Persicaria tinctoria explained

Persicaria tinctoria is a species of flowering plant in the buckwheat family. Common names include Chinese indigo, Japanese indigo and dyer's knotweed.^{[1] [2] [3]} It is native to Eastern Europe and Asia.

The leaves are a source of indigo dye. It was already in use in the Western Zhou period (c. 1045–771 B.C.), and was the most important blue dye in East Asia until the arrival of Indigofera from the south.

See also

• Indigofera tinctoria

Notes and References

1. http://www.elizabethanonymous.com/indigo Japanese Indigo Polygonum tinctorium also called: Persicaria tinctoria
2. http://animpartationofcolor.blogspot.com/2011/10/japanese-indigo-polygonum-tinctorium.html An Impartation of Color: Japanese Indigo (Polygonum tinctorium) – leaves
3. Web site: Dye seeds Japanese indigo, Polygonum tinctorium. 2023-08-23. https://web.archive.org/web/20230605201159/https://www.stillgarments.com/english/shop/saatgut/faerberknoeterich-indigo/. 2023-06-05. [...] Japanese indigo or dyer's knotweed is a plant that contains indigo precursors in the green leaves..