a coniferous tree, Pinus aristata, of the western US, bearing cones with bristle-like prickles: one of the longest-lived trees, useful in radiocarbon dating
bristlecone pine in American English
(ˈbrɪsəlˌkoʊn)
either of two high-altitude pine tree (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