| Family | Cyperaceae |
| Scientific name | Carex siderosticta Hance |
| Synonyms | none |
| Common name | (Japanese common name) tagane-sou [graver weed] |
| (English common name) Japanese sedge, creeping broad-leaf sedge | |
| Distribution | (Japan) Hokkaido, Honshu, Shikoku, Kyushu |
| (Other nations) Korea | |
| Chromosomal number | 2n=12, 24 |
| Description | Flowers flowering in April to May. |
| Reference | Carex siderosticta Hance |
| Note | Common |
| May 2006 at mountane forest | May 2006 at mountane forest | May 2006 at mountane forest |
| May 2006 at mountane forest | May 2006 at mountane forest | April 2006 at mountane forest |