These include jack pine, balsam fir, black spruce, white birch, and poplar. The most commons trees are elm, alder, sycamore, poplar, willow and hornbeam. Most of the taiga consists of black spruce, aspen and poplar forest. River valleys contain willow, poplar and caragana shrubs. These are largely deciduous, typically aspen, poplar, and willow. They built houses covered with palm leaves or the bark of cypress or poplar trees. Valleys of the rivers contain willow, poplar and caragana shrubs. It is also practiced for biomass crops grown for fuel, such as poplar or willow. This coloration closely mimics that of the winter leaf of the tulip poplar. A yellow dye is produced from the bark of the white poplar. All of his plants die, except for one poplar tree. Combinations such as hazel and poplar also work well. Typically camembert tends to be sold whole in thin, round, wooden containers made from poplar. Logs from the poplar provide a growing medium for shiitake mushrooms. At the top of the tree (poplar) appeared the red flag.