The true firs, called true firs to distinguish the wood from Douglas-fir, consist of more than 40 species in North America, but only seven species produce commercial lumber. In eastern North America, ...
Douglas-fir (Pseudotsuga menziesii) is one of the premier species of the Western forests. Not only is the wood exceptionally strong for its weight, but the trees are abundant. Trees can grow over 250 ...
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