Polygonaceae
Polygonum japonicum
- Family
- Polygonaceae
- Genus
- Polygonum
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Common names
By language (4)
- Chinese
- 蚕茧草, 蚕茧蓼, 蠶繭草, 虎杖
- Japanese
- シロバナサクラタデ
- Korean
- 흰꽃여뀌
- lzh
- 蠶繭草
Synonyms
- Persicaria japonica (Meisn.) Nakai
- Polygonum japonicum var. japonicum
- Polygonum macranthum Meisn.
- Polygonum martini H.Lév. & Vaniot
- Polygonum myosurus Franch.
Flowers
- In flower
- August to November (from 21 flowering iNaturalist observations worldwide)
Photos
Photo: Eggmoon, CC BY-SA 3.0, from Wikimedia Commons
More in Polygonum
- Yard knotweedPolygonum avicularePolygonaceae
- Oval-leaf knotweedPolygonum arenastrumPolygonaceae
- Polygonum maritimumPolygonaceae
- Asiatic tearthumbPolygonum perfoliatumPolygonaceae
- Bellard's smartweedPolygonum patulumPolygonaceae
- European knotweedPolygonum arenariumPolygonaceae
- Narrowleaf knotweedPolygonum bellardiiPolygonaceae
- Polygonum cognatumPolygonaceae
- Horse-tail knotweedPolygonum equisetiformePolygonaceae
- KnotweedPolygonum oxyspermumPolygonaceae
- Douglas' knotweedPolygonum douglasiiPolygonaceae
- Erect knotweedPolygonum erectumPolygonaceae
Sources: classification, synonyms from World Flora Online Plant List (2026-06, CC0 1.0); common names, popularity from Wikidata (2026-10-26, CC0 1.0). About our plant data.