@ctrl-alt-nwo, That's excellent review given about Buckinghamia plant and given nice images after long time. I appreciate you coz every time update various plantation. I add something via internet sources.

This is a stunning plant in cultivation where it grows into a spectacular flowering medium to large shrub or small tree. In the wild in the rainforests of north Queensland it can grow into a small to medium sized tree but it rarely grows beyond shrub dimensions in cultivation, particularly in cooler climates such as Melbourne. It flowers in autumn, with the long creamy flowerheads often completely hiding the dark green glossy foliage. It makes a wonderful feature plant and should be trimmed back behind the spent flowers.

In its natural rainforest it grows to about 25 metres to reach the light above the tree canopy. In suburban gardens expect a small tree up to about eight metres, and in the cooler southern states it will reach the size of a medium shrub. The long creamy re-curved flowers are borne in autumn, have a wonderful fragrance and are also attractive to birds and bees.

In flower, it's stunning and a great plant for most gardens. The trees grow naturally in rainforests in Queensland and northern New South Wales, but also grow happily throughout most of Australia, including as far south as Melbourne. However Buckinghamia celsissima doesn't do well in Canberra, because it hates frosts, and it will not flower in the humidity and heavy rains of the northern tropics.

Image source : google
Content source : http://www.abc.net.au/gardening/factsheets/buckinghamia-celsissima/9423910