From Wikipedia http://en.wikipedia.org/wiki/Dryad
Dryads are mentioned in Milton’s Paradise Lost, in Coleridge, and in Thackeray’s work The Virginians.Keats addresses the nightingale as ‘light-winged Dryad of the trees’, in his Ode to a Nightingale. In the poetry of Donald Davidson they illustrate the themes of tradition and the importance of the past to the present. The poet Sylvia Plath uses them to symbolize nature in her poetry in “On the Difficulty of Conjuring up a Dryad”, and “On the Plethora of Dryads”.
In the ballet Don Quixote Dryads appear in a vision with Dulcinea before Don Quixote, they also appear in the classical ballet Sylvia.
Dryads are also featured extensively throughout The Chronicles of Narnia by British author C.S. Lewis and are shown to fight along side Aslan, son of the Emperor-Over-The-Sea, and the Pevensie Children.
The same characters recur in David Eddings’ The Belgariad, where Dryads live in seclusion on the Wood of the Dryads within the Tolnedran Empire and among the most prominent in the storyline is Ce’Nedra.
In the animated show Monster School, the character Rose Greendae is a dryad who can turn into a tree at will.
In the series Percy Jackson and the Olympians by Rick Riordan, there is a dryad named Juniper who is the girlfriend of Grover Underwood.
Other dryads in fiction:
Sue Maynard – Ebon Black and the Seven Dryads
Frank Stockton – The Lost Dryad
The Dryad Project – James Moy
The Dryad by Justin Huntly McCarthy
The Oracle of the Missing Dryad – Kristin Groulx
Mr Griffin and the Dryad – Frank Stockton