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| October 2007 at Nikko Botanical Garden |
October 2007 at Nikko Botanical Garden |
October 2007 at Nikko Botanical Garden |
| Family | Polygonaceae |
| Subfamily | Polygonoideae |
| Scientific name | Persicaria debilis (Meisner) H. Gross ex W. T. Lee |
| Synonyms | Persicaria triangularis (Meisner) Nakai; Polygonum debile Meisner; Polygonum thunbergii Siebold & Zuccarini var. coreana H. Léveillé; Truellum debile (Meisner) Sojak |
| Common name | (Japanese common name) miyama-tani-soba (ミヤマタニソバ, 深山谷蕎麦 [meaning: high mountain valley soba (soba = buckwheat)]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) Korea | |
| Habitat | Mountane forest |
| Chromosomal number | 2n=16 |
| Description | Plants 10-50cm tall. Leaves 1.5-5.5cm long. Flowers white perianth ca. 3mm long, flowering in August to September. Annual plants. |
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| October 2007 at Nikko Botanical Garden |
October 2007 at Nikko Botanical Garden |
October 2007 at Nikko Botanical Garden |
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| October 2007 at Nikko Botanical Garden |
