Amaryllis belladonna is a South African amaryllid which is very popular in Australia.
It's believed to have been brought here directly from The Cape because ships from Britain stopped there on the way to the new colony. Other amaryllids were also brought here and were crossed to raise a range of hybrids. It is believed that Amaryllis belladonna was crossed with a species of Brunsvigia to create hybrids which look like Amaryllis belladonna but with radial symmetry. A suggestion made by Bruce Knight many years ago was that it was actually Cybistetes longifolia (now Ammocharis longifolia) because of the shape of the flowers.
We have a variety of these hybrids and the first ones are in bloom now
cheers
fermi