Between Sidalcea and Backhousia, which genus can only be naturally found in Australia?
Sidalcea: Sidalcea is a genus (approx. 25 species) of the botanical family Malvaceae. Sidalcea:  They are native to West and Central North America. Backhousia: Backhousia is a genus of thirteen currently known species of flowering plants in the family Myrtaceae.
i don't know