 The flowers themselves are white, with purple or reddish veins along the tepals.In Great Britain, "G. serotina" is an ice age relict, only found on a few inaccessible sites in Snowdonia National Park, Cwm Idwal being one such site, and seems to have developed in isolation since the glacial period.Although the total Welsh population may number fewer than 100 bulbs, the Welsh plants are genetically distinct from other populations of the same species, and are more diverse than those found in the Alps.