| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
|---|---|---|---|---|---|
| Cyperaceae | Eriophorum gracile | Slender Cottonsedge, Slender Cottongrass | Bogs and open swamps. | Circumboreal, in North America from NL (Labrador) west to AK, south to s. PA (Rhoads & Block 2007), s. NJ, w. MD (Maryland Wildlife and Heritage Service 2016), DE (McAvoy & Bennett 2001), c. OH, c. IN, IL, IA, NE, CO, UT, NV, and CA. |  |
| Cyperaceae | Eriophorum tenellum | Conifer Cottonsedge, Conifer Cottongrass | Bogs. | NL (Newfoundland) west to MN, south to s. NJ, se. PA (Rhoads & Block 2007), IL, and MI. |  |
| Cyperaceae | Eriophorum vaginatum var. spissum | Tussock Cottonsedge, Hare's-tail | Bogs, peaty swamps. | NL west to SK, south to n. NJ, e., n., and nw. PA, n. IN, WI, and MN. |  |
| Cyperaceae | Eriophorum virginicum | Tawny Cottonsedge, Tawny Cottongrass, Cat's-paw | Peaty sites, limited in habitat throughout the region, occurring in the Mountains in bogs and fens, in the Piedmont (formerly) in bogs, in the fall-line sandhills in frequently burned pocosins and sandhill seeps, in the middle and outer Coastal Plain in pocosins, acidic seeps, and peat-burn pools. | NL (Labrador) and NL (Newfoundland) west to ON and MN, south to se. NC, sw. NC, e. KY; disjunct in se. GA at Okefenokee Swamp. |  |
| Cyperaceae | Eriophorum viridicarinatum | Darkscale Cottonsedge, Darkscale Cottongrass | Bogs. | NL (Newfoundland and Labrador) west to AK, south to s. NJ, PA, OH, IN, IL, MN, ND, WY, ID, and WA; reported by Small (1933) for farther south, apparently in error. |  |
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