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Noun: Rocky Mountain bristlecone pine
  1. Small slow-growing upland pine of western United States (Rocky Mountains) having dense branches with fissured rust-brown bark and short needles in bunches of 5 and thorn-tipped cone scales; among the oldest living things some over 4500 years old
    - bristlecone pine, Pinus aristata

Type of: pine, pine tree, true pine