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Classification System: APG IV

Superregnum: Eukaryota
Regnum: Plantae
Cladus: Angiosperms
Cladus: Monocots
Cladus: Commelinids
Ordo: Poales

Familia: Cyperaceae
Subfamilia: Cyperoideae
Tribus: Cariceae
Genus: Carex
Species: Carex rossii

Carex rossii Boott in W.J.Hooker, Fl. Bor.-Amer. 2: 222 (1839).

Carex novae-angliae var. rossii (Boott) L.H.Bailey, Bot. Gaz. 10: 207 (1885).
Carex deflexa var. rossii (Boott) L.H.Bailey, Mem. Torrey Bot. Club 1: 43 (1889).
Carex brevipes S.Watson in S.Watson & al., Bot. California 2: 246 (1880), not validly publ.
Carex globosa var. brevipes W.Boott in S.Watson & al., Bot. California 2: 485 (1880).
Carex deflexa var. media L.H.Bailey, Mem. Torrey Bot. Club 1: 43 (1889).
Carex pilulifera var. novae-angliae Kurtz, Bot. Jahrb. Syst. 19: 419 (1894).
Carex deflexa var. farwellii Britton in N.L.Britton & A.Brown, Ill. Fl. N. U.S. 1: 334 (1896).
Carex rossii var. brevipes (W.Boott) Kük. in H.G.A.Engler (ed.), Pflanzenr., IV, 20(38): 452 (1909).
Carex farwellii Mack., Bull. Torrey Bot. Club 37: 244 (1910).
Carex diversistylis A.Roach, Madroño 11: 277 (1952).

Native distribution areas:

Continental: Northern America
Alaska, Alberta, Arizona, British Columbia, California, Colorado, Idaho, Manitoba, Michigan, Minnesota, Montana, Nebraska, Nevada, New Mexico, Northwest Territorie, Ontario, Oregon, Saskatchewan, South Dakota, Utah, Washington, Wyoming, Yukon

References: Brummitt, R.K. 2001. TDWG – World Geographical Scheme for Recording Plant Distributions, 2nd Edition

Primary references

Boott, M.B. in W. J. Hooker 1839. Flora Boreali-Americana 2: 222.


Govaerts, R. et al. 2020. Carex rossii in World Checklist of Selected Plant Families. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Feb 02. Reference page.
International Plant Names Index. 2020. Carex rossii. Published online. Accessed: Feb 02 2020.
Govaerts, R. et al. 2020. Carex rossii in Kew Science Plants of the World online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published on the internet. Accessed: 2020 Feb 02. Reference page. 2020. Carex rossii. Missouri Botanical Garden. Published on the internet. Accessed: 2020 Feb 02.
USDA, ARS, Germplasm Resources Information Network. Carex rossii in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 13 Aug 2006.

Vernacular names
English: Ross' sedge, Ross' Sedge, Short Sedge
français: Carex de Ross

Carex rossii, commonly known as Ross's sedge, is a hardy species of sedge that is often a pioneer species in areas with little or no established vegetation, or in places where disturbance has occurred. Ross's sedge grows in a variety of habitats throughout much of western North America, from Alaska to Ontario, south to New Mexico and California. It flowers in May and June.[3][4][5]


Carex rossii was first described by Francis Boott in Hooker's Flora Boreali-Americana (1839). The type locality was listed as "Hab. N. W. Coast. Douglas. Rocky Mountains. Drummond" (sic)".[6]

Carex rossii produces a dense clump, or solid mat of slender stems up to about 40 centimetres (16 in) from a shallow network of rhizomes. The pale to dark green leaves are usually longer than the stems. The inflorescences contain one or more staminate flower spikes above more rounded pistillate spikes. The fruit is three-sided, and covered in a greenish or brownish perigynium.[3][4]
Distribution and habitat

Carex rossii is native to, and sometimes abundant in, Alaska and subarctic Canada (Nunavut, Northwest Territories, and Yukon Territory); western Canada (Alberta, British Columbia, Manitoba, and Saskatchewan); and the contiguous U.S. (Arizona, California, Colorado, the Dakotas, Idaho, Minnesota, Montana, Nevada, New Mexico, Oregon, Utah, Washington, and Wyoming.) It is found only sporadically in Ontario, Michigan, and Nebraska.[2][3][7]

It grows in many habitat types, including wet and dry areas in forest, sagebrush, prairie, and alpine meadows.[3][4][8]


"Name - Carex rossii Boott synonyms". Tropicos. Saint Louis, Missouri: Missouri Botanical Garden. Retrieved August 23, 2010.
"Profile for Carex rossii (Ross' sedge)". PLANTS Database. USDA, NRCS. Retrieved August 2, 2010.
Anderson, Michelle D. (2008). "Carex rossii". Fire Effects Information System (online). Rocky Mountain Research Station, Fire Sciences Laboratory (Producer): U.S.D.A; Forest Service. Retrieved August 23, 2010.
Raymond Cranfill (1993). "Jepson Manual treatment for CAREX rossii". Jepson Manual Online. University & Jepson Herbaria; Regents of the University of California. Retrieved August 24, 2010.
Flora of North America: Carex rossii
"Plant Name Details for Carex rossii". IPNI. Retrieved August 23, 2010.
"Carex rossii". Germplasm Resources Information Network (GRIN). Agricultural Research Service (ARS), United States Department of Agriculture (USDA). Retrieved August 23, 2010.
Calflora: Carex rossii (Ross sedge)

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