Different types of inflorescence

Different types of inflorescence

1. WELCOME TO MY PRESENTATION

2. PRESENTED BY SUBROTO PODDER STUDENT ID : AT- 120802

3. Presentation Title INFLORESCENCE

4. INFLORESCENCE The branch system of the floral region bearing a group of flowers is called inflorescence.

5. Types of inflorescence 1.Racemose inflorescence 2.Cymose inflorescence 3.Special types

6. Racemose inflorescence The main axis does not terminate into a flower,but it keeps on growing continually and gives off flowers laterally in acropetal succession.Here the youngest flower is present at the apex and the older flowers towards the base.

7. Different types of racemose inflorescence 1.Raceme:The main axis in this case is elongated and it bears laterally a number of flowers which are all stalked. e.g.Radish 2.Spike:The main axis is elongated and the lower flowers are older,opening earlier than the upper ones.e.g.Amaranth 3.Spikelet:This is a very small spike with one or a few small flowers. e.g.Grass

8. 4.Catkin:This is a spike with a long and pendolous axis which bears unisexual flowers.e.g.Mulberry 5.Spadix:This is a spike with a fleshy axis which is enclosed byone or more large.The spadix is found in monocotyledons only.e.g.Banana 6.Corymb:The main axis is comparatively short and the lower flowers have much longer stalks or pedicels than the upper one.e.g.Candytuft

9. 7.Umbel:The primary axis is shortened and it bears at its tip a group of flowers which have pedicels of more or less equal lengths.e.g.Coriander 8.Capitulum:The main axis or receptacle is suppressed,becoming almost flat and it bears a mass of smaii sessile flowers on its surface with one or more whorls or bracts at the base forming an involucre . e.g.Sunflower

10. Cymose inflorescence The growth of the main axis is checked soon by the development of a flower at the apex and the lateral axis below the terminal flower also ends in a flower and thus its growth is also checked.In cymose inflorescence the terminal flower is the oldest and the younger flowers are present on the lower side.

11. Different types of cymose inflorescence Uniparous:This type of inflorescence the main axis ends in a flower and it produces only one lateral branch at a time ending in a flower. There are two types of uniparous 1.Helicoid e.g.Begonia 2.Scorpioid e.g.Heliotrope

12. Biparous:In this type of inflorescence the main axis ends in a flower and at the same time it produces two lateral younger flowers sessile or stalked.e.g.Jasmine Multiparous:In this kind of cymose inflorescence the main axis as usual ends in a flower and at the same time it again produces a number of lateral flowers around.e.g.Madar

13. Special type Cyathium:A cup shaped involucre containing nectar secreting glands,a centrally placed large female flowers and many male flowers.e.g.Euphorbia Verticulaster:This is a special form of cymose inflorescence.In it there is a cluster of sessile or almost sessile flowers in the axil of a leaf,forming a false whorl at the node.e.g.Leonurus

14. Hypanthadium:The fleshy receptacle forms a hollow cavity with an apical opening guarded by scales and the flowers are borne on the inner wall of the cavity,the inflorescence is hypanthodium.Here the female flowers develop at the base of the cavity and the male flowers higher up towards the apical pore. e.g.Ficus

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