| Family | Triuridaceae |
| Scientific name | Sciaphila secundiflora Thwaites ex Bentham |
| Synonyms | Sciaphila boninensis Tuyama; Sciaphila megastyla Fukuyama & T. Suzuki; Sciaphila tosaensis Makino |
| Common name | (Japanese common name) uematsu-sou (ウエマツソウ, 植松草 [meaning: Mr. Uematsu's weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (west of Central region), Ogasawara Islands, Shikoku, Kyushu, Okinawa |
| (Other nations) China (Hong Kong), Taiwan, Thailand, Malaysia, Papua New Guinea, Pacific Islands, Sri Lanka | |
| Habitat | Mountane forest |
| Chromosomal number | unknown |
| Description | Plants 6-10cm tall. Leaves 3mm long. Flowers dark purple inflorescences 1-4cm long, flowering in July to September. Fruits ca. 2mm across. Saprophytes. |
| Reference | Sciaphila secundiflora Thwaites ex Benth. |
| Sciaphila secundiflora Thwaites ex Bentham | |
| Sciaphila tosaensis Makino | |
| A New Treatment in Säaphila (Triuridaceac) in Taiwan and Japan | |
| Revision of Sciaphila (Triuridaceae) in Taiwan | |
| A Revision of Triuridaceae of Japan | |
| The Genus Sciaphila Blume (Triuridaceae) in the Flora of Vietnam | |
| Identification of a mycorrhizal fungus in the roots of achlorophyllous Sciaphila tosaensis Makino (Triuridaceae) | |
| Note | Rare species. |
| September 2009 at mountane forest in Wakayama Prefecture |
September 2009 at mountane forest in Wakayama Prefecture |
September 2009 at mountane forest in Wakayama Prefecture |
| September 2009 at mountane forest in Wakayama Prefecture |
September 2009 at mountane forest in Wakayama Prefecture |