Native to Europe.
Occurrence: An occasional garden escape.
Family: Amaryllidaceae, formerly it was classified as a lily.
Identification:
Similar species. Angled Onion (Allium triquetrum) also has white nodding flowers. Its petals have a green stripe, and the flower stalks are triangular in cross section.
Photo: Snowflake in flower showing the distinctive green spots. Castlemaine.