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| May 2006 at mountane swamp | May 2006 at mountane swamp | May 2006 at mountane swamp |
| Family | Cyperaceae |
| Scientific name | Carex pruinosa Boott subsp. maximowiczii (Miquel) Kükenthal |
| Synonyms | Carex maximowiczii Miquel |
| Common name | (Japanese common name) gouso [gouso (meaning of gouso is unknown)] |
| (English common name) none | |
| Distribution | (Japan) Hokkaido, Honshu, Kyushu |
| (Other nations) Russia, Korea, China | |
| Chromosomal number | 2n=68, 74 |
| Description | Plants 30-60cm. Leaves 4-6mm width. Flowers male sikelet at top, female 2-4 spikelets each 2-3cm at side, flowering in May. Perennial plants. |
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| May 2006 at mountane swamp | May 2006 at mountane swamp | May 2006 at mountane swamp |
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| May 2006 at mountane swamp | May 2006 at mountane swamp | May 2006 at mountane swamp |
