Large-leaved Staff Vine Celastrus subspicata is an Australian native climbing shrub found in warm coastal rainforests, so I assume Ravensbourne National Park on the Great Dividing Range, where I photographed this one, is probably as far inland as it will be found. It is a very vigorous plant which will grow right up into the canopy of giant rainforest trees.
Earlier this year scientists who have been working with this plant published a paper saying they have extracted certain compounds from it which appear to be useful in treating prostate cancer. It also has anti-inflammatory compounds.
The flowers are fragrant.