Definition of Sepals

Tiny green leaf like part that secures the flower.

More About Sepals

  • Sepals form an important part in the flowering plants, Angiosperms
  • There are four major whorls of the flower, namely the calyx, corolla, androcieum and gynoecium
  • The sepals are the units of the calyx, which is the outermost whorl of the flower
  • Sepals are more prominent when the flower is in the bud stage, as they protect the bud
  • While blooming or flowering, the petals of the buds become large and open up
  • It is at this time that the sepals provide protection and support the flower from withering
  • After flowering, the sepals are no more required and either becomes vestigial, wither off, or get modified into thorny calyx
  • The sepals are important for the plant classification
  • The number of sepals in a flower varies according to the species
  • The sepals may be united as in hibiscus, tomato, cottonor separate as in Lily, Rose and Jasmine
  • The number of sepal indicated the merosity of the flower
  • The merosity of the monocot flower is three or multiple of three
  • In some plants the sepals and the petals of the flowers cannot be distinguished as they have the same colour and shape.For example in Tulips
  • Such flowersare known to have tepals, instead of sepals and petals

Questions based on sepals:

1) Which among the following forms the units of Calyx?

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

Solution: (c) The sepals form the units of calyx

2) The sepals constitute ____ whorl of the flower from outside to inside

a) outermost
b) 2nd
c) 3rd
d) innermost

Solution: (a) The sepals are units of calyx that form the outermost whorl of the flower