ASTER. ASTER Close_up of an aster. Oise, Picardy, France. Among the plants of the Asteraceae family or Composeae, what we take for a unique flower is in fact a clutch of small flowers aggregated into an inflorescence named capitulum and mimant a flower. The small flowers constituting the capitulum can be of two types : flowers with a tongue liguled flowers or half_disk flowers or tubular flowers disk flowers. Depending on the species, the capitulum can be composed only of liguled flowers dandeli