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