| 1 | Cyperus | acuminatus | Taperleaf Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 2 | Cyperus | bipartitus | Slender Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 3 | Cyperus | brevifolioides | Pasture Spikesedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 4 | Cyperus | compressus | Poorland Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 5 | Cyperus | croceus | Baldwin's Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 6 | Cyperus | dentatus | Toothed Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 7 | Cyperus | diandrus | Umbrella Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 8 | Cyperus | difformis | Smallflower Umbrella Sedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 9 | Cyperus | echinatus | Globe Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 10 | Cyperus | erythrorhizos | Redroot Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 11 | Cyperus | esculentus var. leptostachyus | Yellow Nutsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 12 | Cyperus | filicinus | Fern Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 13 | Cyperus | filiculmis | Southeastern Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 14 | Cyperus | flavescens | Yellow Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 15 | Cyperus | flavicomus | White-edge Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 16 | Cyperus | fuscus | Brown Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 17 | Cyperus | grayi | Gray's Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 18 | Cyperus | haspan | Haspan Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 19 | Cyperus | hortensis | Low Spikesedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 20 | Cyperus | houghtonii | Houghton's Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 21 | Cyperus | hystricinus | Bristly Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 22 | Cyperus | iria | Ricefield Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 23 | Cyperus | lancastriensis | Many-flowered Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 24 | Cyperus | lupulinus ssp. macilentus | Slender Sand Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 25 | Cyperus | lupulinus ssp. lupulinus | Great Plains Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 26 | Cyperus | microiria | Asian Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 27 | Cyperus | odoratus | Fragrant Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 28 | Cyperus | plukenetii | Plukenet's Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 29 | Cyperus | polystachyos | Many-spiked Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 30 | Cyperus | pseudovegetus | Marsh Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 31 | Cyperus | refractus | Reflexed Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 32 | Cyperus | retrofractus | Rough Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 33 | Cyperus | retrorsus | Pine Barren Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 34 | Cyperus | rotundus | Nutgrass | Sedge Family | Cyperaceae | Magnoliopsida |
| 35 | Cyperus | squarrosus | Bearded Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 36 | Cyperus | strigosus | Straw-colored Flatsedge | Sedge Family | Cyperaceae | Magnoliopsida |
| 37 | Cyperus | subsquarrosus | Small-flowered Halfchaff Sedge | Sedge Family | Cyperaceae | Magnoliopsida |