Gillyweed

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Across
  1. 2. the study of plants and herbs.
  2. 5. a drink with gillyweed in it.
  3. 6. a person who gave Harry Potter gillywater with Love Potion in it.
Down
  1. 1. the task where Harry used ingested gillyweed.
  2. 3. magical beasts that live underwater.
  3. 4. a magical plant that allows a human to breathe underwater.