Coniferous forests contain trees with cones and generally evergreen needle or scale-shaped leaves. Important genera in the northern hemisphere include pines (Pinus), spruces (Picea), firs (Abies), redwoods (Sequoia), Douglas firs (Pseudotsuga), and larches (Larix). Different genera dominate the conifer forests of the southern hemisphere. Conifer forests occupy regions with cool-moist to very cold winters and cool to hot summers. Many conifer forests originated as plantations of species from other continents. Among conifer formations in North America are the slow-growing circumpolar taiga (boreal), the subalpine-montane, the southern pine, and the Pacific Coast temperate rain forest. Softwoods, another name for conifers, are used for lumber, panels, and paper.