Le pappus du pissenlit

« Un pappus, ou une aigrette, est une petite touffe ou un faisceau de poils ou de soies qui équipent certains akènes afin de permettre une dispersion optimale par le vent. » [Source : http://fr.wikipedia.org/wiki/Pappus_%28botanique%29]

At http://en.wikipedia.org/wiki/Pappus_%28flower_structure%29, I see: “The pappus is the modified calyx, the part of an individual disk, ray or ligule floret surrounding the base of the corolla, in flower heads of the plant family Asteraceae. The pappus may be composed of bristles (sometimes feathery), awns, scales, or may be absent. In some species, the pappus is too small to see without magnification. In some species, such as Dandelion or Eupatorium, feathery bristles of the pappus function as a "parachute" which enables the seed to be carried by the wind. The name derives from the Ancient Greek word pappos, Latin pappus, meaning “old man”, so used for a plant (assumed to be an Erigeron species) having bristles and also for the woolly, hairy seed of certain plants.”