Note on Flower

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Plants grow all around us. They are seen around our homes, schools, on the roadsides and fields. The majority of the plants that we see around us, bear flowers and reproduce by seeds. Hence, they are called flowering plants. These plants show great diversity in shape, size, habitat and structure. These plants are reproduced from their seeds. The parts of a flowering plant is given below:

  1. Calyx: It is the outermost whorl. Each member of the whorl is called sepal. They are mostly green in color. Calyx protects the flower when it is still a bud and helps in the photosynthesis process.
  2. Corolla: It is the next inner whorl of the flower. Each member of this whorl is called petal. Corolla has bright colors. In some flower, corolla has a kind of glands which secrete sweet juice. Rose flower has the sweet smell. Corolla attracts insects that help in pollination.
  3. Androecium: It is the third inner whorl of the flower, it is male reproductive whorl. Each member of this whorl is called stamen. Each stamen has upper lobe like anther and slender stalk called filament. Anther possesses numerous pollen grains which are male gametes. The anther has lobed sac which contains a mass of powder or dust grains called pollen grains. Each pollen grain has two sex cells which take part in reproduction.
  4. Gynoecium: This is the fourth inner whorl and is the female part of the flower. It is the single tube like swollen at its base and is made up of two carpels (female reproductive organs) fused together. It consists of 3 parts- stigma, style, and ovary. The short neck like part is called the style and longer wider lowermost part is called the ovary. The ovary has two chambers, each containing a number of ovules, the female reproductive unit.Each ovule has a special cell called female sex cell (egg cell or ovum) which takes part in reproduction.

Flower containing calyx, corolla, androecium and gynoecium is called complete and those lacking any one or more such part is called incomplete flower.

Difference between sepal and petals

S.N Sepal Petal
1. It is the green colored flower. It is the brightly colored structure next to sepal.

2.

A group of the sepal is called calyx.

A group of petal is called corolla.
3.

It helps in protection of flower in bud stage.

It helps in pollination by attracting insects.
Differences between stamen and carpel
S.N Stamen Carpel
1. It is the male part of the flower.It is the female part of the flower. It is the female part of the flower.
2. It consists of three parts (a) filament (b) anther lobes (c) connective. It consists of three parts (a) stigma (b) style (c) ovary.
3. It produces grains. It receives pollen grain, produces fruit and seeds.

  • The majority of the plants that we see around us, bear flowers and reproduce by seeds. Hence, they are called flowering plants. 
  •  Calyx protects the flower when it is still a bud and helps in the photosynthesis process.
  • Corolla attracts insects that help in pollination.
  • The anther has a lobed sac which contains a mass of powdery or dust grains called pollen grains.
  • The ovary has two chambers, each containing a number of ovules, the female reproductive unit.
  • Flower containing calyx, corolla, androecium and gynoecium is called complete and those lacking any one or more such part is called incomplete flower.
.

Very Short Questions

An androecium is called the male reproductive organ of flower because it produces male reproductive cell called pollen grain.

Those flowers which have only stamen are called staminate flower. It doesn’t contain pistil. It is also called male reproductive flower. Similarly, those flower which have only pistil are called pistillate flower. It doesn’t contain stamen it is also called female reproductive flower.

Those plants which bear flowers and reproduce by seeds are called flowering plants.

The first and outermost whorl of the flower is called calyx.

Calyx protects flower in its bud stage and also helps in its photosynthesis process.

The gynoecium consists of three parts. They are stigma, style and ovary.

Corolla attracts insects that help in pollination.

The difference between sepal and petal are:

S.N Sepal Petal
1. It is the green colored flower. It is the brightly colored structure next to the sepal.
2. A group of the sepals are called calyx. A group of petals are called corolla.
3. It helps to protect flower in bud stage and also helps in photosynthesis. It helps to attract insects and thus helps in pollination.

The difference between stamen and carpel are:

S.N Stamen Carpel
1. It is the male part of the flower.It is the female part of the flower. It is the female part of the flower.
2. It consists of three parts (a) filament (b) anther lobes (c) connective. It consists of three parts (a) stigma (b) style (c) ovary.
3. It produces grains. It receives pollen grain, produces fruit and seeds.

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  • The male part of a flower is called ______.

    petals


    gynoecium


    androecium


    tepals


  • The male gamete of a plant is called ______.

    petals


    androecium


    pollen grain


    gynoecium


  • Which of the following is not a part of androecium?

    filament


    connective


    anther lobe


    stigma


  • Which one of the following is not the part of a gynoecium?

    style
    stamen
    ovary
    stigma
  • A group of sepal is called ______.

    Carpel


    corolla


    Stamen


    calyx


  • ______ is the male part of the flower.

    Gynoecium


    Stamen


    Carpel


    Sepal


  • Which of the following is the part of a flower?

    calyx


    petals


    sepals


    all of the answers are right


  • The reproductive part of a plant is called a ______.

    leaf


    shoot


    root


    flower


  • The bottom part of a flower is called _______.

    tepals


    thalamus


    sepals


    petals


  • The individual element of a calyx is called ______.

    androecium


    tepals


    sepal


    petals


  • The individual element of a corolla is called

    sepal
    androecium
    petals
    tepals
  • The individual element of a androecium is called

    tepals
    sepal
    petals
    stamen
  • The individual element of a gynoecium is called

    carpel
    tepals
    petals
    sepal
  • The female part of a flower is called:

    sepal
    gynoecium
    tepals
    petals
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