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DIFFERENCE BETWEEN DISC FLORET AND RAY FLORET

The inflorescence of flowers belonging to Family Asteraceae (Compositaceae) is called a floret. It is seen in Helianthus annus (Sunflower).

Disc floret:

  1. Located in the centre of head, bracteate, actinomorphic. bisexual, tubular, pentamerous.
  2. Calyx: Absent or pappus
  3. Corolla: Five petals, gamopetalous, tubular
  4. Androecium: Five stamens, epipetalous, syngenesious, filaments free.
  5. Gynoecium: Bicarpellary, syncarpous, unilocular, inferior ovary, basal placentation, bifid stigma

Ray floret:

  1. Located towards the periphery of head, bracteate, sessile, zygomorphic, ligulate.
  2. Calyx: Absent or hairy pappus, persistent
  3. Corolla: Five petals, gamopetalous
  4. Androecium: Absent
  5. Gynoecium: Bicarpellary, syncarpous, unilocular, inferior ovary, basal placentation, stigma branched. 
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