| Family | Parnassiaceae (also placed in Saxifragaceae) |
| Scientific name | Parnassia palustris L. |
| Synonyms | Parnassia palustris L. var. multiseta Ledebour; Parnassia parviflora de Candolle; Parnassia multiseta (Ledebour) Fernald |
| Common name | (Japanese common name) ume-bachi-sou (ウメバチソウ, 梅鉢草 [meaning: apricot cups weed]), ezo-ume-bachi-sou (エゾウメバチソウ, 蝦夷梅鉢草 [meaning: Ezo apricot cups weed (Ezo = an old name of Hokkaido)]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Russia, Korea, China, Mongolia, India, Kazakhstan, Kyrgyzstan, Tajikistan, Caucasus, Europe, Algeria, Morocco, Canada, USA | |
| Habitat | Swamp or wet field |
| Chromosomal number | 2n=18 |
| Description | Plants electing 7-15cm tall. Leaves 1-3.5cm wide. Flowers white 20-25mm across, flowering in August to October. Perennial plants. |
| Reference | Parnassia palustris L. |
| Parnassia palustris L. var. palustris | |
| Parnassia palustris var. multiseta Ledebour | |
| Preventions or remedies for arthritis (European Patent Application EP1407777/2005) |
| August 2006 at high marsh |
August 2006 at high marsh |
October 2008 at lowland swamp |