Fig. 1.

The phylogenetic structure of palm assemblages given species pools restricted to (A) global (shaded blue), (B) hemispheric (New World vs. Old World) (shaded green), and (C) biogeographic realm (shaded brown) extent. The NRI is plotted for the mass centroid of each sample unit (“botanical country”). Blue circles indicate significantly (P < 0.05) negative NRI values (phylogenetic overdispersion). Red circles represent significantly positive NRI values (phylogenetic clustering) with darker red and larger circles indicating increases in NRI (quantile classification based on values in A). An “x” indicates nonsignificant NRI values. Maps are in Behrmann projection.