Persicaria tinctoria

Persicaria tinctoria is a species of flowering plant in the buckwheat family. Common names include Chinese indigo, Japanese indigo and dyer's knotweed.[2][3][4] It is native to Eastern Europe and Asia.

Persicaria tinctoria
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Order: Caryophyllales
Family: Polygonaceae
Genus: Persicaria
Species:
P. tinctoria
Binomial name
Persicaria tinctoria
(Aiton) Spach 1841
Synonyms[1]
  • Polygonum tinctorium Aiton 1789
  • Ampelygonum tinctorium (Aiton) Steud.
  • Persicaria tinctoria (Aiton) H. Gross
  • Pogalis tinctoria (Aiton) Raf.

The leaves were 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

References
  1. Persicaria tinctoria. The Plant List.
  2. Japanese Indigo Polygonum tinctorium also called: Persicaria tinctoria
  3. An Impartation of Color: Japanese Indigo (Polygonum tinctorium) – leaves
  4. "Dye seeds Japanese indigo, Polygonum tinctorium". Archived from the original on 2023-06-05. Retrieved 2023-08-23. [...] Japanese indigo or dyer's knotweed is a plant that contains indigo precursors in the green leaves.
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