| Family | Fabaceae (alt. Leguminosae) |
| Subfamily | Faboideae |
| Tribe | Phaseoleae |
| Subtribe | Glycininae |
| Scientific name | Dumasia truncata Siebold & Zuccarini |
| Synonyms | none |
| Common name | (Japanese common name) no-sasage (ノササゲ, 野大角豆 [meaning: wild cowbean]) |
| (English common name) none | |
| Distribution | (Japan) Honshu, Shikoku, Kyushu |
| (Other nations) none | |
| Habitat | Mountane forest edge |
| Chromosomal number | unknown |
| Description | Leaves ternate, leaflets each 3-8cm long, 2-4cm wide. Flowers yellow 15-18mm long, flowering in August to September. Fruits 4-5cm long, 7-8mm wide. Vine. Pelennial plants. |
| Reference | Dumasia truncata Siebold & Zucc. |
| July 2007 at lowland forest edge |
July 2007 at lowland forest edge |
July 2007 at lowland forest edge |
| July 2007 at lowland forest edge |
July 2007 at lowland forest edge |
| September 2006 at lowland forest edge |
September 2006 at lowland forest edge |