Adhatoda, Spinach, Amaranthus. In determinate (cymose) Main axis, which is elongated, bears stalked flowers. Racemose or Indefinite or Indeterminate Type of Inflorescence: ADVERTISEMENTS: The arrangement in which the youngest flower is present near the apex and older towards the base, i.e., in acropetal succession. In Cobra Plant the male and female flowers are formed in separate spadices. Example- Dog Flower (Antirrhinum), Radish (Raphanus Sativus), Turnip, Dwarf Gulmohar (Caesalpinia), Mustard (Brassica Campestris), Larkspur. Racemose inflorescence: In this type of inflorescence, the main axis is unlimited in growth, branched or unbranched. They are as follows-. Example- Oak (Quercus), Mulberry (Morus), Willow (Salix), Betula (Birch), Poplar (Populus). The flowers are arranged in groups or clusters, each of which is really a scorpioid cyme in which the main axis and the successive daughter axes have been reduced and the flowers are almost sessile. The capitulum may be homogamous, if all flowers are of the same kind, as in Sonchus, in which the flowers are ligulate (strap-shaped) and bisexual, or heterogamous, in which the flowers are of two types, as in sunflower, the Disc-Florets, tubular and bisexual, occupying the center of the receptacle and the ray florets, ligulate and pistillate or neuter, present at the periphery of the receptacle. Dianthus: It shows Dichasial cymose inflorescence in which the main axis gives a flower at tip and creates two branches simultaneously. In this inflorescence, the primary axis remains comparatively short, and it bears at its tip a group of flowers which possess pedicels or stalks of more or less equal lengths so that the flowers are seen to spread out from a common point. Here you can find important and main points regarding General Knowledge which is very useful for you to compete in any exam like SSC, UPSC, and other State Level PSC exam. Required fields are marked *. Some examples of racemose inflorescence: indeterminate inflorescence and Photorespiration, difference Between Respiration and Photorespiration, difference Respiration! Example: pineapple, mulberry, ear of corn ) Multiple bunch of flowers having cymose inflorescence, a... On a long stalk, State the role of Sun in the lower half cover. Enter your email address to subscribe to this blog and receive notifications of new posts by email and.!, Raphanus ( Radish ), Azadirachta indica ) where spike is discussed: inflorescence: types of inflorescence the. 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