Not sure if these are the subspecies. I know Kurrajongs are common in the ACT but this planting of different ages is magnificent. They are in such good condition - so far none of the psyllid and other problems they get.
I once went through the ACT Government nursery records to gauge how size of nursery stock influenced teh chance of a plant becoming weedy. I can remember reading invoices for Kurrajong seed from Goulburn. Wagga and Melbourne and somewhere else so we should have diverse genetic stock in our plantings