Fir
'Eternal Life' (Ancient Egypt, China), 'Truth' (Druids), 'Time'.
Scandinavian legend of a boy lost on Christmas Eve and found under a Fir tree created the Christmas Tree tradition, as the ice on them shone in the sunlight to find the boy. Christmas Trees then came to Germany and to Britain in the 19th century.
Douglas Firs have exceedingly thick bark due to evolution to fight frequent forest fires.