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Pinus edulis
''Pinus edulis'', the Colorado pinyon, two-needle pinyon, or piñon pine,〔(【引用サイトリンク】New Mexico Secretary of State: KID'S Corner )〕 is a pine in the pinyon pine group whose ancestor was a member of the Madro-Tertiary Geoflora (a group of drought resistant trees) and is native to the United States.
==Distribution and habitat==
The range is in Colorado, southern Wyoming, eastern and central Utah, northern Arizona, New Mexico, and the Guadalupe Mountains in westernmost Texas. It occurs at moderate altitudes of , rarely as low as and as high as . It is widespread and often abundant in this region, forming extensive open woodlands, usually mixed with junipers in the pinyon-juniper woodland plant community. The Colorado pinyon (piñon) grows as the dominant species on 4.8 million acres () in Colorado, making up 22% of the state's forests. The Colorado pinyon has cultural meaning to agriculture, as strong piñon wood "plow heads" were used to break soil for crop planting at the state's earliest known agricultural settlements.
There is one known example of a Colorado pinyon growing amongst Engelmann spruce (''Picea engelmannii'') and limber pine (''Pinus flexilis'') at nearly on Kendrick Peak in the Kaibab National Forest of northern Arizona.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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