Stock photography, photos: Lone Tree Stock photos of Australian landscape, Single tree on hillside clouds in background. Photograph: © Paul Vallier Click for a larger image and more information Keywords associated with this stock photo: lone tree, single tree, eucalyptus, eucalypt, australia, queensland, outback australia, central queensland, australian bush, gum tree, lonliness, solitude, landscape, australian landscape, scenery, drought, nature,flora, australian flora. tree, hill side