yossam, elms, oaks and palm trees are some of the main ones, though you wouldn't get the palms anywhere near a farm building like this, they're mainly on the coast (I'm probably giving the impression of desert island type beaches, it's not, honest :-) ) Obviously, there are many other tree types, except on Bodmin Moor, where there are virtually no trees at all.
There ends your Cornish Botany lesson for today