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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.
Ponderosa pine forest is a plant association and plant community dominated by ponderosa pine and found in western North America. It is found from the British Columbia to Durango, Mexico . [ 1 ] In the south and east, ponderosa pine forest is the climax forest , while in the more northern part of its range, it can transition to Douglas-fir or ...
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).
Pygmy nuthatches (Sitta pygmaea) are also adapted to ponderosa pine woodlands. [9] Another species that can be supported by ponderosa pine is the Colorado chipmunk (Tamias quadrivitattus). T. quadrivitattus helps spread the seeds of the ponderosa pine by spreading out and burying its caches. This results in the seeds being further from the ...
Subgenus Pinus includes the yellow and hard pines. Pines in this subgenus have one to five needles per fascicle and two fibrovascular bundles per needle, and the fascicle sheaths are persistent, except in P. leiophylla and P. lumholtzii.
Populations of Willamette Valley ponderosa pines are often referred to as the separate variety willamettensis. Though not formally described, there have been efforts to publish this name and formal description. [2] [3] It is also referred to as a unique population of the Pacific ponderosa pine, P. p. subsp. benthamiana. [4] [5]
Young spring growth ("candles") on a loblolly pine: Monterey pine bark: Monterey pine cone on forest floor: Whitebark pine in the Sierra Nevada: Hartweg's pine forest in Mexico: The bark of a pine in Tecpan, Guatemala: A pine, probably P. pseudostrobus, in Guatemala
While the ponderosa pine is by far the most common tree species in the Coconino National Forest, vegetation type varies depending on the elevation of a certain area. At the lowest elevations, in the extreme southwestern portion of the forest, actual trees are scarce and the landscape is dominated by various small shrubs and sagebrushes .
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