rocky mountain bristlecone pine meaning and definition

ROCKY MOUNTAIN BRISTLECONE PINE noun

Definition of Rocky Mountain bristlecone pine (noun)

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
   • synonyms: bristlecone pine, Pinus aristata