Thus A plant formaiion is a group of associations occupying habitats - iich are in essentials identical with each other.
In the case of the southern continents the difficulty is, however, to determine whether allied groups of mammals (and other animals) have reached their present isolated habitats by dispersal from the north along widely sundered longitudinal lines, or whether such a distribution implies the former existence of equatorial land-connexions.
But the habitats overlap, and persimmons and magnolias of different species are common and notable in both areas.
How would you define habitats? Add your definition here.