Asarum said: I think it's Star of Bethlehem, or Ornithogalum umbellatum. But if it smells of onions Fairygirl is right!
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I live in west central Scotland - not where that photo is...
https://commons.wikimedia.org/wiki/File:Ornithogalum_umbellatum_12.JPG
Stem is triangular .....see pic.
https://www.uksouthwest.net/wildflowers/amaryllidaceae/allium-triquetrum.html