Extended Data Fig. 10: Comparison of CHELSA climate variables that differ significantly between V. jucundum (LPT) and V. lautum (SGE) across the geographic range of Oreinotinus.

Compared across the entire geographic range of Oreinotinus, LPT and SGE species differ significantly from one another in ways that align with our more detailed studies V. jucundum and V. lautum. Specifically, SGE species differ significantly from LPT species in their tendency to experience lower precipitation throughout the year, higher precipitation seasonality and higher seasonal and diurnal temperature ranges; SGE species may also tend to experience lower minimum temperatures in the coldest month. Viburnum jucundum and V. lautum were compared in detail on the Central Plateau of Chiapas, Mexico (see Fig. 4). In making comparisons across the range of Oreinotinus, we used data for the entire geographic ranges of these focal species (that is, extending beyond the central Plateau of Chiapas; see Extended Data Fig. 3. Hypothesis testing method, box plot elements and density ridges formulation as in Extended Data Fig. 8. N = 1367 (713 LPT and 654 IGE specimens).