Carex douglasii

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 douglasii
Name

Carex douglasii Boott in W.J.Hooker, Fl. Bor.-Amer. 2: 213 (1839).
Synonyms

Heterotypic
Carex nuttallii Dewey, Amer. J. Sci. Arts 43: 93 (1842).
Carex meekii Dewey, Amer. J. Sci. Arts, ser. 2, 24: 48 (1857).
Carex douglasii var. densispicata Dewey, Amer. J. Sci. Arts, ser. 2, 32: 41 (1861).
Carex douglasii var. brunnea Olney in S.Watson, Botany [Fortieth Parallel]: 363 (1871).
Carex douglasii f. brunnea Olney in S.Watson, Botany [Fortieth Parallel]: 363 (1871).
Carex douglasii var. minor Olney in S.Watson, Botany [Fortieth Parallel]: 363 (1871).
Carex fendleriana Boeckeler, Linnaea 39: 135 (1875).
Carex douglasii var. laxiflora L.H.Bailey, Mem. Torrey Bot. Club 1(1): 20 (1889).
Carex usta L.H.Bailey, Mem. Torrey Bot. Club 1: 20 (1889).
Carex irrasa L.H.Bailey, Bot. Gaz. 25: 271 (1898).
Carex douglasii var. williamsii Rydb., Mem. New York Bot. Gard. 1: 82 (1900).

Distribution
Native distribution areas:

Continental: Northern America
Alberta, Arizona, British Columbia, California, Colorado, Idaho, Mexico Northwest, Missouri, Montana, Nebraska, Nevada, New Mexico, North Dakota, Oregon, Saskatchewan, South Dakota, Utah, Washington, Wyoming

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

Boott, M.B. in W.J.Hooker 1839. Flora Boreali-Americana 2: 213.

Links

Govaerts, R. et al. 2020. Carex douglasii in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Jan 17. Reference page. 
International Plant Names Index. 2020. Carex douglasii. Published online. Accessed: Jan 17 2020.
Govaerts, R. et al. 2020. Carex douglasii in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Jan 17. Reference page. 
Tropicos.org 2020. Carex douglasii. Missouri Botanical Garden. Published online. Accessed: 17 Jan 2020.
USDA, ARS, Germplasm Resources Information Network. Carex douglasii in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Vernacular names
English: Douglas' sedge

Carex douglasii is a species of sedge known by the common name Douglas' sedge.
Distribution

It is native to much of western North America, including the western Canadian provinces, the western United States, and Baja California. It grows in dry, wet, and seasonally moist habitat, from prairie and grassland to marshes. It is tolerant of sandy and alkaline substrates.
Description
Carex douglasii is a sedge producing triangular stems up to about 40 centimeters high from thin rhizomes. The leaves are thick but narrow and sometimes rolled. The plant is dioecious, with male and female flowers occurring on different individuals. The pistillate inflorescence is distinctive, with female flowers bearing long, protruding, persistent stigmas that tangle together into a wide mass.