| Family | Orchidaceae |
| Subfamily | Orchidoideae |
| Tribe | Cranichideae |
| Subtribe | Goodyerinae |
| Scientific name | Kuhlhasseltia nakaiana (F. Maekawa) Ormerod |
| Synonyms | Vexillabium boreale F. Maekawa; Vexillabium fissum F. Maekawa; Vexillabium inamii Ohwi; Vexillabium nakaianum F. Maekawa; Vexillabium yakushimense (Tamamoto) F. Maekawa var. nakaianum (F. Maekawa) T. B. Lee |
| Common name | (Japanese common name) hau-un-ran (ハクウンラン, 白雲蘭 [meaning: Mt. Haku-un orchid]), oh-hau-un-ran (オオハクウンラン, 大白雲蘭 [meaning: large Mt. haku-un orchid]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Ogasawara Island, Kyushu (Ohita Prefecture) |
| (Other nations) Korea | |
| Habitat | Mountane wet forest. |
| Chromosomal number | 2n=26 |
| Description | Plants electing 8-13cm tall (including inflorescences). Leaves 5-13mm long, 5-12mm wide. Flowers white lips 4-5mm wide, flowerting in July to August. Terrestrial. Perennial plants. |
| Reference | Kuhlhasseltia nakaiana (F.Maek.) Ormerod |
| Vexillabium fissum F. Maek. | |
| Note | Rare species. |
| Photos below at Mr. Mitsuhashi's green house are those of an orchd which was cultivated by Mr. Shunji Mitsuhashi in his green house. |
| July 2009 at Mr. Mitsuhashi's green hause |
July 2009 at Mr. Mitsuhashi's green hause |
| September 2009 at subalpine forest |
September 2009 at subalpine forest |
September 2009 at subalpine forest |
| September 2009 at subalpine forest |