| Family | Melanthiaceae (also placed in Liliaceae) |
| Tribe | Heloniadeae |
| Scientific name | Heloniopsis leucantha (Koidzumi) Honda |
| Synonyms | Helonias leucantha (Koidzumi) N. Tanaka; Hexonix leucantha (Koidzumi) F.T. Wang & Tang; Sugerokia leucantha Koidzumi |
| Common name | (Japanese common name) oh-shiro shoujo-bakama (オオシロショウジョウバカマ, 大白猩猩袴 [meaning: large white shoujo-bakama, shoujo-bakama = Heloniopsis orientalis (Thunberg) C. Tanaka]) |
| (English common name) none | |
| Distribution | (Japan) Kyushu (Tokushoshima Island), Okinawa |
| (Other nations) none | |
| Habitat | Mountane streamside wet slope |
| Chromosomal number | 2n=34 |
| Description | Leaves 8-17, 10-25cm long. Evergreen. Scapes 7~27cm long. Flowers 7-20, white perianths 15-20mm long, flowering in January to February. Perennial plants. |
| References | Heloniopsis leucantha Honda |
| Vascular floral anatomy of the east asian Heloniopsis orientalis (Thunb.) C. Tanaka | |
| Note | Endemic to Japan. |
| January 2011 at my home |
January 2011 at my home |
January 2011 at my home |
| March 2011 at my home |
| March 2011 at my home |