life expectancy of ornamental trees
 

Each year I try to plant a tree on our property. Usually something
unusual as of late - Harry Lauder's Walking Stick (Corylus- avellana
Contorta), Lion's Head Japanese Maple (Acer palmatum 'Shishigashira'),
Purple Weeping Beech (Fagus sylvatica 'Purpurea Pendula' ).

Will these trees be around in 50 years? 100? Are their lists anywhere
of the 'world's oldest Harry Lauder's Walking Stick', etc.?

thx