apple of Peru

n.
An annual Peruvian plant (Nicandra physalodes), grown as an ornamental for its pale violet-blue, bell-shaped flowers and its fruits enclosed in papery inflated calyxes. Also called shoo-fly plant.

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The noun has 2 meanings:

Meaning #1: coarse South American herb grown for its blue-and-white flowers followed by a bladderlike fruit enclosing a dry berry
  Synonyms: shoo fly, Nicandra physaloides

Meaning #2: intensely poisonous tall coarse annual tropical weed having rank-smelling foliage, large white or violet trumpet-shaped flowers and prickly fruits
  Synonyms: jimsonweed, jimson weed, Jamestown weed, common thorn apple, Datura stramonium

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