Itadori (Japanese knotweed) - left (317 L)
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| Museum number | 317 |
|---|---|
| Uemura number / title | ; "Haze-some 25" |
| Folder location | 4th shelf |
| Sample location | left (317 L) |
| Fiber type | silk |
| Color | brown |
| Dyestuff (Japanese common name) | 虎杖 : Itadori |
| Dyestuff (English common name) | Japanese knotweed |
| Dyestuff (botanical name) | Fallopia japonica (Houtt.) Ronse Decr. var. japonica (Polygonum cuspidatum Siebold et Zucc.) now Fallopia japonica |
| Plant part | root / dried (?) |
| Dyestuff extraction | boiled in water |
| Auxiliary agent in dye bath | - |
| Mordant | lime water |
| Other auxiliary agent | - |
| Uemura's notes | The concentration of the dye bath was high. The resultant color did not become red. Dyeing with its leaves and stems would hardly produce any color. |
| Uemura's date | - |