High Quality Content by WIKIPEDIA articles! Phytogeography (from Greek phyto = plant and geography meaning also distribution), also called geobotany, is the branch of biogeography that is concerned with the geographic distribution of plant species. Phytogeography is concerned with all aspects of plant distribution, from the controls on the distribution of individual species ranges (at both large and small scales, see species distribution) to the factors that govern the composition of entire communities and floras.