Free Biology Dictionary

Video Example : Carnivores



  • Sepals
  • Tepals
  • Corolla
  • Zygomorphic flower
  • Actinomorphic flower

Definition of Petals

Colourful modified leaves of the flower.

More About Petals

  • They are the most prominent, bright and colourful part of the flower
  • They constitute the whorl next to the calyx, the outermost whorl of the flower
  • All the petals are collectively form a ‘corolla’ of the flower
  • They are present next to the sepals
  • The colour and shape of the petal varies differently according to the plant species
  • They may be pink, red, yellow, purple, orange or a combination of any of the colours together
  • The colour of the petals helps to attract the birds, bees and other insects that help for pollination
  • The number of petals of a flower also varies from 3, 4, 5 or multiples of them
  • The number of petals is important characteristics for the plant classification.
  • If all the petals are similar in the size and shape, the flower is known as regular or actinomorphic flower.
  • If the flowers are symmetrical in only one plane, then they are said to be irregular or zygomorphic.
  • In some plants the sepals and the petals of the flowers cannot be distinguished as they have the same colour and shape. For example Tulips.
  • Such flowers are known to have tepals, instead of sepals and petals.

Questions based on petals:

1) To which whorl of the flower do the petals include?

    a) Calyx
    b) Corolla
    c) Androcoeium
    d) Gynoecium

Solution: (b) The petals are the units of corolla, a whorl inner next to calyx

2) Which among the following is the most bright and colourful part of the flower?

    a) Pollen
    b) Sepals
    c) Petals
    d) Calyx

Solution: (c) The petals are the most bright and colourful part of flower