This Twilight Series wallpaper contains
sitka spruce, picea sitchensis, douglas fir, ponderosa, ponderosa pine, western yellow pine, bull pine, and pinus ponderosa.
There might also be
mountain hemlock, black hemlock, tsuga mertensiana, american white birch, paper birch, paperbark birch, canoe birch, betula cordifolia, betula papyrifera, hemlock, and hemlock tree.