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Flower - GK Notes PDF

GK on Flowers – [Notes PDF]


Important Points on Flower

A flower is the most important part of plants. It is the way of the reproductive system of plants. Flower General Knowledge notes for competitive examinations such as SSC, CGL, MTS, IAS, UPSC, Railway, Banking, Defence, Police, Group-D, Postal assistant, CDS, WBCS, and more.

What is the flower?

Bloom or flower is a particular shoot wherein the leaves are altered into the flower structures.

A stalk is a part of a flower that supper the whole flower. Receptacles thalamus is part by which the modified leaves are attached to it.

# There are four-part of a flower which are Calyx, Corolla, Androecium, and Gynoecium.

The first whorl is the green sepals, collectively known as the calyx

The second whorl is the large brightly colored petals collectively known as the corolla.

The third whorl which is the male piece of blossom is the long string-like anticipating out and each generally finishing in a bilobed tip. These are called stamens and collectively known as androecium.

The fourth whorl which is the female part of a flower is known as gynecium.

Parts of flower gk

Complete Flower: If the four parts mentioned above are present in a flower then it is called a complete flower.

Incomplete Flower: An incomplete flower is that in which one or more sets of floral structures are missing.

The Essential or reproductive parts of a flower consist of stamen which is the male part and the carpels the female part.

The Non-essential or accessory parts of a flower consist of sepals and petals and those which protect the essential part.

Bracts: When a flower born it has a leaf-like structure which is called Bracts. Initially, it is green in color and as the flower starts to grow, it becomes colorful.

Nectaries: Nectar is the liquid present in a flower that produces a sweet smell. Generally, it is located inside and bottom of a flower i.e on the base of petals.

Parts of flower gk

In accordance with the sexual behavior there are four types of flowers, they are –

  • Bisexual fower: Include both stamens and carpels.
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  • Unisexual Flower: Inclouded only stamens or carpels.
  • Staminate or Male flower: Included only stamens.
  • Pistillate or Female flower: Included only carpels.
  • Neuter Flower: Does not included male or female productive systems.

Properties of the Floral Parts

The properties of four floral parts are mentioned below.


  • In general, Calyx is green in color and perform photosynthesis.
  • Generally, there are four or five sepals, protect the newborn young or soft part of bud by covering it.
  • For some flowers, it may be color, for example, it is red for Gul Mohor flower also known as a flame of the forest.


  • It is also known as petals.
  • Usually arranged in single, double or spiral whore.
  • It may be free polypetalous or united gamopetalous forming a tube.
  • Their main function is to attract insects for pollination.


  • It is made from stamens.
  • The number (few to large numbers) of stamens is different for different flowers.
  • Each stamen consists of filament and anther.
  • Anther included two-lobed.
  • Each lobe consists of two pollen sacs.
  • Polen sac contains pollen grains.

For Monadelphous, stamens are integrated by a single group with their filaments. In the case of Diadelphous, the filaments are integrated into two groups. For Polyadelphous, the filaments are integrated by several groups.


  • It is the central part of a flower.
  • It is made up of several fused carpels.
  • It is also known as Pistil (one or more pistil).
  • There are three major parts of carpels, Stigma, Style, and Ovary.

Monoecopis plants are those in which male and female flowers both grow in the same plant.

Dioecious plants those in which male and female flowers grow in the different plants.

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Hi, I am SOM, a State Added (WB) Lecturer in Physics at a College, Part-time blogger, and founder of, started blogging since 2015 and still learning.