heterotypic synonyms:
Rhododendron chengshienianum W.P. Fang;
protologue: Bot. Mag. 137: t. 8400 (1911)
2 875670 Rhododendron ambiguum HemsleyWild Fl. World: t. 102, fig. C () [B. Everard]
2 875670 Rhododendron ambiguum HemsleyW. Curtis, Bot. Mag., vol. 137 [ser. 4, vol. 7]: t. 8400 (1911) [M. Smith]