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Kobresia sibirica
''Kobresia sibirica'', the Siberian bog sedge, is a plant species known from arctic and alpine tundra in Siberia, the Russian Far East, Alaska, Yukon, the Canadian Northwest Territories, Nunavut, British Columbia, Colorado (several counties in the Rockies), Utah (Duchesne County), Montana (Carbon County), and Wyoming (Park County). Some authorities have considered the North American collections as distinct species (''K. macrocarpa'', described from Colorado,〔(Clokey, Ira Waddell, ex Mackenzie, Kenneth Kent. 1931. North American Flora 18(1): 5. ) 〕 and ''K. hyperborea'' from the Canadian Arctic),〔Porsild, Alf Erling. 1951. Bulletin of the National Museum of Canada 121: 103.〕 but they are more often tentatively regarded as conspecific with ''K. siberica'' pending further investigation.〔(Flora of North America v 23 p 253. ''Kobresia sibirica'' )〕〔(BONAP (Biota of North America Program) floristic synthesis, ''Kobresia sibirica'' )〕〔Tolmatchev, A. I. 1966. Cyperaceae. Arkticheskaia Flora SSSR 3: 1–176. 〕〔Czerepanov, S. K. 1981. Sosudistye Rasteniia SSSR 509 pages. Nauka, Leningradskoe Otd-nie, Leningrad. 〕
''Kobresia sibirica'' is a perennial herb spreading by means of underground rhizomes. Culms are up to 40 cm tall. Leaves are narrow and thread-like, up to 15 cm long. Lower spikelets generally have both pistillate and staminate flowers, while uppermost spikelets are staminate only.〔〔(photo of herbarium specimen at Missouri Botanical Garden, isotype of ''Kobresia macrocarpa'' (synonym of ''Kobresia sibirica'') collected in Colorado )〕〔Turczaninow, Nicolai Stepanowitsch, in Ledebour, Carl (Karl) Friedrich von. 1852. Flora Rossica 4(13): 262.〕〔(Boeckeler, Johann Otto. 1875. Linnaea 39: 7. ) 〕〔Cody, W. J. 1996. Flora of the Yukon Territory i–xvii, 1–669. NRC Research Press, Ottawa. 〕〔Welsh, S. L. 1974. Anderson's Flora of Alaska and Adjacent Parts of Canada i–xvi, 1–724. Brigham Young University Press, Provo. 〕
==References==
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