Roupala Montana is another rainforest treasure. It is a heavy, dark red wood with a mottled or lacy pattern. This pattern comes from the broad pith rays of the trees. All trees have these rays radiating from the central pith; they are related to the way trees store nutrients. In Roupala Montana, these rays are particularly pronounced. They are best seen in the longitudinal section of the wood, where they appear as light brown or grey lines. Several other woods show a similar pattern, including lacewood and the Australian native silk oak (also occasionally sold as Roupala Montana). Of the three, Roupala Montana is the darkest and heaviest.