<P> Phytogeography (from Greek φυτό, phyto = plant and γεωγραφία, "geography" meaning also distribution) or botanical geography is the branch of biogeography that is concerned with the geographic distribution of plant species and their influence on the earth's surface . 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 . Geobotany, by contrast, focuses on the geographic space's influence on plants . </P> <P> Phytogeography is part of a more general science known as biogeography . Phytogeographers are concerned with patterns and process in plant distribution . Most of the major questions and kinds of approaches taken to answer such questions are held in common between phyto - and zoogeographers . </P> <P> Phytogeography in wider sense (or geobotany, in German literature) encompasses four fields, according with the focused aspect, environment, flora (taxa), vegetation (plant community) and origin, respectively: </P> <Ul> <Li> plant ecology (or mesology - however, the physiognomic - ecological approach on vegetation and biome study are also generally associated with this field); </Li> <Li> plant geography (or phytogeography in strict sense, chorology, floristics); </Li> <Li> plant sociology (or phytosociology, synecology - however, this field doesn't prescind from flora study, as its approach to study vegetation relies upon a fundamental unit, the plant association, which is defined upon flora). </Li> <Li> historical plant geography (or paleobotany, paleogeobotany) </Li> </Ul>

Physical geography of the earth in relation to phytogeography