Poisonous plants

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Across
  1. 2. A liquid substance renouned to be a laxative and labor-inducer.
  2. 4. Something you kiss under at Christmas time, instead of mistletoe.
  3. 5. A skirt worn as a costume in a ballet performance.
  4. 7. A yellow native tree.
  5. 8. Opium is harvested from this.
Down
  1. 1. A small furry mammal and something that keeps your hands warm.
  2. 2. Something worn by superheroes and a flower associated with Holland.
  3. 3. You can bake, roast, fry or even turn them into chips.
  4. 6. A fruit made often into a dessert, usually with apple and in a pie or crumble.