- Decumaria barbara
- Decumaria barbara L.
- Dichroa febrifuga
- Hydrangea alternifolia
- Hydrangea alternifolia Siebold
- Hydrangea ampla
- Hydrangea ampla (Chun) Y. De Smet & C. Granados
- Hydrangea anomala
- Hydrangea anomala 'petiolaris'
- Hydrangea anomala D.Don
- Hydrangea anomala D. Don
- Hydrangea anomala D. Don subsp. petiolaris (Siebold & Zucc.) E. M. McClint.
- Hydrangea anomala David Don, 1825 subsp. anomala David Don, 1825
- Hydrangea anomala David Don, 1826 subsp. petiolaris Siebold & Zuccharini, 1839
- Hydrangea anomala David Don, 1827 subsp. petiolaris Siebold & Zuccharini, 1838
- Hydrangea arborescens
- Hydrangea arborescens 'annabelle'
- Hydrangea arborescens 'annabella'
- Hydrangea arborescens 'grandiflora'
- Hydrangea arborescens L.
- Hydrangea arborescens L. subsp. discolor (Ser.) E.M.McClint.
- Hydrangea arborescens Linné, 1753 subsp. arborescens Linné, 1753
- Hydrangea arborescens Linné, 1753 subsp. radiata Walter, 1786
- Hydrangea aspera
- Hydrangea aspera 'sargentiana'
- Hydrangea aspera Buch.-Ham. ex D. Don
- Hydrangea aspera David Don, 1825 subsp. Villosa Rehder, 1911
- Hydrangea aspera David Don, 1825 subsp. strigosa Rehder
- Hydrangea barbara
- Hydrangea barbara (L.) Bernd Schulz
- Hydrangea bifida
- Hydrangea bifida (Maxim.) Y. De Smet & C. Granados
- Hydrangea bretschneideri
- Hydrangea bretschneideri Dippel
- Hydrangea chinensis
- Hydrangea chinensis Maxim.
- Hydrangea cinerea
- Hydrangea cinerea Small
- Hydrangea davidii
- Hydrangea davidii Franch.
- Hydrangea febrifuga
- Hydrangea febrifuga (Lour.) Y.De Smet & Granados
- Hydrangea febrifuga (Lour.) Y. De Smet & C. Granados
- Hydrangea heteromalla
- Hydrangea heteromalla D. Don
- Hydrangea heteromalla D.Don
- Hydrangea heteromalla David Don, 1826
- Hydrangea heteromalla David Don, 1829
- Hydrangea heteromalla David Don, 1828
- Hydrangea hirta
- Hydrangea hirta (Thunb.) Siebold
- Hydrangea hirta Thunberg, 1784
- Hydrangea hydrangeoides
- Hydrangea hydrangeoides (Siebold & Zucc.) Bernd Schulz
- Hydrangea hypoglauca
- Hydrangea hypoglauca Rehder
- Hydrangea involucrata
- Hydrangea involucrata Siebold
- Hydrangea involucrata Siebold & Zuccharini, 1828
- Hydrangea liukiuensis
- Hydrangea liukiuensis Nakai
- Hydrangea longipes
- Hydrangea longipes Franch.
- Hydrangea luteo-venosa
- Hydrangea macrophylla
- Hydrangea macrophylla ~sp
- Hydrangea macrophylla 'mariesii'
- Hydrangea macrophylla 'sanderiana'
- Hydrangea macrophylla 'mariesi perfecta'
- Hydrangea macrophylla 'white wave'
- Hydrangea macrophylla 'blaumeise'
- Hydrangea macrophylla (Thunb.) Ser.
- Hydrangea macrophylla (Thunb.) Ser. var. megacarpa Ohwi
- Hydrangea macrophylla (Thunb.) Ser. subsp. serrata (Thunb.) Makino
- Hydrangea macrophylla Thunberg, 1830 subsp. Serrata Thunberg, 1929
- Hydrangea macrophylla Thunberg, 1830 subsp. macrophylla Thunberg, 1830
- Hydrangea macrophylla x macrophylla subsp. serrata
- Hydrangea paniculata
- Hydrangea paniculata Sieb.
- Hydrangea paniculata 'praecox'
- Hydrangea paniculata Siebold
- Hydrangea paniculata f. velutina
- Hydrangea paniculata Siebold f. velutina (Nakai) H.Ohba
- Hydrangea paniculata Siebold & Zuccharini, 1874
- Hydrangea petiolaris
- Hydrangea petiolaris Sieb. & Zucc.
- Hydrangea petiolaris Siebold & Zucc.
- Hydrangea platyarguta
- Hydrangea platyarguta Y. De Smet & Samain
- Hydrangea platyarguta Y. De Smet & C.Granados
- Hydrangea quercifolia
- Hydrangea quercifolia ~sp
- Hydrangea quercifolia W. Bartram
- Hydrangea quercifolia W.Bartram
- Hydrangea quercifolia W.Bartram 1791
- Hydrangea radiata
- Hydrangea radiata Walter
- Hydrangea robusta
- Hydrangea robusta J.D.Hooker & Thomson
- Hydrangea robusta Hook. f. & Thomson
- Hydrangea robusta Hook.f. & Thomson
- Hydrangea sargentiana
- Hydrangea sargentiana Rehder
- Hydrangea scandens
- Hydrangea scandens (L.f.) Ser. subsp. liukiuensis (Nakai) E.M.McClint.
- Hydrangea scandens (L. f.) Ser.
- Hydrangea scandens (L.f.) Ser.
- Hydrangea scandens Maximmwicz, 1879 subsp. Scandens Maximmwicz, 1879
- Hydrangea seemannii
- Hydrangea seemannii L.Riley
- Hydrangea serrata
- Hydrangea serrata 'acuminata'
- Hydrangea serrata 'bluebird'
- Hydrangea serrata (Thunb.) Ser. var. serrata
- Hydrangea serrata (Thunb.) Ser.
- Hydrangea serratifolia
- Hydrangea serratifolia (Hook. & Arn.) F.Phil.
- Hydrangea serratifolia Hooker & Arnott, 1881
- Hydrangea sikokiana
- Hydrangea sikokiana Maxim.
- Hydrangea sp.
- Hydrangea sp. L., 1753
- Hydrangea spp.
- Hydrangea strigosa
- Hydrangea strigosa Rehder
- Hydrangea viburnoides
- Hydrangea viburnoides (Hook. f. & Thomson) Y. De Smet & C. Granados
- Hydrangea xanthoneura
- Hydrangea xanthoneura Diels
- Hydrangea ~nd
- Hydrangea ~nd ~sp
- Hydrangea ~sp
- Hydrangea ~sp ~sp
- Schizophragma hydrangeoides
- Schizophragma hydrangeoides Siebold & Zucc.
- Schizophragma hydrangeoides Siebold & Zuccharini, 1879
- Schizophragma integrifolium
- Schizophragma integrifolium (Franch.) Oliv.