Page 48 - Viva ICSE Science 5 : E-book

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Pollination

Flowers are the most attractive part of a KEY CONCEPTS

plant. They produce fruits and seeds. New
• Parts of a fl ower
plants grow from seeds. Thus, fl owers are very • Bisexual and monosexual fl owers

important part, which help in producing new • Pollination
plants.

Did You Know!ow!
Parts of a Flower
Largest fl ower—Raffl esia
Flowers have diff erent shape, size and (grows in Indonesia). It
has a diameter of nearly
colour. But most fl owers contain the parts
1 metre.
as shown in the fi gure. Smallest fl ower—
Duckweed (Wolff ia). It is
only about 0.5 millimetre
in diameter.

anther
stamen
(androecium) fi lament stigma
style carpel
(gynoecium)
petal ovary
(corolla)
sepal (calyx)
ovule
ovule
amus
thalamus
pediceldicel
Parts of a fl ower

Broadly, there are four parts of a fl ower—calyx, corolla, androecium and gynoecium.
These parts are arranged in whorls or a circular pattern.

Calyx

Calyx is the outermost whorl. It consists of small green, leaf-like structures called sepals.

They may be three or more in number. All sepals together are called calyx. They protect
the flower in its bud stage.

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