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Carex amphibola
	Closeup of the perigynia
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Clade:	Commelinids
Order:	Poales
Family:	Cyperaceae
Genus:	Carex
Section:	Carex sect. Griseae
Species:	C. amphibola
Binomial name
	Carex amphibola; Steud.
Synonyms
	Carex grisea var. amphibola (Steud.) Kük. ; Carex grisea var. minor Olney ; Carex laxiflora Elliott, nom. illeg. ;

Carex amphibola, known as gray sedge,^[2] is a species of flowering plant in the family Cyperaceae.^[1] It was first formally named in 1855.^[3] Carex amphibola is native to the eastern United States and Canada.^[1]

Carex amphibola is commonly confused with Carex grisea, which has somewhat greener perigynia with more rounded tips, versus the gray-green coloring and angular tips of C. amphibola perigynia. The perigynia of C. amphibola are somewhat more clustered and spreading at maturity, while those of C. grisea are strongly ascending.^[2]

Carex amphibola grows in mesic deciduous forests, often in loamy areas near streams.^[4]

References

^ ^a ^b ^c ^d "Carex amphibola Steud". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 9 August 2020.
^ ^a ^b Wilhelm, Gerould; Rericha, Laura (2017). Flora of the Chicago Region: A Floristic and Ecological Synthesis. Indiana Academy of Sciences.
^ "Carex amphibola Steud". ipni.org. International Plant Names Index. Retrieved 9 August 2020.
^ Naczi, Robert F. C.; Bryson, Charles T. (2002). "Carex griseae". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 23. New York and Oxford: Oxford University Press. Retrieved 9 August 2020 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

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[powo-1] "Carex amphibola Steud". Plants of the World Online. Royal Botanical Gardens Kew. Retrieved 9 August 2020.

[fotcr2017-2] Wilhelm, Gerould; Rericha, Laura (2017). Flora of the Chicago Region: A Floristic and Ecological Synthesis. Indiana Academy of Sciences.

[ipni-3] "Carex amphibola Steud". ipni.org. International Plant Names Index. Retrieved 9 August 2020.

[fna-4] Naczi, Robert F. C.; Bryson, Charles T. (2002). "Carex griseae". In Flora of North America Editorial Committee (ed.). Flora of North America North of Mexico (FNA). Vol. 23. New York and Oxford: Oxford University Press. Retrieved 9 August 2020 – via eFloras.org, Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA.

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