heterotypic synonyms:
Azalea japonica Kuntze;
protologue: Fl. Jap. (Siebold) 1: 23 (1835)
2 876951 Rhododendron metternichii Siebold & Zucc.P.F. von Siebold, J.G. Zuccarini, Fl. Jap., vol. 1 : t. 9 (1875)
2 876951 Rhododendron metternichii Siebold & Zucc.Naturalis: ()