Leucojum

Previously part of the Galanthus genus, but back in the 18th century Linnaeus split them into different genera as leucojum's 6 tepals are of equal length, whereas with galanthus, the 3 inner tepals are shorter. Recently other species have been moved into the genus Acis. Leaving only two species L. aestivum and L. vernum. Both with bell-shaped, pendent white flowers, often with each tepal tipped with a green or yellow spot. Both are called snowflakes, but quirkily, in the UK the summer snowflake (L. aestivum) flowers in spring and the spring snowflake (L. vernum) flowers in winter!