Plants like Sunflower (Helianthus annuus) and Marigold (Tagetes spp.) belong to the family Asteraceae (also known as Compositae). Their characteristic flower structure is a capitulum or head, which is a type of inflorescence. What appears to be a single flower is actually a composite structure made up of many smaller individual flowers called florets. The outer, colourful "petals" are typically ray florets, while the central part consists of numerous disc florets.
The colourful part of the Sunflower or Marigold plant is
Asked in UPSC NDA 1 2017 · Topic: Plant Reproduction (Structure of a Flower and its Parts)
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