Children (6 direct children, 6 direct and indirect children):
Rhododendron obtusum var. japonicum
Rhododendron obtusum var. tosaense
Rhododendron obtusum var. macrogemma
Rhododendron obtusum var. mikawanum
Rhododendron obtusum var. tubiflorum
Rhododendron obtusum var. saikaiense