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wild lily of the valley

noun
  1. a low-growing woodland plant, Maianthemum canadense, of the lily family, native to northeastern North America, having a cluster of small white flowers.
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Origin of wild lily of the valley

An Americanism dating back to 1820–30
Also called Canada mayflower, false lily of the valley.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018