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Knot Weed
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| What kind of plant is it? |
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| Japanese names | Mizuhiki | |
| Family | Polygonaceae | |
| Origin | Throughout Japan | |
| Horticultural classification | Perennial | |
| Area(s) frequently seen in Japan | All |
| What color is it? |
| Flower |  |
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| Leaf |  |
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| When is it most attractive? |
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| Flower or foliage season |
| Jan. | Feb. | Mar. | Apr. | May | Jun. | Jul. | Aug. | Sep. | Oct. | Nov. | Dec. |
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| What size is it? |
| Plant height | 50-80cm | |
| Flower diameter | 0.2-0.3cm | |
| Inflorescence diameter | ||
| Inflorescence length |
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