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