Carex filifolia

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 filifolia
Varietates: C. f. var. erostrata – C. f. var. filifolia
Name

Carex filifolia Nutt., Gen. N. Amer. Pl. 2: 204 (1818).
Synonyms

Homotypic
Olotrema filifolia (Nutt.) Raf., Good Book: 25 (1840).
Uncinia filifolia (Nutt.) Nees in M.A.P.zu Wied-Neuwied, Reise Nord-America 2: 450 (1841).

Distribution
Native distribution areas:

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

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

Nuttall, T. 1818. The genera of North American plants, and a catalogue of the species, to the year 1817. Volume 2. 245 + 10 pp., D. Heartt, Philadelphia. BHL Reference page. : 2: 204.

Links

Govaerts, R. et al. 2020. Carex filifolia in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Jan 18. Reference page. 
International Plant Names Index. 2020. Carex filifolia. Published online. Accessed: Jan 18 2020.
Govaerts, R. et al. 2020. Carex filifolia in Kew Science Plants of the World Online. The Board of Trustees of the Royal Botanic Gardens, Kew. Published online. Accessed: 2020 Jan 18. Reference page. 
Tropicos.org 2020. Carex filifolia. Missouri Botanical Garden. Published online. Accessed: 18 Jan 2020.
USDA, ARS, Germplasm Resources Information Network. Carex filifolia in the Germplasm Resources Information Network (GRIN), U.S. Department of Agriculture Agricultural Research Service. Accessed: 08-Apr-12.

Vernacular names
English: threadleaf sedge

Carex filifolia is a species of sedge known by the common name threadleaf sedge. It is native to western North America and grows on slopes, eroded areas, gravel, and dry habitats.[1]

Description

Carex filifolia produces clumps of stems which are rounded or triangular, wiry, and angled or curved, reaching up to about 35 centimeters long. The root network is extensive and it forms sod.[2] The leaves are narrow and rolled tightly, appearing quill-like.

The inflorescence is up to 3 centimeters long and has flowers coated with reddish scales. The fruit is covered in a sac called a perigynium which is somewhat hairy. The plant produces some seeds, but mainly reproduces vegetatively.
Distribution and habitat

This sedge is native to much of western North America, from Alaska to California and Manitoba to New Mexico, where it grows in moist and dry habitat.
References

"Lady Bird Johnson Wildflower Center - The University of Texas at Austin". www.wildflower.org. Retrieved 2022-04-01.
"Carex filifolia". www.fs.fed.us.