What is "jonquille"

Jonquil \Jon"quil\, Jonquille \Jon"quille\, n. [F. jonquille, fr. L. juncus a rush, because it has rushlike leaves.] (Bot.) A bulbous plant of the genus Narcissus ( Narcissus Jonquilla), allied to the daffodil. It has long, rushlike leaves, and yellow or white fragrant flowers. The root has emetic properties. It is sometimes called the rush-leaved daffodil. See Illust. of Corona.