Either of two eastern North American annual plants(Pilea pumila or P. fontana) having short,drooping clusters of tiny greenish-white flowers and translucent stems and leaves.

 
  • 北美冷水花,美豆两种北美东部一年生植物中的一种(水冷花属北美水冷花或水冷花),有短且下垂的花簇,开白色杂淡绿的小花,茎和叶透明。
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