Galanthus, commonly known as Snowdrop, is a genus of about 20 species Snowdrop is a small genus of approximately 20 species of bulbous perennial herbaceous plants. The small flowers are composed of six white tepals (undifferentiated petals and sepals); the three outer tepals are long and curved, and the inner tepals are small and notched. They are commonly the earliest garden flowers to blossom in the late winter or early spring, sometimes emerging when snow is still on the ground.