Persicaria tinctoria
From Infogalactic: the planetary knowledge core
(Redirected from Polygonum tinctorum)
| Persicaria tinctoria | |
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| File:Persicaria tinctoria bergianska.JPG | |
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P. tinctoria
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| Persicaria tinctoria |
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Persicaria tinctoria is a species of flowering plant in the buckwheat family. Common names include Chinese indigo and "Japanese indigo."[2][3] It is native to Eastern Europe and Asia.
The leaves were a source of indigo dye. It was already in use in the Western Zhou period (ca. 1045-771 B.C.), and was the most important blue dye in East Asia until the arrival of Indigofera from the south.
