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Carex disperma is a species of sedge known by the common names softleaf sedge or two-seed sedge. It is native to much of the northern Northern Hemisphere, from Alaska to Greenland, most of Canada and the contiguous United States, and across Eurasia.

Carex vallicola is a species of sedge known by the common name valley sedge. It is native to western North America from British Columbia to New Mexico, where it grows in many types of moist and dry habitat, including forest and grassland. This sedge produces clumps of stems up to about 60 centimeters tall. The inflorescence is a crowded cluster of a few flower spikes. The fruit is enclosed in a brown perigynium.

Carex barbarae is a species of sedge known as Santa Barbara sedge.

Carex nebrascensis is a species of sedge commonly known as Nebraska sedge.

Carex emoryi, the riverbank tussock sedge or Emory's sedge, is a species of sedge native to Canada, the United States, and the states of Chihuahua and Coahuila in northern Mexico. It grows along the banks of rivers and streams. It also occurs on sand and gravel bars in streams. It spreads by means of underground rhizomes. Carex emoryi is sometimes planted in retention ponds for erosion prevention and maintenance reduction along shorelines.

Carex spectabilis is a species of sedge known by the common name showy sedge.

Carex raynoldsii is a species of sedge known by the common name Raynolds' sedge. It is native to western North America and grows in alpine to subalpine meadows.

Carex petasata is a species of sedge known by the common name Liddon sedge.

Carex hitchcockiana, common name Hitchcock's sedge, is a Carex species that is native to North America. It is listed as endangered in Maryland, as threatened in New York and Tennessee, and as a species of special concern in Connecticut and Massachusetts.

Carex careyana, commonly known as Carey's sedge, is a species of sedge found in the eastern United States and Ontario, Canada. It is named in honour of John Carey. Its natural habitat is nutrient-rich moist forests, often on rocky calcareous slopes, and around outcrops such as caves or sinkholes. It is a conservative species, only being found in intact natural communities. It can be distinguished from other Carex in section Careyanae by its combination of purple leaf bases, broad basal leaves, long leaf-like bracts on the culm, and relatively large perigynia. It produces flowers and fruits in

Carex blanda, the common woodland sedge or eastern woodland sedge, is a species of sedge native to a wide variety of habitats in the eastern and central United States and Canada. Its leaves are 1–10 mm (1⁄32–13⁄32 in) wide and 14–36 cm (5.5–14.2 in) long. The stem usually has a staminate (male) spike at the tip, two pistillate (female) spikes closely clustered near it, as well as another pistillate spike lower down. The pistillate spikes have 4 to 36 perigynia each, which develop into seeds (achenes). Carex blanda is rather common in its native range, and tends to spread aggressively,

Carex woodii, known as pretty sedge, is a species of sedge native to North America.

Carex trisperma, the three-seeded sedge, is a species of flowering plant in the genus Carex, native to Canada, Greenland, and the northeastern United States. It is typically found in acidic bogs within forests.

Carex lupuliformis, common name false hop sedge, is a perennial sedge of sporadic distribution found in the floodplain forests and ephemeral woodland ponds of central and eastern North America. The species typically produces four to seven leaves with sheaths of distal leaves of 3 to 21 cm whose ligules are rounded to triangular. Carex lupuliformis blooms between early June and early October, typically with "two to six proximal female spikes, distal spikes usually crowded, ascending, densely flowered, usually cylindric, much longer than broad; one to two terminal male spikes." Fruiting occurs

Carex houghtoniana, also known as Houghton's sedge, is a species of flowering plant in the sedge family, Cyperaceae. It is native to eastern Canada and the northeastern United States.

Carex haydenii (common name, Hayden's sedge), is a species of flowering plant in the family Cyperaceae, native to eastern Canada and the north-central and northeastern United States. Preferring to grow in wet, shady situations, but able to tolerate full sun, it is recommended for rain gardens.

Carex formosa, also known as handsome sedge, is a species of sedge native to North America. It is listed as an endangered species in the US states of Minnesota, New Jersey, and Pennsylvania, as threatened in Connecticut, Massachusetts, New York, and Wisconsin, and as presumed extirpated in Ohio.

Carex flaccosperma, the blue wood sedge, is a species of flowering plant in the family Cyperaceae, native to the south-central and southeastern US. Preferring to grow in wet, shady situations and deer resistant, it is recommended for shady areas in rain gardens.

Carex exilis, common name coastal sedge or meager sedge, is a species of grass-like plant in the Cyperaceae family. It is native to North America and Canada, with several disjunct populations from southern Canada to the Gulf Coast.

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Carex tenera, known as quill sedge, is a species of sedge native to the northern United States and Canada. Two varieties are recognized in Flora of North America: C. tenera var. tenera C. tenera var. echinodes (= Carex echinodes (Fernald) P.Rothr., Reznicek & Hipp)

Carex siccata, common names including dryspike sedge, is a species of Carex native to North America. It is listed as endangered in New Jersey. As of May 2021, USDA Plants regards Carex foenea as a synonym of C. siccata, whereas the World Checklist of Selected Plant Families regards only two varieties of C. foenea as synonyms, treating C. foenea itself as a separate species.

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Carex petricosa, also known as the rock-dwelling sedge, is a flowering plant native to Alaska, western Canada, Montana, and Quebec.

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Carex tenax, the wire sedge, is a species of flowering plant in the family Cyperaceae, native to Texas and the southeastern United States.

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