Flora of the Canadian Arctic Archipelago

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S.G. Aiken, M.J. Dallwitz, L.L. Consaul, C.L. McJannet, R.L. Boles, G.W. Argus, J.M. Gillett, P.J. Scott, R. Elven, M.C. LeBlanc, L.J. Gillespie, A.K. Brysting, H. Solstad, and J.G. Harris

Carex obtusata Liljeb.

Cyperaceae, Sedge family.

Published in Kongl. Vetensk. Acad. Nya Handl. 14: 69. 1793.

Type: Described from Sweden: Öland.

Vegetative morphology. Plants perennial herbs. Only fibrous roots present. Leaves marcescent. Petioles absent. Sheaths present; sheath collars absent. Ligules present. Leaf blades simple. Leaves grass-like. Blades linear. Blades not lobed. Blade margins entire. Hydathodes absent.

Reproductive morphology. Plants monoecious. Stamens present (staminate flowers), or absent (pistillate flowers); 3. Ovary syncarpous. Placentation basal. Ovules per ovary 1. Fruit surrounded by a perigynium. Fruit indehiscent.

Chromosome information. 2n = 52.

2n = 52. Zhukova and Petrovsky (1971, Wrangel Island; 1977); Dawe and Murray, in Löve (1981a, southern Alaska); Löve (1981d, central Canada); Petrovsky and Zhukova (1983, northeastern Asia).

Ecology and habitat. Substrates: hummocks (and dry gravelly places).

North American distribution. Alaska, Yukon, continental Northwest Territories.

Northern hemisphere distribution. Cordilleran, or Siberian (also reaching eastern Europe). Kanin–Pechora, Polar Ural – Novaya Zemlya, Anabar–Olenyok, Kharaulakh, Yana–Kolyma, West Chukotka, Wrangel Island, South Chukotka, East Chukotka, West Alaska, North Alaska – Yukon, Central Canada.

General notes. Mentioned in Porsild (1957) as a species whose distribution comes close to the Arctic Archipelago. It is mainly a boreal species, although it appears to occur on gravel further north. There are a few other species in the same category, e.g., C. concinna, C. mackenziei, C. rotundata (in northern Quebec), mapped by Porsild and Cody (1980).


This publication is available on the internet (posted May 2011) and on CD-ROM (published in 2007). These versions are identical in content, except that the errata page for CD-ROM is accessible on the main index page of the web version.

Recommended citation for the web-based version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. NRC Research Press, National Research Council of Canada, Ottawa. http://nature.ca/aaflora/data, accessed on DATE.

Recommended citation for the CD-ROM version of this publication: Aiken, S.G., Dallwitz, M.J., Consaul, L.L., McJannet, C.L., Boles, R.L., Argus, G.W., Gillett, J.M., Scott, P.J., Elven, R., LeBlanc, M.C., Gillespie, L.J., Brysting, A.K., Solstad, H., and Harris, J.G. 2007. Flora of the Canadian Arctic Archipelago: Descriptions, Illustrations, Identification, and Information Retrieval. [CD-ROM] NRC Research Press, National Research Council of Canada, Ottawa.

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