| Family | Saxifragaceae |
| Scientific name | Astilbe thunbergii (Siebold et Zuccarini) Miquel var. formosa (Nakai) Nakai |
| Synonyms | Astilbe formosa Nakai; Astilbe thunbergii (Siebold et Zuccarini) Miquel var. formosa (Nakai) Ohwi forma nipponica Hiyama |
| Common name | (Japanese common name) hana chidake-sashi (ハナチダケサシ, 花乳茸刺 [meaning: flowering chidake-sashi (chidake-sashi = Astilbe microphylla)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (Kanto region, Central region) |
| (Other nations) none | |
| Chromosomal number | unknown |
| Description | Plants 40-70cm tall. Flowers white, flowering in July to August. Prerennial plants. |
| Note | Native to Japan. |
| August 2006 at mountane forest |
August 2006 at mountane forest |
August 2006 at mountane forest |