Lewis David de Schweinitz

Carex bigelowii is a species of sedge known by the common names Bigelow's sedge, Gwanmo sedge, and stiff sedge. It has an Arctic–alpine distribution in Eurasia and North America, and grows up to 50 centimetres (20 in) tall in a variety of habitats.

Carex muskingumensis is a species of sedge known by the common names Muskingum sedge and palm sedge. It is native primarily to the Midwestern United States where it is found in wet areas such as swamps, low woods, and sedge meadows. It is a fairly conservative species, usually being found in areas where native vegetation is intact.

Carex jamesii, known as James's sedge or grass sedge, is a species of sedge native to North America from Minnesota east to New York and south to Oklahoma and South Carolina. It occurs in mesic hardwood forests and produces fruits from early May to mid July. It has two to four perigynia that are subtended by leaf-like pistillate scales. Its seeds are dispersed by ants. Within the genus Carex, Carex jamesii is in the section Phyllostachyae (sometimes Phyllostachys) and is most closely related to C. juniperorum.

Carex laxiculmis, the creeping sedge, is a species of flowering plant in the family Cyperaceae, native to Ontario, Canada, and the central and eastern United States. As with most species of sedge, it prefers to grow in shady, wet areas. Its cultivar 'Hobb', sold under the trade designation Bunny Blue, is available from commercial nurseries.

Carex cherokeensis, commonly called Cherokee sedge, is a species of flowering plant in the sedge family (Cyperaceae). It is native to the United States where it is found in the Southeast. Its natural habitat is in high-nutrient, often calcareous soil, in bottomland forests, mesic forests, and wet meadows. Carex cherokeensis is a rhizomatous perennial graminoid. It has drooping spikes which are 8–9 mm thick. Its perigynium beaks are papery and fragile. It produces fruits in late spring and early summer.

Carex barrattii is a species of sedge known as Barratt's sedge. It is endemic to the United States, where it occurs on the Atlantic Coastal Plain from Connecticut south to Georgia and Alabama. It also occurs in the southern Appalachians. This sedge has stems growing 20 to 90 centimeters tall. The leaves are a few millimeters wide and pale blue-green in color. The plant produces dark purple flower spikes, but flowering occurs rarely. The plant reproduces vegetatively via rhizome. This plant grows on wet streambanks and savannas, and in pine barrens. It is not uncommon in the Pine Barrens of

Carex albolutescens, known as greenish-white sedge or greenwhite sedge is a species of sedge native primarily to the lower Midwest and Eastern United States. C. albolutescens grows in wetlands, with an affinity toward acidic soils in swamps and woodlands.

Monotropsis odorata, commonly known as Appalachian pigmy pipes, is a species of flowering plant in the genus Monotropsis, part of heath family.

Carex retrorsa, (commonly known as knotsheath sedge, deflexed bottlebrush sedge, or retrorse sedge), is a widespread species of flowering plant in the family Cyperaceae, native to southern Canada and the northern United States.

Carex nigromarginata, also known as black edge sedge, is a North American sedge which grows on acid soils in dry woodland, thickets, and roadside, and similar ruderal habitats in partial shade or in full sun, often near streams at elevations of 10–800 m (33–2,625 ft). The plants grow in dense clumps, often forming circular patterns on forest floors or roadsides. 2n = 36.

Carex gynandra, also known as nodding sedge, is a species of flowering plant in the sedge family, Cyperaceae. It is native to eastern Canada and the United States.

Carex gracillima, called the graceful sedge or purple-sheathed graceful sedge, is a species of flowering plant in the genus Carex, native to central and eastern Canada and the central and eastern United States. It prefers to grow in shady, wet woodlands and similar habitats.

Carex deweyana Dewey's sedge, short-scale sedge, is a species of sedge native to Canada and the United States.

Carex davisii, known as Davis' sedge or awned graceful sedge, is a species of Carex native to North America. It is listed as an endangered, threatened, or species of concern across much of edge of its range. It was named in the 1820s by Lewis David de Schweinitz and John Torrey in honor of Emerson Davis (1798–1866), a Massachusetts educator and "enthusiastic student of the genus" Carex.

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Carex schweinitzii, common name Schweinitz's sedge, is a Carex species native to North America. It is a perennial.

Carex scabrata, the eastern rough sedge, is a species of flowering plant in the family Cyperaceae. It is native to eastern Canada and the eastern United States (but in the southeast it is confined to the Appalachians), with one collection each in the Ozark and Ouachita Mountains. A perennial reaching 90 cm (3 ft), it is found it wet areas with rich soils, particularly on seepage slopes.

Carex novae-angliae, the New England sedge, is a Carex species that is native to North America.

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Viola eriocarpa (syn. Viola pubescens var. scabriuscula), the smooth yellow violet, is a species of flowering plant in the family Violaceae. It is native to Canada and the United States east of the Rockies. A perennial of forests, it prefers very rich soils. It is extremely difficult to distinguish from Viola pubescens unless both are examined together.

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