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| Photo by Mr. Ponpoko | Photo by Mr. Ponpoko | Photo by Mr. Ponpoko |
| November 2007 at swamp |
November 2007 at swamp |
November 2007 at swamp |
| Family | Polygonaceae |
| Subfamily | Polygonoideae |
| Scientific name | Persicaria hastatosagittata (Makino) Nakai ex T. Mori |
| Synonyms | Persicaria ussuriensis (Regel) Nakai ex T. Mori; Polygonum cavaleriei H. Léveillé; Polygonum hastatosagittatum Makino; Polygonum korshinskianum Nakai; Polygonum sagittatum Linnaeus var. ussuriense Regel; Polygonum strigosum R. Brown var. hastatosagittatum (Makino) Steward; Polygonum ussuriense (Regel) Nakai; Truellum hastatosagittatum (Makino) Soják; Truellum korshinskianum (Nakai) Soják |
| Common name | (Japanese common name) nagaba-no-unagi-tsukami (ナガバノウナギツカミ, 長葉鰻掴 [meaning: long leaved eel chatcher)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu |
| (Other nations) Russia (Far East), China, Taiwan | |
| Habitat | Swamp, rice paddy |
| Chromosomal number | 2n=22 |
| Description | Plants 30-80cm tall. Leaves 6-11cm long, petioles 10-25mm long. Flowers pink perianths ca. 3mm long, flowering in September to November. Fruits ca. 2.5mm long. Annual plants. |
| Reference | Polygonum hastatosagittatum Makino |
| Note | Rare species. |
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|---|---|---|
| Photo by Mr. Ponpoko | Photo by Mr. Ponpoko | Photo by Mr. Ponpoko |
| November 2007 at swamp |
November 2007 at swamp |
November 2007 at swamp |
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|---|---|
| Photo by Mr. Ponpoko | Photo by Mr. Ponpoko |
| November 2007 at swamp |
November 2007 at swamp |
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|---|---|---|
| October 2008 at lowland swamp |
October 2008 at lowland swamp |
October 2008 at lowland swamp |
