| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Cyperaceae | Schoenoplectus acutus var. acutus | Hardstem Bulrush, Great Bulrush | Freshwater tidal marshes, calcareous spring marshes. | The species is widespread in temperate North America; also ne. Asia. | 
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| Cyperaceae | Schoenoplectus americanus | Olney Threesquare | Tidal freshwater to brackish marshes. | NS west to WA, south to South America. | 
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| Cyperaceae | Schoenoplectus californicus | Giant Bulrush, Southern Bulrush, Tule, California Bulrush | Marshes. | SC south to s. FL, west to TX, and extending s. into the New World tropics; on the west coast, from CA southward. | 
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| Cyperaceae | Schoenoplectus deltarum | Delta Bulrush | Brackish marshes and other wetlands. | AL and FL west to KS and se. TX. | 
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| Cyperaceae | Schoenoplectus etuberculatus | Swamp Bulrush, Canby's Bulrush | Beaver ponds, on peat in small depression ponds, in flowing blackwater streams. | DE south to c. peninsular FL and west to e. TX (the distribution rather discontinuous); substantially disjunct in s. MO (Oregon County). | 
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| Cyperaceae | Schoenoplectus heterochaetus | Slender Bulrush | Fresh marshes and lakes. | VT and QC west to AB, south to NY, PA, w. KY, TX, and CA. | 
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| Cyperaceae | Schoenoplectus lacustris ssp. lacustris | | | Native of Europe. | 
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| Cyperaceae | Schoenoplectus pungens var. longispicatus | Western Three-square | Marshes, fens. | ON, NT, and BC south to TX, NM, AZ, CA, and Mexico. | |
| Cyperaceae | Schoenoplectus pungens var. pungens | Common Threesquare, Chairmaker's Rush, Swordgrass | Tidal marshes, other marshes, inland salt marshes, rocky river beds, wet meadows, lake edges, moist fields. | The species is circumboreal, ranging in North America from NL (Newfoundland) west to AK, south to South America; var. pungens is widespread. | 
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| Cyperaceae | Schoenoplectus subterminalis | Swaying Rush, Water Bulrush | Beaver ponds, bogs, blackwater creeks, peat mats, in highly acid water. | NL (Newfoundland) west to s. AK, south to se. NC, nc. SC, MO, UT (?), and n. CA (the distribution discontinuous, especially southward); disjunct southwards in s. AL and Panhandle FL. | 
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| Cyperaceae | Schoenoplectus tabernaemontani | Softstem Bulrush, Great Bulrush, Cattail-flag | Tidal marshes, freshwater marshes, sedge meadows, streambeds, riverbeds, floodplain pools, calcareous fens. | NL (Newfoundland) west to AK, south to South America; also in Eurasia, Africa, etc. | 
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| Cyperaceae | Schoenoplectus torreyi | Torrey's Bulrush, Torrey's Threesquare | Sinkhole ponds. | NB west to MB, south to NJ, PA, WV, w. VA, MO, and NE. Known in VA only from natural ponds in Augusta and Rockingham counties. Reported as new to MD (Longbottom, Naczi, & Knapp 2016). | 
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