Family: Amaryllceae (formerly included in the Lily family)
Native to Europe and north Africa.
Occurrence: Often persisting in old house sites.
Daffodil (Narcissus pseudonarcissus) is similar. It has larger yellow flowers and the central trumpet is a deeper yellow. There is much variation; there are numerous cultivars and double forms.
Photos: 1: Jonquil flowering stem.
2: Daffodil. Castlemine, where it is probably planted.
3: Jonquils persisting in an old house site.
4: Jonquils on Griffiths Island.