One-Thousand Year-Old Plants
nytimes.com
nytimes.com
[1] - https://www.iflscience.com/plants-and-animals/meet-worlds-la...
I'm also fairly sure that if other colonies were studied in more depth we could find some that are older and larger.
I'd be interested to find out how the original age of the colony is estimated.
Clearly that's not what we think.
The Rosa mundi, Rosa Gallica versicolor for example is a mutation that sprouted from a seed before 1581 where Holland was a part of Spain and before Britons started to colonize America. Is a creature relatively easy to find in the specialized market still.
Welwitschia mirabilis is a prehistoric unicorn that somehow managed to survive until today. There is not anything like that thing in the entire planet.