Phytogeography is interested in the delimitation of floristic sets and in the origin of their different elements, while areography focuses its attention on the form and size of geographical range of species and other taxa. Ecology or, more precisely, ecogeography, answers questions on the reasons for the form and size of areas. From the current distribution maps of the 247 endemic genera of seed plants of China, it is possible to envisage five main models of partitioning:contiguity (A1-A2); inclusion (B1-B2...