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 (1045 BC – 771 BC), 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..