Leucojum aestiuum ‘Gravetye Giant’ Amaryllidaceae Wayne Roderick, Orinda Leucojum aestiuum ‘Gravetye Giant’ Amaryllidaceae Wayne Roderick, Orinda Native to Europe and Southwest Asia, summer snowflakes actually bloom here in late winter and are attractive bulbs for slowly naturalizing on cool slopes or in winter-wet edges of shrubs or trees. They have strap shaped leaves and nodding, bell-shaped white flowers with a green spot below each petal tip. This particular variety has larger flowers. . Photo by Bruce Peters