Northern slope of Manawa Tāwhi where the lone wild Pennantia baylisiana grows
The last wild plant on Manawa Tāwhi
Pennantia baylisiana
The tree species known only as Pennantia baylisiana could be the rarest plant on Earth. In fact, the Guinness Book of World Records once called it that. Just a single tree exists in the wild, on one of the Three Kings Islands off the coast of New Zealand, where it has sat, alone, since 1945. [Apr 20, 2010]
https://blogs.scientificamerican.com/extinction-countdown/worlds-rarest-tree-gets-some-help/
The tree, which had been buried in 26 feet of soil, measures eight feet in diameter and 65 feet in length. Carbon dating revealed it lived for 1,500 years, between 41,000 and 42,500 years ago.