Synonyms
Hydrangea serrata subsp. angustata (Franch. & Sav.) Kitam.
Hydrangea macrophylla subsp. angustata (Franch. & Sav.) Kitam.
Hydrangea macrophylla var. amagiana Makino
Hortensia serrata var. angustata (Franch. & Sav.) H.Ohba & S.Akiyama
Hydrangea hortensis var. angustata Franch. & Sav.