| Family | Orchidaceae |
| Subfamily | Cypripedioideae (also placed in Cypripediaceae) |
| Tribe | Cypripedieae |
| Subtribe | Cypripediinae |
| Scientific name | Cypripedium debile Reichenbach f. |
| Synonyms | Cypripedium cardiophyllum Franchet & Savatier |
| Common name | (Japanese common name) ko-atsumori-sou (コアツモリソウ, 小敦盛草 [meaning: tiny atsumori-sou (atsumori-sou = Cypripedium macranthos Swartz)]) |
| (English common name) none | |
| Distribution | (Japan) Hokkaido (Southwestern region), Honshu, Shikoku (Kochi Prefecture), Kyushu (Kumamoto Prefecture) |
| (Other nations) China, Taiwan | |
| Habitat | Wet forest |
| Chromosomal number | 2n=20 |
| Description | Plants 10-20cm tall. Leaves 2.5-5cm long, 2-5cm wide. Flowers pale yellow ca. 2cm, purple lip ca. 1cm, flowering in May to June. Terrestrial. Perennial plants. |
| Reference | Cypripedium debile Rchb. f. 1874 |
| Cypripedium debile Rchb. f. | |
| Note | Reratively rare species. |
| April 2008 at my home |
April 2008 at my home |
| March 2009 at my home |
April 2009 at my home |
April 2009 at my home |
| April 2009 at my home |