either of two high-elevation pine trees (Pinus aristata and P. longaeva) of the W U.S., having needles in clusters of five and cones with bristles: they are known for their often twisted, gnarled appearance and extremely long life
Either of two small slow-growing pines (Pinus aristata or P. longaeva) found at higher elevations of the western United States, having needles in fascicles of five. Specimens of P. longaeva in east-central California are among the oldest known living trees, achieving ages well over 4,000 years.
(plural bristlecone pines)
- Any of a small number of different small, slow-growing pine trees found in the western United States, some of which are over 4,000 years old.