Rocky Mountain bristlecone pine

Noun

1.

Rocky Mountain bristlecone pine - 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 Synonyms: bristlecone pine, Pinus aristata

bristlecone pine, pine, pine tree, Pinus aristata, true pine