do you have a closer pic of the Trachycarpus on the right in the first pic ? it looks like it has a very thick and very hairy trunk .....looks really different to any other Trachycarpus i have seen looks really good !
Gosh thanks everyone! Been crazy busy this last week or so (work... sad but necessary).
Sean, you are spot on - it is indeed a Wollemia nobilis. Only had it a year but it has put on a foot in height already - fantastic plant IMO.
Arisaema speciosum make those wonderful huge leaves that remind me of a raptor in flight - not sure how they would fare in the heat of tropical Australia, I believe they prefer cool shade, maybe deep shade would be OK for them. Again this is my first try with these plants and I am glad I did. Next trick is to get them through whatever next winter throws at us. The point about sharp drainage being duly noted!
The Trachycarpus on the right has a fat wooly trunk and the one on the left is much more slender. Both exactly the same height and were bought at exactly the same time, so from the same batch for all I know - strange how they are so different isn't it?
Oh, also (Cordyman) the bamboo is a P. aurea that I 'prune' in May to reveal the canes by stripping off the side shoots to about head height. In spite of it being a humble aurea, it has just begun to put on some really fat culms about 40mm diameter this year for the first time - must have reached its maturity. I am well pleased - see pic attached...
I've said it before but you do have a great garden, you've already got a good jungley backbone and I think it will look sweet when you fill the boarders with tropicals.
I've got lots of tropical plants in my yard but after loosing the cordyline to winter and the idiot neighbours cutting down the trees at the bottom of the garden, I have no established plants.
In my next house I'll be spending a lot of money on established back bone plants.
looks really good ! 
