| Family | Melanthiaceae (also placed in Liliaceae) |
| Scientific name | Kinugasa japonica (Franchet & Savatier) Tatewaki & C. Sutô |
| Synonyms | Paris japonica (Franchet & Savatier) Franchet |
| Common name | (Japanese common name) kinugasa-sou (キヌガサソウ, 衣笠草 [meaning: silk umbrella weed]) |
| (English common name) none | |
| Distribution | (Japan) Honshu (north of Central region) |
| (Other nations) none | |
| Habitat | Alpine wet field |
| Chromosomal number | 2n=40 (8x) |
| Description | Plants electing 35-75cm tall. Leaves 7-10 verticillate, leaflets each 15-25cm long. Flowers single, pedicels 3.5-7cm long, 7-9 outer perianths each 2.5-3cm long, inner perianths 10-15mm long, stamens many 10-13mm long, flowering in May to August. Fruits ca. 2mm long. Perennial plants. |
| Note | Endemic to Japan. |
| July 2008 at Alpine Botanical Garden in Yuzawa Highland |