Excellent photos Phil love those giant grass trees' I guess the locals just picnic underneath them taking them for granted they are an awesome sight in flower.
It certainly puts into perspective my attempt at growing this ancient spp here in middle England
Did you find any Cordyline seeds lying around that would be an interesting thin trunked Cordyline to try?
Btw any idea's as to what the low temps maybe at Bunya Mts?