The peduncle is thick and fleshy which bears unisexual flowers except in the apical region. Difference Between Respiration and Photorespiration, Difference Between Respiration And Combustion. The main axis of a racemose inflorescence is sometimes may be compressed and flattened into a disc, bearing a cluster of flowers on its upper surface. The main axis is shortened, broad and flat. Umbel inflorescence is the basic inflorescence of coriander family Apiaceae or Umbelliferae. Example- Coriander (Coriandrum Sativum), Fennel, Carrot. It may be terminal or axillary. In other terms, it is considered as an advanced form of a flower in the evolution. Two examples of racemose inflorescence: The inflorescence may be Simple, Compound, Mixed, or Of Special Types. E.g Delphinium (Larkspur, Raphanus (Radish), Mustard. Enter your email address to subscribe to this blog and receive notifications of new posts by email. 2. 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. 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. All members of the arum family (Araceae) have a spadix inflorescence. Racemose Inflorescence: In this type of inflorescence the axis continues its growth until the last e … Like raceme, but flowers are sessile or unstalked. Inflorescence: An axis bearing a cluster of flower is called an inflorescence. The various forms of racemose inflorescence may be described under three heads. Capitate – This type of racemose inflorescence has a globose structure. Typical examples, are—Ocimum, Coleus, Mentha, Leucas, etc. The receptacle is surrounded at the base by overlapping bracts which form an Involucre. (example: pineapple, mulberry, ear of corn) Multiple. Your email address will not be published. The various forms of racemose inflorescence may be described under three heads. It has an elongated spike possessing unisexual and apetalous flowers. The flowers are sessile, generally male towards the upper side, female towards the lower side and downwardly pointed hair or neuter flowers in the middle. Spike. The type of inflorescence is characteristic of Lamiaceae (Labiatae) family. Example- Oak (Quercus), Mulberry (Morus), Willow (Salix), Betula (Birch), Poplar (Populus). The flowers are small and are known as Florets. Inflorescence can be broadly classified based on the following: Number and position of flowers Sequence of flower development The nature of inflorescence branching However, the common classifications of inflorescence are Racemose and cymose. Inflorescence Types,cymose and racemose types,examples with Diagrams 1. Example- Candytuft (Iberis Amara), Cassia Sophera. Inside the involucre, surrounding the stalk. The young flowers are either towards the periphery or scattered among the older flowers, as in Acacia, Albizzia. it again possess various sub-types. There are three main types of inflorescence – racemose, cymose, and special type. RACEMOSE INFLORESCENCE. Some examples of capitulum inflorescences are marigolds, sunflowers, dahlia and other plants from the sunflower family. The main axis may be elongated, shortened, or flattened into a Therefore the classification of Racemose Inflorescence is based on the Development of the main axis and pedicels of the flowers. 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. When branching of the main axis or peduncle is either racemose or cymose, the inflorescence is known as Simple. Spikelet. A racemose inflorescence is one whose rachis (simple or branched) never ends in a flower and it conti nues to elongate by means of a persistent growing point. Capitulum inflorescence is a typical inflorescence of family Asteraceae or Compositae. (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. Simple cyme (solitary): Determinate inflorescence consists of a single flower. 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. In Cobra Plant the male and female flowers are formed in separate spadices. It is also called Sympodial Cyme, therefore. Inflorescence Types With Diagrams & Examples. This type of inflorescence is characteristic of the composite. Racemose is a type of inflorescence in which the main … Notify me of follow-up comments by email. E.g. What are Mountain And Decompression Sickness? Inflorescence. Main axis, which is elongated, bears stalked flowers. Inflorescence, in a flowering plant, a cluster of flowers on a branch or a system of branches. In aroids the spathe is single. It has two types of florets – ray florets at the peripheral and disc florets in the centre. Cymose inflorescence. Fruit from many carpels on a single flower. 1. At the base of the cup, the female flowers develop while towards mouth the male flower develops. Flesh mostly of receptacle tissue; leathery ovarian wall; inferior ovary. In this type, the growth of the main axis is indefinite, as the terminal bud does not flower. Sometimes, the umbel is unbranched and known as a simple umbel. Examples: Simple umbel: Centella asiatica (Brahmi), Allium cepa (onion), Fatsia japonica (paper plant), Primula veris (cowslip), etc. There are basically two types of inflorescences. It forms a tube in the lower half to cover and protect the flowers. Example- Bottle Brush (Callistemon), Latjira (Achyranthes Aspera), Adhatoda, Spinach, Amaranthus. It bears small, sessile flowers or florets over its upper surface in centripetal fashion with younger towards the centre and older towards the periphery. Example- Echinops. 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). Table showing types of racemose inflorescence. Example- Dog Flower (Antirrhinum), Radish (Raphanus Sativus), Turnip, Dwarf Gulmohar (Caesalpinia), Mustard (Brassica Campestris), Larkspur. Save my name, email, and website in this browser for the next time I comment. For example, nearly all members of the carrot family (Apiaceae) have compound umbels. HII friend Examples of racemose inflorescence are epilobium and black cohosh and Examples of flowers having cymose inflorescence are canna and gladiolus. With the main axis shortened- … 1. The simple inflorescence is of two types according to its mode of branching. Two examples of cymose inflorescence : Calotropis: It shows Polychasial cymose inflorescence in which the main axis terminates in flower and at the same time it creates a number of lateral flowers around. It is coloured in aroids. There is an arrangement of flowers in them is centrifugal i.e., the young flowers are towards the periphery and the older ones towards the center. Example- Dahila, Cosmos, Zinnia, Tagetes, Aster. The florets are crowded on the upper surface of the receptacle and while the inflorescence looks like a single flower. Spikelet is basic inflorescence in the grass family Poaceae. 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). In determinate (cymose) The arrangement axis is termed an inflorescence. Spike with one or few flowers called florets. It is characteristic of Umbelliferae. A kind of compound inflorescence is the double inflorescence, in which the basic structure is repeated in the place of single florets. 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. An inflorescence may either be of racemose or cymose types. It never terminates into a flower and bears flowers in acropetal (growing upward from the base or point of attachment) The main types of racemose inflorescence are: Raceme: The main elongated axis bears stalked flowers. In a cymose inflorescence, the flowers usually form Clusters. In this type of inflorescence, the flower is the terminating point of each floral axis. [Agrilearner] Type 6. Example- Colocasia, Cobra Plant (Arisaema). Your email address will not be published. e.g., Amaranthus viridis, Amaranthus spinosus Old flowers present at apex and young flowers at base. Racemose 3.Mixed 2.Cymose The combination of characteristics of both racemose and cymose types or of two types of racemose. 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. Achyranthes. and overview is provided to identify the type of Racemose Inflorescence. 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