Individual trees

miniature city park in downtown Portland, Oregon, United States

tree grown from one of the 500 seeds taken into orbit around the Moon by Stuart Roosa during the Apollo 14 mission in 1971

individual tree with unique value, which is considered irreplaceable

Wikimedia list article

Jeongipumsong () is a historically significant Korean pine tree (Pinus koraiensis) located at the foot of the mountain Songnisan in Boeun County, North Chungcheong Province, South Korea. Estimated to be around 600 years old, the tree is designated Natural Monument of South Korea No. 103 by the South Korean government. Its name translates to "Second Senior Rank Pine Tree", a ministerial title legendarily bestowed upon it by King Sejo of the Joseon dynasty in the 15th century.