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Pinus ponderosa, commonly known as the ponderosa pine, [3] bull pine, blackjack pine, [4] western yellow-pine, [5] or filipinus pine, [6] is a very large pine tree species of variable habitat native to mountainous regions of western North America. It is the most widely distributed pine species in North America.
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Ponderosa pine forest is the largest western forest type in the United States. [2] Ponderosa pine is the principal species on over 110,000 km 2 (27,000,000 acres) and is present on an additional 55,000 km 2 (14,000,000 acres).
Jeffrey pine wood and ponderosa pine wood are sold together as yellow pine. [6] Both kinds of wood are hard (with a Janka hardness of 550 lbf (2,400 N)), but the western yellow pine wood is less dense than southern yellow pine wood (28 lb/cu ft (0.45 g/cm 3 ) versus 35 lb/cu ft (0.56 g/cm 3 ) for shortleaf pine).
The Willamette Valley ponderosa variant only grows on the valley floor, unlike the Douglas-fir, which grows on hillsides, and the wood is softer and easier to mill than the native hardwoods. [1] Because of this, when early settlers used wood from the trees to build homes and cleared land for agriculture, the population was "decimated". [ 1 ]
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The Rocky Mountain ponderosa pine forest is a plant community at an elevation of 2,000–2,700 metres (6,600–8,900 ft) in the Rocky Mountains. [ 1 ] [ 2 ] : 89 It is an important temperate coniferous forest ecoregion , including some endemic wildlife and grass species that are only found in this ponderosa pine ( Pinus ponderosa ) habitat .
Pinus, the pines, is a genus of approximately 111 extant tree and shrub species. The genus is currently split into two subgenera: subgenus Pinus (hard pines), and subgenus Strobus (soft pines).