Plectranthus japonicus var. macraei (Benth.) M.R.Almeida, 2003 variety doubtful

Isodon japonicus f. albiflorus (Honda) H.Hara form synonym

Plectranthus japonicus var. glaucocalyx (Maxim.) Koidz. variety synonym

Amethystanthus japonicus var. albiflorus Honda variety synonym

Plectranthus glaucocalyx var. japonicus Maxim. variety synonym

Plectranthus glaucocalyx f. glabricalyx Nakai ex Kudô form synonym

Plectranthus glaucocalyx f. glabricalyx Nakai form homotypic synonym

Amethystanthus japonicus f. glabricalyx (Nakai ex Kudô) Nakai form synonym

Isodon japonicus var. japonicus variety accepted

Plectranthus japonicus var. japonicus variety accepted

Plectranthus maximowiczii Miq. species synonym

Plectranthus glaucocalyx Maxim. species synonym

Plectranthus buergeri Miq. species synonym

Rabdosia japonica var. glaucocalyx (Maxim.) H.Hara variety synonym

Rabdosia japonica f. albiflora (Honda) H.Hara form synonym

Rabdosia japonica f. albida (Honda) H.Hara form synonym

Rabdosia glaucocalyx (Maxim.) Prob. species synonym

Isodon japonicus var. glaucocalyx (Maxim.) H.W.Li variety accepted

Isodon glaucocalyx (Maxim.) Kudô species synonym

Amethystanthus glaucocalyx (Maxim.) Nemoto species synonym

Amethystanthus japonicus f. albidus Honda form synonym