Australian and New Zealand Gardening: Strange plant discovery!, 0 by GrandmaBinkie

GrandmaBinkie wrote:
I came across this odd-looking plant recently, while walking through scrubland near Brisbane. I have a feeling that it's a weed, but there were several species of honyeater feeding off it. I'd love to plant some in the garden to attract birds, but I need to know what it is first.! It has balloon-shaped, spiky green pods and none of the flowers appear to develop further than the one in the photo.