What continent are the genuses Allocasuarina and Acacia mainly native to?
Allocasuarina Allocasuarina is a genus of trees in the flowering plant family Casuarinaceae. They are endemic to Australia, occurring primarily in the south. Like the closely related genus "Casuarina", they are commonly called sheoaks or she-oaks.
Acacia plectocarpa Acacia plectocarpa is a tree or shrub belonging to the genus "Acacia" and the subgenus "Juliflorae". It is native to a large area in the Northern Territory and the Kimberley region of Western Australia.