Tulips (Tulipa) are a genus of spring-blooming perennial herbaceous bulbiferous geophytes. The flowers are usually large, showy and brightly coloured, generally red, pink, yellow, or white. They often have a different coloured blotch at the base of the tepals, internally. Because of a degree of variability within the populations, and a long history of cultivation, classification has been complex and controversial. The tulip is a member of the lily family, Liliaceae, along with 14 other genera, where it is most closely related to Amana, Erythronium and Gagea in the tribe Lilieae.