Which form of plant is only found in Australia, Hakea or Blechnum?
Blechnum:  By far the greatest species diversity is in tropical regions of the Southern Hemisphere, with only a few species reaching cool temperate latitudes in the Southern Hemisphere (notably "B. penna-marina", south to Cape Horn, Chile, the southernmost fern in the world) and Northern Hemisphere (notably "B. spicant", north to Iceland and northern Norway). Hakea: Hakea (pincushion tree) is a genus of 149 species of shrubs and small trees in the Proteaceae, native to Australia.
Hakea