The size of each circle is proportionate to the number of species present matching our inclusion criteria. The Venn diagram indicates spatial exclusivity, which is used to calculate biogeographical distribution metrics of endemism , overlap , orcosmopolitanism . For example, in our Malesian dataset there are 318 Dipterocarpaceae, thus Sundaland endemism is calculated as 264/318 = 0.83; Sundaland overlap as (264+30+0+3)/318 = 0.93; andcosmopolitanism as 3/318 = 0.01. The endemism metrics are translated into a CYMK hex code, with Sundaland as magenta, Wallacea as yellow, and Sahul as cyan; Cosmopolitanism as black. These three families are labeled on all scatterplots as 1) Dipterocarpaceae, 2) Ericaceae, 3) Pteridaceae.