In article , Archimedes Plutonium
writes
England had hickory species

There were no hickories (Carya) in England during historical times until
they were introduced from America. There are no Carya species native to
Europe (1 native to China, 1 to Tonkin, the remainder to North America)
so it's likely that hickories have been absent from England for a long
time. Googling finds sites that report that Carya has been extinct in
Europe for 2 million years.
--
Stewart Robert Hinsley