| Family | Liliaceae |
| Subfamily | Calochortoideae |
| Scientific name | Tricyrtis ohsumiensis Masamune |
| Synonyms | Tricyrtis flava Maximovicz subsp. ohsumiensis (Masamune) Kitamura |
| Common name | (Japanese common name) takakuma-hototogisu (タカクマホトトギス, 高隈杜鵑 [meaning: Mt. Takakuma hototogisu (hototogisu = Tricyrtis hirta (Thunberg) Hooker])) |
| (English common name) none | |
| Distribution | (Japan) Kyushu (Kagoshima Prefecture) |
| (Other nations) none | |
| Habitat | Mountane forest or wet rock wall |
| Chromosomal number | 2n=26 |
| Description | Plants 20-100cm tall. Leaves ca. 8-15cm long, ca. 3-5cm wide. Flowers lemon yellow perianths each 35mm long, flowering in September to November. Perennial plants. |
| Reference | Tricyrtis ohsumiensis Masam. |
| A comparative floral and pollination biology of Tricyrtis flava maxim., T. nana yatabe and T. ohsumiensis | |
| Note | Endemic to Japan. |
| October 2009 at my home |
October 2009 at my home |