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Asteraceae or Compositae (commonly referred to as the aster, daisy, composite,or sunflower family) is an exceedingly large and widespread family of flowering plants (Angiospermae). The family has more than 23,600 currently accepted species, spread across 1,620 genera (list) and 13 subfamilies.
In many plants of the family Asteraceae, what appears to be a single flower is actually a cluster of much smaller flowers.