Knowra Pinus longaeva Pinus longaeva Pinus longaeva, the Great Basin bristlecone pine, is a high-elevation conifer native to the southwestern United States. Some living individuals are more than 4,000 years old, making it among the longest-lived non-clonal organisms known.
Pinaceae : The conifer family that includes pines, firs, spruces, larches, and hemlocks. This family places the Great Basin bristlecone among the major cone-bearing trees.
Tree rings : Concentric layers of wood formed by many trees during successive periods of growth. Annual rings allow the ages of bristlecone pines to be counted and compared.
Methuselah (tree) : A Great Basin bristlecone pine in California’s White Mountains, known for its exceptional age. This living tree is a famous example of the species’ extreme longevity.
Tree-ring dating : The use of annual growth rings to determine the calendar dates of wood. Long bristlecone records extend precisely dated chronology far into the past.
Pinus : A genus of evergreen conifers commonly called pines, with needle-like leaves and seed-bearing cones. Pinus longaeva is one species within this diverse pine genus.
Dendrochronology : The scientific dating and study of annual tree rings. Cross-dating ring patterns establishes long, precisely dated records from this species.
Prometheus (tree) : A Great Basin bristlecone pine cut down in Nevada in 1964, later found to be more than 4,800 years old. Its felling became a prominent case in debates about research, access, and conservation.
Holocene : The current geological epoch, beginning about 11,700 years ago after the last major glacial period. The oldest bristlecone pines have lived through a substantial portion of this epoch.
Bristlecone pine : A common name for several high-elevation pine species with persistent cone scales bearing bristle-like tips. The name links this species to related bristlecone pines in western North America.
Senescence : The gradual decline in biological function associated with aging. The species’ extraordinary lifespan raises questions about how tree aging differs from senescence in animals.
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