page_title: Pinus flexilis
section_title: Ecology
hierarchical_section_title: Pinus flexilis / Ecology
caption_attribution_description: Pinus flexilis — Limber Pine, cone. San Jacinto Mountains, Riverside County, California.
context_page_description: Pinus flexilis, the limber pine, is a species of pine tree-the family Pinaceae that occurs in the mountains of the Western United States, Mexico, and Canada. It is also called Rocky Mountain white pine.
  A limber pine in Eagle Cap Wilderness, Oregon has been documented as over 2000 years old, and another one was confirmed at 1140 years old. Another candidate for the oldest limber pine was identified in 2006 near the Alta Ski Area in Utah; called "Twister", the tree was confirmed to be at least 1700 years old and thought to be even older.
context_section_description: Pinus flexilis  is an important source of food for several species, including red squirrels and Clark's nutcrackers. American black bears may raid squirrel caches for limber pine nuts. Squirrels, Northern flickers, and mountain bluebirds often nest in the trees. There is some evidence that P. flexilis has a symbiotic relationship with nitrogen-fixing bacteria that inhabit the needles.
caption: Limber pine cone from San Jacinto Mountains, Peninsular Ranges
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