This week will be images from a day out at Mt Tomah Botanical Gardens - I have a busy work week ahead so took the 50mm out for the day in case there were no more outings or opportunities.
I believe this to be a Eucalyptus fastigata (Brown Barrel). It is huge - the diameter must be 1.5 - 2m. If my googling is correct this tree is likely to be several hundred years old! Brown Barrel grows well on the fertile soils of Mt Tomah and the surrounding basalt-capped mountains nearby.
I love this tree :)