| Family | Urticaceae |
| Scientific name | Elatostema japonicum Weddell |
| Synonyms | Elatostema japonicum Weddell var. japonicum; Elatostema umbellatum Blume (var. umbellatum); Elatostema taquetii H. Léveillé; Pellionia umbellata (Blume) Weddell; Procris umbellata (Blume) Siebold & Zuccarini |
| Common name | (Japanese common name) hime-uwabami-sou (ヒメウワバミソウ, 姫蟒蛇草 [meaning: dwarf big-snake weed]), mizu (ミズ [meaning: wet area weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu |
| (Other nations) none | |
| Habitat | Mountane wet forest |
| Chromosomal number | unknown. |
| Description | Plants 20-30cm tall. Leaves 3-6cm long. Flowers flowering in March to May. Perennial plants. |
| Reference | Agent for hair growth (European Patent EP1915997/2008) |
| Plant Germination Inhibitor And Method Of Use Thereof (US Patent 20070274956) |
| May 2008 at Mt. Tsukuba |
May 2008 at Mt. Tsukuba |