Global richness patterns of alpine genus depend on multiple factors.

Environmental factors impact species richness differently across taxonomic groups, and understanding the geographic patterns and drivers influencing alpine plant richness remains limited. This study compiled global distribution data of 404 species of , an alpine genus, and analyzed the relative effects of different environmental factors and several previously proposed models on the variation of richness. By evaluating the effects of range size and regions on the relationships between richness and environmental factors, we found that all tested environmental factors had weak effects on richness variation for all species and wide-ranging species, while habitat heterogeneity was the best predictor for narrow-ranging species.