| Family | Cyperaceae |
| Scientific name | Carex capricornis Meinshausen ex Maximovicz |
| Synonyms | Carex capricornis Meinshausen ex Maximovicz var. capitata Meinshausen |
| Common name | (Japanese common name) joro-suge [prostitute sedge] |
| (English common name) none | |
| Distribution | (Japan) Honshu (Kanto region) |
| (Other nations) Russia, Korea, China | |
| Chromosomal number | 2n=70 |
| Description | Culms 40-70cm. Leaves 4-5mm width. Flowers male sikelets 1-3cm at top, female spikelets 1-2.5cm under male spikelet, flowering in May to July. Perennial plants. |
| Note | Rare species. |
| May 2007 at Ushiku Forest Park |
May 2007 at Ushiku Forest Park |
May 2007 at Ushiku Forest Park |