| Family | Orchidaceae |
| Subfamily | Epidendroideae |
| Tribe | Neottieae |
| Subtribe | Limodorinae |
| Scientific name | Epipactis thunbergii A. Gray |
| Synonyms | Epipactis gigantea Douglas ex Hooker var. manshurica Maximowicz ex Komarov; Epipactis thunbergii A. Gray var. manshurica (Maximowicz ex Komarov) T. Tang & F.T. Wang; Helleborine thunbergii (A. Gray) Druce; Limodorum thunbergii (A. Gray) Kuntze |
| Common name | (Japanese common name) kaki-ran (カキラン, 柿蘭 [meaning: persimmon orchid]) |
| (English common name) helleborine | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Russia (Amur River, Sakhalin, Kuril Islands), Korea, China | |
| Habitat | Wet field, swamp. |
| Chromosomal number | 2n=40 |
| Description | Plants electing 30-70cm tall. Leaves 6-13cm long, 3-5cm wide. Flowers yellow sepals ca. 12-15mm long, flowering in June to July. Terrestrial. Perennial plants. |
| Reference | Epipactis thunbergii A.Gray 1856 |
| Epipactis thunbergii A. Gray | |
| Japanese Orchid |
| June 2009 at my home |
June 2009 at my home |
June 2009 at my home |
| June 2010 at my home |
June 2010 at my home |
| June 2007 at Tsukuba Botanical Garden |
June 2007 at Tsukuba Botanical Garden |
| July 2008 at Karuizawa Botanical Garden |
July 2008 at Karuizawa Botanical Garden |
| April 2009 at my home |
May 2009 at my home |
June 2009 at my home |