The Douglas FIR is a species of coniferous tree native to western North America. It is the most common type of FIR tree in the Pacific Northwest and is also known as the Oregon Pine or Douglas Spruce. The scientific name for the Douglas FIR is Pseudotsuga menziesii, and it is named after the Scottish botanist David Douglas who first identified the tree in 1827. The FIR tree is an important source of timber and is used in construction, furniture making, and paper production. The three-letter acronym FIR stands for 'FIR Tree'.