Flower

Flower:

The flower is a highly modified shoot meant essentially for the sexual reproduction of the plant.

Parts of a typical flower

  1. A flower is generally borne on the lateral side of the peduncle at node in the axil of leaf like structure called bract.
  2. A flower ariing in the axil of a bract is called bracteates and if the bract is absent at the base of a flower the flower is said to be ebracteate.
  3. The stalk of the flower is called pedicel, which exposes the flower in favourable position for pollination and the flower is called as pedicellate. If the pedicel is absent the flower is sessile.
  4. There is very short pedicel present in the flower, such flower is described as sub-sessile.
  5. Two small leaf like structure are also present on the flower pedicel called bracteoles.
  6. The pedicel has an upper swollen portion called thalamus or torus.
  7. Bears four types of floral leaves arranged in successive whorls the sepals, petals, stamens and carpels or collectively these whorls are called calyx, corolla, androecium and gynoecium

General Characteristics of Flower

Flower :

  1. It is a modified branch which is usually brightly coloured.
  2. The stalk of flower is called pedicel.
  3. Swollen flat tip of pedicel forms the thalamus.
  4. The four types floral, leaves, sepals, petals, stamens and carpels appear.
  5. Thalamus, Stamens and Carpels constitute the essential parts of a flower.
  6. Non-essential parts are sepals and petals.
  7. The sepals are usually green and petals are coloured and showy.
  8. Each stamen consists of a stalk like filament and flattened globoid top called anther.
  9. The anthers produce the pollen grains. Carpels shows basal swollen ovary, middle elongated style and upper terminal stigma.

 

Related Keywords
11    PMT    Biology    Morphology of Flowering Plants    Flower