| Family | Marantaceae |
| Scientific name | Thalia dealbata Fraser ex Roscoe |
| Synonyms | Thalia barbata Small |
| Common name | (Japanese common name) mizu-kanna [water Canna] |
| (English common name) Hardy Canna, Hardy water Canna, powdery alligator-flag, powdery thalia | |
| Distribution | (Japan) Honshu (west of Kanto region), Shikoku, Kyushu |
| (Other nations) [native] USA | |
| Chromosomal number | 2n=12 |
| Description | Plants 1-2m, Flowers purple, flowering in July to August. Perennial plants. |
| Reference | Thalia dealbata Fraser ex Roscoe |
| Thalia dealbata Fraser ex Roscoe | |
| Thalia dealbata Fraser | |
| Note | Occasionally naturalized. Mainly cultivated. |
| August 2007 at Koishikawa Botanical Garden |
August 2007 at Koishikawa Botanical Garden |
August 2007 at Koishikawa Botanical Garden |
| August 2007 at Koishikawa Botanical Garden |