| Family | Saxifragaceae |
| Scientific name | Tanakaea radicans Franchet & Savatier |
| Synonyms | Tanakaea omeiensis Nakai; Tanakaea omeiensis Nakai var. nanchuanensis W. T. Wang |
| Common name | (Japanese common name) iwa-yuki-no-shita (イワユキノシタ, 岩雪ノ下 [meaning: rock-yuki-no-shita (yuki-no-shita = Saxifraga stolonifera Curtis)]) |
| (Chinese common name) e ping cao (峨屏草) | |
| (English common name) Japanese foam flower | |
| Distribution | (Japan) Honshu (Kanagawa Prefecture, Shizuoka Prefecture, Yamanashi Prefecture), Shikoku (Kohchi Prefecture) |
| (Other nations) China | |
| Habitat | Mountane streamside |
| Chromosomal number | 2n=16 |
| Description | Scapes 12-20cm tall. Leaves 2-9cm long, 1-5cm wide. petioles 1-13cm long. Flowers white calyxs 1-1.5mm long, flowering in May to June. Fruits 3-4mm long, seeds ca. 2mm long. Evergreen. Perennial plants. |
| Reference | Tanakaea radicans Franchet & Savatier |
| Tanakaea radicans Franch. & Sav. |
| (female plant) | (female plant) | (female plant) |
| May 2010 at my home |
May 2010 at my home |
May 2010 at my home |
| (female plant) |
| May 2010 at my home |