資料來源 : WordNet®

bristlecone pine
     n : 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 [syn: {Rocky Mountain
         bristlecone pine}, {Pinus aristata}]