The hamadryad was a woodlands nymph sometimes thought to have magical ties to a particular tree.
This is the final of a revised earlier concept (The Dryad), with more sophisticated lighting, shaders and modeling/sculpting. A larger-scale version can be seen at http://nymandigitalarts.showreel.tv/sites/default/files/artistgallery/397/Hamadryad-Final-halfsize.jpg