 |
 |
 |
|---|---|---|
| September 2007 at my home |
September 2007 at my home |
September 2007 at my home |
| Family | Polygonaceae |
| Subfamily | Polygonoideae |
| Scientific name | Persicaria tinctoria (Aiton) Spach |
| Synonyms | Persicaria tinctoria H. Gross; Polygonum tinctorium Aiton; Polygonum tinctorium Loureiro |
| Common name | (Japanese common name) ai (アイ, 藍 [meaning: indigo blue]), tade-ai (タデアイ, 蓼藍 [meaning: indigo blue tade (tade = Polygonaceae plants)]) |
| (English common name) Chinese indigo plant, Chinese indigo | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) [native] China | |
| Chromosomal number | 2n=40 |
| Description | Plants electing 50-80cm tall. Leaves 3-8cm long, 2-4cm wide. Flowers pink or white perianths each 2-3mm long, flowering in September to October. Perennial plants. |
| Reference | Persicaria tinctoria (Aiton) Spach |
| Polygonum tinctorium Aiton | |
| Physiologically active extract obtained from indigo plant polygonum tinctorium (US Patent 6524625/2003) | |
| Note | Cultivated (introduced from China in ancient era) and occasionally naturalized. |
| There are some variations of leaves form (willow leaves, round leaves etc.). Photos below are those of round leaved type Persicaria tinctoria. |
|
|
|
|---|---|---|
| September 2007 at my home |
September 2007 at my home |
September 2007 at my home |
 |
 |
 |
|---|---|---|
| September 2007 at my home |
September 2007 at my home |
September 2007 at my home |
