| Family | Pontederiaceae |
| Scientific name | Eichhornia azurea (Swartz) Kunth |
| Synonyms | Eichhornia aquatica (Vellozo) Schlechtendal; Piaropus azureus (Swartz) Rafinesque; Pontederia aquatica Vellozo; Pontederia azurea Swartz |
| Common name | (English common name) anchored water hyacinth, rooted water hyacinth, peacock hyacinth, saw-petal water hyacinth |
| (Japanese common name) none | |
| Distribution | USA, Costa Rica, Guatemala, Honduras, Nicaragua, Panama, Jamaica, rench Guiana, Guyana, Suriname, Venezuela, Brazil, Bolivia, Colombia, Ecuador, Peru, Argentina, Paraguay |
| Reference | Eichhornia azurea (Sw.) Kunth |
| Eichhornia azurea (Sw.) Kunth |
| January 2007 at Tsukuba Botanical Garden |
January 2007 at Tsukuba Botanical Garden |
January 2007 at Tsukuba Botanical Garden |