Jonquil is a hue of yellow. It is the color of the interior of the central cylindrical tubular projection of the jonquil flower. The color takes its name from a species of plant, Narcissus jonquilla, which has clusters of small fragrant yellow flowers, and is native to the Mediterranean.

The first known recorded use of jonquil as a color name in English was in 1789.

Kurt Vonnegut uses the word jonquil in his novel The Sirens of Titan, Titan being the largest moon of Saturn.

Narcissus is a genus of predominantly spring perennial plants in the Amaryllidaceae (amaryllis) family. Various common names including daffodil,] daffadowndilly, narcissus, and jonquil are used to describe all or some members of the genus. Narcissus has conspicuous flowers with six petal-like tepals surmounted by a cup- or trumpet-shaped corona. The flowers are generally white or yellow.

Historical accounts suggest narcissi have been cultivated from the earliest times, but became increasingly popular in Europe after the 16th century and by the late 19th century were an important commercial crop centered primarily on the Netherlands. Today narcissi are popular as cut flowers and as ornamental plants in private and public gardens. The long history of breeding has resulted in thousands of different cultivars. For horticultural purposes, narcissi are classified into divisions, covering a wide range of shapes.

More Info: en.m.wikipedia.org