Question

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What Is inflorescence? Explain its different types? What Is the significance of the Inflorescence?
Carries 3 marks
Class 11 CBSE

Answer 1

INFLORESCENCE

An inflorescence is a group or cluster of flowers arranged on a stem that is composed of a main branch or a complicated arrangement of branches. Morphologically, it is the modified part of shoot of seed plants where flowers are formed.

TYPES OF INFLORESCENCE

Based On the growth and development of penduncle, inflorescence are classified into three types:

(1) Racemose inflorescence.

(2) Cymose inflorescence.

(3) Special inflorescence.

STRUCTURE

Inflorescence are complex structures with many functions. At anthesis they present the flowers in ways that allow for the transfer of pollen and optimisation of the plants reproductive success. During flower and fruit development they provide nutrients to the developing flowers and fruits.

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Answer 2

The term Inflorescence is the arrangement of flowers on the floral axis The flowers are arranged with respect to a fixed floral axis.

# Types of inflorescence are :-

1) racemose : this is further divided into

a) raceme

b) catkin

c) spike

d) spadix

e) corymb

f) umbel

g) head or captulum

2) cymose : it is further divided into

a) monochasial cyme

b) dichasial cyme

c) polychasial cyme

various types of recemose inflorescence :

✓ typical racemose : it is characterized by elongated axis bearing stalked flowers laterally

in an acropetal man older flowers are lower while anger flowers are above

eg: glomar ,larkspur

✓ corymb : the flowers having wearing length of pedicels but come to same level

eg: cauliflower and candituft

✓ spike : it is type of recemose the flowers are sessile that is have no stalk

eg: grasses

✓ umbel : the main axis is short and all the flowers arise from the same point of appearing like an umbrella

eg: coriander