| Family | Polygonaceae |
| Subfamily | Polygonoideae |
| Scientific name | Persicaria senticosa (Meisner) H. Gross |
| Synonyms | Persicaria senticosa (Franch. et Savat.) H. Gross; Chylocalyx senticosus Meisner; Polygonum babingtonii Hance; Polygonum senticosum var. formosanum Ohwi; Polygonum typhoniifolium Hance; Truellum japonicum Houttuyn. |
| Common name | (Japanese common name) mamako-no-siri-nugui (ママコノシリヌグイ, 継子ノ尻拭 [meaning: bullying stepchild]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu, Okinawa |
| (Other nations) Russia (Far East), Korea, China, Taiwan | |
| Habitat | Swamp, wet field, riverside, seaside |
| Chromosomal number | 2n=24 |
| Description | Plants 100-200cm long. Leaves 3-6cm long. Flowers red perianths ca. 3mm long, flowering in May to October. Fruits ca. 3mm across. Annual plants. |
| Reference | Persicaria senticosa (Meisn.) H. Gross |
| Polygonum senticosum (Meisner) Franchet & Savatier |
| September 2006 at lowland swamp |
September 2006 at lowland swamp |
September 2006 at lowland swamp |
| September 2006 at lowland swamp |
September 2006 at lowland swamp |
September 2006 at lowland swamp |