| Family | Urticaceae |
| Scientific name | Elatostema japonicum Weddell var. majus (Maximovicz) H. Nakai & H. Ohashi |
| Synonyms | Elatostema involucratum Franchet & Savatier; Elatostema umbellatum Blume var. majus Maximovicz |
| Common name | (Japanese common name) uwabami-sou (ウワバミソウ, 蟒蛇草 [meaning: big snake weed]), mizu (ミズ [meaning: wet area weed]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) China | |
| Habitat | Mountane wet forest edge |
| Chromosomal number | unknown. |
| Description | Plants 30-40cm tall. Leaves 5-13cm long. Flowers flowering in April to July. 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 my home |
May 2008 at my home |