Hydrangea serrata f. alborosea (Koidz.) Sugim. form synonym

Hydrangea serrata subsp. angustata (Franch. & Sav.) Kitam. subspecies synonym

Hydrangea hortensis var. lindleyana G.Nicholson variety synonym

Hydrangea macrophylla var. belzonii (Siebold & Zucc.) Nakai variety synonym

Hydrangea acuminata subsp. australis (T.Yamaz.) Yahara subspecies homotypic synonym

Hydrangea serrata subsp. yesoensis (Koidz.) Kitam. subspecies synonym

Hydrangea hortensia var. belzonii (Siebold & Zucc.) Maxim. variety synonym

Hydrangea serrata var. repens Sugim. variety synonym

Hydrangea cyanea G.W.Johnson & R.Hogg species synonym

Hydrangea opuloides var. belzonii (Siebold & Zucc.) Dippel variety synonym

Hydrangea yesoensis f. alba Honda form synonym

Hydrangea macrophylla var. amagiana Makino variety synonym

Hydrangea serrata f. alba (Honda) Sugim. form synonym

Hydrangea opuloides var. lindleyana (G.Nicholson) Rehder variety synonym

Hydrangea macrophylla f. yesoensis (Koidz.) Ohwi form synonym

Hydrangea serrata f. cuspidata (Thunb.) Nakai form synonym

Hydrangea stellata subsp. prolifera Regel, 1866 subspecies doubtful

Hydrangea macrophylla subsp. yezoensis (Koidz.) Kitam. subspecies synonym

Viburnum cuspidatum Thunb. species synonym

Hydrangea minamitanii (H.Ohba) Yahara & Tagane species synonym

Hydrangea yesoensis Koidz. species synonym

Hydrangea cuspidata (Thunb.) Makino species synonym

Hydrangea macrophylla subsp. yesoensis (Koidz.) Kitam. subspecies synonym

Hydrangea serrata var. yesoensis (Koidz.) H.Ohba variety accepted

Hydrangea serrata var. minamitanii H.Ohba variety accepted

Hydrangea serrata var. megacarpa (Ohwi) H.Ohba variety synonym

Hydrangea serrata var. australis T.Yamaz. variety accepted

Hydrangea serrata var. angustata (Franch. & Sav.) H.Ohba variety accepted

Hydrangea belzonii Siebold & Zucc. species synonym

Hydrangea macrophylla var. acuminata (Siebold & Zucc.) Makino variety synonym

Hydrangea serrata var. serrata variety accepted

Hydrangea lindleyana (G.Nicholson) G.Nicholson species synonym

Hydrangea macrophylla var. megacarpa Ohwi variety synonym

Hydrangea stellata subsp. stellata subspecies accepted

Hydrangea macrophylla f. cuspidata (Thunb.) H.Hara form synonym

Hydrangea opuloides var. angustata Matsum. variety synonym

Hydrangea cuspidata (Thunb.) Miq. species synonym

Hydrangea hortensis var. angustata Franch. & Sav. variety synonym

Hortensia serrata var. minamitanii (H.Ohba) H.Ohba & S.Akiyama variety synonym

Hortensia cuspidata (Thunb.) H.Ohba & S.Akiyama species synonym

Hortensia cuspidata f. yesoensis (Koidz.) H.Ohba & S.Akiyama form synonym

Hortensia serrata var. angustata (Franch. & Sav.) H.Ohba & S.Akiyama variety synonym

Hydrangea macrophylla subsp. angustata (Fr. & Sav.) Kitam. subspecies synonym