Hydrangea acuminata subsp. acuminata

Hirota, Shun K., Yahara, Tetsukazu, Fuse, Kengo, Sato, Hiroyuki, Tagane, Shuichiro, Fujii, Shinji, Minamitani, Tadashi & Suyama, Yoshihisa, 2022, Molecular phylogeny and taxonomy of the Hydrangea serrata complex (Hydrangeaceae) in western Japan, including a new subspecies of H. acuminata from Yakushima, PhytoKeys 188, pp. 49-71 : 49

Hydrangea acuminata subsp. acuminata

Hortensia serrata var. acuminata (Siebold & Zucc.) H. Ohba & S. Akiyama, J. Jap. Bot. 91: 347 (2016).

Hydrangea macrophylla (Thunb.) Ser. var. acuminata (Siebold & Zucc.) Makino, Ill. Fl. Nippon: 484, f. 1451 (1940), nom. tant.

Japanese name.

Sawa-ajisai, Nishino-yama-ajisai.

Distribution and habitats.

Hydrangea acuminata subsp. acuminata is widely distributed on the main island of Kyushu, and usually grows on the soil near streams and often on cliffs, and sometimes in disturbed habitats.

Note.

Ohba and Akiyama (2016) treated this species as a variety of Hortensia serrata . However, our phylogenetic analysis described below supports the treatment of it as a distinct species.