Any of numerous plants of the genus Urtica, having toothed leaves, unisexual apetalous flowers, and stinging hairs that cause skin irritation on contact.

 
  • 荨麻:科类植物荨麻属齿形叶,花雌雄异体,无花瓣,接触其植物刺毛会引起皮肤过敏
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