Global patterns of Rhododendron diversity explained by island biogeography theory and habitat heterogeneity

• Global Rhododendron hotspots are mainly distributed in the Hengduan Mountains of southwestern China and the southern regions of the Himalayas.
• Rhododendron diversity patterns were most strongly explained by proxies of island biogeography theory (i.e., mountain area) and habitat heterogeneity (i.e., elevation range).