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bristlecone pine

a pine, Pinus aristata, of the southwestern U.S., bearing short needles crowded into long, thick bundles and cones having scales tipped with a slender, curved spine.
Also called hickory pine.
1890-95, Americanism; bristle + cone Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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British Dictionary definitions for bristle-cone pine

bristlecone pine

a coniferous tree, Pinus aristata, of the western US, bearing cones with bristle-like prickles: one of the longest-lived trees, useful in radiocarbon dating
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Encyclopedia Article for bristle-cone pine

bristlecone pine

(species Pinus longaeva and P. aristata), small pine tree ranging from about 5 to 16 metres (15 to 50 feet) in height and belonging to the family Pinaceae. The species are native to the Rocky Mountains and other ranges of the southwestern United States, occurring usually at elevations above 1,700 metres (5,500 feet). P. longaeva has the longest life-span of any conifer known. A stand of western bristlecone pine on Wheeler Peak in eastern Nevada is known to contain several trees over 3,000 years old, and one of them is thought to be about 5,000 years old

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Encyclopedia Britannica, 2008. Encyclopedia Britannica Online.
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