Trees are really intriguing and very interesting organisms. The oldest living-standing tree on earth is a bristlecone pine that is found in California, North America, and is believed to be over 4600 years old. Exact location of the tree is hidden since its old buddy "Prometheus" was cut down for "research" purposes. The age of the tree can be counted by counting the rings in its trunk.
Some more trees that possess a long life are mentioned below:
Prometheus
This tree, when cut, was approximately 4862-5000 years old. The tree was situated on the Wheeler Peak and was cut by a graduate student for the sheer purpose of his research.
Methuselah
This tree is believed to belong to Pinus longaeva species of trees. This species is known for its enduring life.
Sarv-e-Abarqu
This tree belongs to the Cypress species of trees and is generally found in different countries of Asia,
Roots of this tree in Sweden date back to Ice Age.
Llangernyw Yew
This tree belongs to the Common yew specifies of trees and is found in Western, central, and southern Europe along with Asia and Africa
Bristlecove tree 4600 years old.