Hydrangea otaksa Siebold & Zucc.

First published in Fl. Jap. 1: 105 (1839)
This species is a synonym of Hydrangea macrophylla

POWO follows these authorities in synonymising this name:

  • Akiyama, S., Thijsse, G., Esser, H.-J. & Ohba, H. (2014). Siebold and Zuccarini's type specimens and original materials from Japan, part 5. Angiosperms. Dicotyledoneae 4. The Journal of Japanese Botany 89: 279-330. [Cited as Hydrangea macrophylla.]
  • Chang, C.S., Kim, H. & Chang, K.S. (2014). Provisional checklist of vascular plants for the Korea peninsula flora (KPF): 1-660. DESIGNPOST. [Cited as Hydrangea macrophylla.]
  • Iwatsuki, K., Boufford, D.E. & Ohba, H. (eds.) (2001). Flora of Japan IIb: 1-550. Kodansha Ltd., Tokyo. [Cited as Hydrangea macrophylla.]
  • Ohba, H. & Akiyama, S. (2014). A revision of the species of Hydrangea (Hydrangeaceae) described by Siebold and Zuccarini, part 2. Bulletin of the National Museum of Nature and Science, Series B (Botany) 40: 29-45. [Cited as Hydrangea macrophylla.]

Other Data

Other Kew resources that provide information on this taxon:


  • Kew Names and Taxonomic Backbone

    • The International Plant Names Index and World Checklist of Vascular Plants 2022. Published on the Internet at http://www.ipni.org and https://powo.science.kew.org/
    • © Copyright 2022 International Plant Names Index and World Checklist of Vascular Plants. http://creativecommons.org/licenses/by/3.0