| Family | Agavaceae (also placed in Liliaceae) |
| Scientific name | Hosta sieboldii (Paxton) J. W. Ingram |
| Synonyms | Funkia lancifolia Sprengel; Funkia marginata Hooker; Hosta albo-marginata (Hooker) Ohwi; Hosta lancifolia Engler; Hosta longissima Honda; Hosta lancifolia Engler var. angustifolia; Hosta japonica Honda |
| Common name | (Japanese common name) koba-giboushi (コバギボウシ, 小葉擬宝珠 [narrow leaved giboushi (giboushi = a traditional metal ornament of bridges)]) |
| (English common name) narrow leaved plantain lily | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) none | |
| Habitat | Swamp or mountane wet field |
| Chromosomal number | 2n=60 |
| Description | Scapes 30-40cm tall. Flowers white or pale blue flowers 4-5cm long, flowering in July to August. Perennial plants |
| Reference | Hosta sieboldii (Paxton) J. W. Ingram |
| Augst 2006 at Mt. Tsukuba |
Augst 2006 at Mt. Tsukuba |
Augst 2006 at Mt. Tsukuba |
| Augst 2006 at Mt. Tsukuba |
Augst 2006 at Mt. Tsukuba |
| Augst 2006 at Mt. Tsukuba |
Augst 2006 at Mt. Tsukuba |
Augst 2006 at Mt. Tsukuba |