Bulb is a generic term for a range of different types of underground storage organs that include true bulbs, corms, and rhizomes. They come up, do their thing and die back but remember, don't chop off the leaves!
Galanthus nivalis
Common snowdrop
Bulb
Hardy
White
Grey-green
10cm to 15cm x 5cm to 7.5cm (4in to 6in x 2in to 3in)
The harbingers of spring. Snowdrops have graceful hanging flowers that appear on a slender stem. The three large outer petals and three smaller inner ones form an upside down cup that is marked with green.