| Family | Iridaceae |
| Subfamily | Iridoideae |
| Tribe | Irideae |
| Scientific name | Iris pseudacorus L. |
| Synonyms | Iris acoriformis Boreau; Iris acoroides Spach; Iris bastardi Boreau; Iris curtopetala D. Delaroche; Iris flava Tornabene; Iris lutea Lamarck; Iris paludosa Persoon; Iris pseudacorus L. var. parviflora Bastard; Iris sativa Miller |
| Common name | (Japanese common name) ki-shobu (キショウブ, 黄菖蒲 [meaning: yellow iris]) |
| (English common name) pale-yellow iris, water flag, yellow flag, yellow iris, yellow water iris | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) [native] Russia, Caucasus, Iran, Syria, Turkey, Europe, Algeria, Morocco | |
| Habitat | Swamp, riverside, wet fields |
| Chromosomal number | 2n=24, 30, 32, 34 |
| Description | Leaves 0.5-1.2m long. Scapes 0.5-1m tall. Flowers yellow ca. 10cm across, inner perianths very small, , flowering in May to June. Perennial plants. |
| Reference | Iris pseudacorus L. |
| Iris pseudacorus Linnaeus | |
| Iris pseudacorus L. | |
| Method for building up defined phosphate deposits from waste phosphates (US Patent 4331538/1982) | |
| Solar aquatic apparatus for treating waste (US Patent 5087353/1992) | |
| Method for treating water (US Patent 5389257/1995) | |
| Cosmetic or pharmaceutical compositions containing, as active ingredient, mangiferine or its derivatives, in pure form or in plant extracts (US Patent 5824320/1998) | |
| Constructed wetlands remediation system (US Patent 6159371/2000) | |
| System for removing pollutants from water (US Patent 6200469/2001) | |
| Method for removing pollutants from water (US Patent 6406627/2002) | |
| System and method for removing pollutants from water (US Patent 6652743/2003) | |
| Note | Naturalized plants (introduce as garden plants in 19th). |
| May 2007 near rice paddy |
May 2007 near rice paddy |
May 2007 near rice paddy |