Multiple choice

The fern associated with stomach cancer in Japan is

  1. Rumohra adiantiformis

  2. Microsorum pteropus

  3. Osmunda regalis

  4. Matteuccia struthiopteris

  5. Pteridium aquilinum
Reveal answer Fill a bubble to check yourself
E Correct answer
Explanation

Its fiddleheads are used as a cooked vegetable in Japan and are believed to be responsible for the high rate of stomach cancer in Japan. It is also one of the world's most important agricultural weeds, especially in the British highlands and often poisons cattle and horses.

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