knapbottle en · NOUN
Meanings
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(uncountable) Bladder campion.
It is accounted a kinde of Lychnis by most of the best Herbalists, and therefore Bauhinum nameth it Lychnis Sylvestrus que Ben Album vulgo: some with us call it Knapbottle, and others Spatting or Frothy Poppy.
1640, John Parkinson, Theatrum Botanicum: The Theater of Plants: