Tree or shrub just depends on the way they are grown. RHS definitions only
require a tree to have a clear trunk or bole before branching~~otherwise
its a shrub. So we could confuse both ourselves and the plant!!
Best Wishes
"David Hill" wrote in message
...
"......... In their native habitat, most are indeed small trees........."

I think you'll find they are Large shrubs not small trees.
Large shrubs can be up to 30ft or more, look at mature Rhododendrons, they
are large shrubs, and I have seen these to over 50 ft.

--
David Hill
Abacus nurseries
www.abacus-nurseries.co.uk