| 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 |