Not all Narcissus flowers are yellow, although perhaps yellow is the classic color for "daffodils." The picture shows a white type called Narcissus 'Ice Follies.' Learn all about daffodils here: http://landscaping.about.com/od/floweringbulbs/p/daffodils.htm
Daffodils 1885 One of the few 19th century women to achieve recognition as a painter in her own right, Berthe Morisot, also modelled for several Impressionist painters, including Eduard Manet. Description from pinterest.com.