# Flora of New York/Cyperaceae 3

| ← Cyperaceae 2: Carex | Flora of New York — Cyperaceae (cont'd) | Flora of New York — Cyperaceae (cont'd) | Flora of New York — Cyperaceae (cont'd) | Flora of New York — Cyperaceae (cont'd) | → Poaceae 1: Panicoideae |
| ← Cyperaceae 2: Carex | Table of contents | Genus index | Protected species index | Invasive species index | → Poaceae 1: Panicoideae |

## Family Cyperaceae (cont'd)
### Subfamily Cyperoideae (cont'd)
#### Tribe Eleocharideae
##### Eleocharis

* There are approximately 28 species of Eleocharis (spike-rush) found in New York. They are arranged here according to the system used in Flora of North America.
* ↑ S. Galen Smith, Jeremy J. Bruhl, M. Socorro González-Elizondo & Francis J. Menapace. "8. ELEOCHARIS", Flora of North America Vol. 23

###### Eleocharis subg. Limnochloa

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Limnochloa :
| Genus Eleocharis subg. Limnochloa | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis robbinsii Oakes1841. Eleocharis robbinsii Oakes | Robbin's spike-rush, Robbins' spikerush, Éléocharide Robbins | Native, Rare | | NYFA: 3 | USDA-NN ITIS FNA Images Wikispecies |
| Eleocharis equisetoides (Elliott) Torr.1816. Scirpus equisetoides Elliott1832. Eleocharis elliottii A.Dietr. (i)1836. E. equisetoides (Elliott) Torr.1852. Limnochloa equisetoides(Elliott) Walp. | Horse-tail spike-rush, Jointed spikesedge, Jointed spikerush, Knotted spike-rush | Native, Threatened | | NYFA: 2 | USDA-NN ITIS FNA Tropicos Images Wikispecies |
| Eleocharis quadrangulata (Michx.) Roem. & Schult.    Scirpus quadrangulatus Michx. | Squarestem spikerush, Square-stemmed spike-rush | Native, Endangered | | NYFA: 1 | USDA-NN Images Wikispecies |
| Genus Eleocharis subg. Limnochloa (excluded taxa) | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis interstincta (Vahl) Roem. & Schult.1805. Scirpus interstinctus Vahl1817. Eleocharis interstincta(Vahl) Roem. & Schult.1920. Trichophyllum interstinctum(Vahl) House | Knotted spikerush | N. America native, N.Y. excluded | | NYFA-Excluded | USDA-N0 FNA Tropicos BONAP Images Wikispecies |
| Eleocharis mutata (L.) Roem. & Schult.1759. Scirpus mutatus L1817. E. mutata (L.) Roem. & Schult.1920. Trichophyllum mutatum(L.) House | Scallion grass | Introduced, N.Y. excluded OBL | | NYFA-Excluded | USDA-00 ITIS Tropicos Images Wikispecies |

###### Eleocharis subg. Scirpidium

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Scirpidium :
| Genus Eleocharis | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis acicularis (L.) Roem. & Schult. (1817) | Needle spike-rush, Needle spikesedge, Dwarf hair-grass, Scirpe épingle, Éléocharide aciculaire | Native, Secure | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Eleocharis wolfii (A.Gray) A.Gray ex Britton (1876)Scirpus wolfii A.Gray | Wolf’s spike-rush, Wolf’s spikerush | Introduced, Midwest native, Impersistent | | NYFA: Xm | USDA-N0 Go Botany ITIS FNA Images Wikispecies |

###### Eleocharis subg. Zinserlingia

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Zinserlingia :
| Genus Eleocharis | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis quinqueflora (Hartmann) O. Schwarz1767. Scirpus quinqueflorus Hartmann1777. Scirpus pauciflorus Lightf.1827. E. pauciflora (Lightf.) Link1949. E. quinqueflora(Hartmann) O. Schwarz | Few-flowered spike-rush, Fewflower spikerush, Fewflowered spikesedge, Éléocharide à cinq fleurs | Native, Vulnerable | | NYFA: 3? | USDA-NN Go Botany ITIS FNA Tropicos Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Parvulae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis :
| Genus Eleocharis sect. Parvulae | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis parvula (Roem. & Schult.) Link exBluff, Nees & Schauer1815. Scirpus nanus Spreng.1817. Scirpus parvulus Roem. & Schult.1836. E. parvula (Roem. & Schult.)Link ex Bluff, Nees & Schauer1836. E. pygmaea Torr.1888. E. parvula(Roem. & Schult.) Palla (i) | Salt-loving spike-rush, Dwarf spikerush, Dwarf spike-rush, Small spike-rush, Little-head spikerushĖléocharide naine | Native, CoC: 7, Likely secure Perennial | | NYFA: 4? | USDA-NN Go Botany ITIS FNA Tropicos Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleogenus ser. Maculosae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleogenus :
| Genus Eleocharis ser. Maculosae | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis flavescens (Poir.) Urb.var. olivacea (Torr.) Gleason1836. Eleocharis olivacea Torr.1935. E. flaccidavar. olivacea1952. E. flavescensvar. olivacea | Yellow spike-rush, Green spike-rush, Bright green spikerushÉléocharide olivâtre | Native, Secure | | NYFA: 5 | USDA-NN FNA Images Wikispecies |
| Genus Eleocharis ser. Maculosae (excluded taxa) | Spikerush / spikesedge | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis flavescens (Poir.) Urb.var. flavescens1805. Scirpus flavescens Poir.1900. E. flaccida (Rchb. ex A.Spreng.) Urb.1903. E. flavescens (Poir.) Urb. | Yellow spikerush | N. America native, N.Y. excluded | | NYFA-Excluded | USDA-N0 FNA Tropicos Images Wikispecies |
| Eleocharis geniculata (L.) Roem. & Schult.1753. Scirpus geniculatus L.1817. E. geniculata (L.) Roem. & Schult. | Canada spikesedge | N. America native, N.Y. excluded | | NYFA-Excluded | USDA-NN FNA Tropicos Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleogenus ser. Ovatae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleogenus :
| Genus Eleocharis ser. Ovatae | Spikerush / Spikesedge | N.Y. Status | Distribution | NY NPT |
| Eleocharis obtusa (Willd.) Schult.1809. Scirpus obtusus Willd.1824. Eleocharis obtusa (Willd.) Schult.1926. E. ovatavar. obtusa | Blunt spikerush, Blunt spike-rushÉléocharide obtuse | Native, Secure | NYFA: 5 | USDA-NN Go Botany ITIS FNA Tropicos Images Wikispecies |
| Eleocharis ovata (Roth) Roem. & Schult. (1817) | Ovate spikerush, Ovate spike-rushÉléocharide ovale | Native, Threatened | NYFA: 1-2 | USDA-NN Go Botany ITIS FNA Images Wikispecies |
| Eleocharis engelmannii Steud. (1855)1889. E. ovatavar. engelmannii1899. E. monticola Fernald1946. E. obtusavar. engelmannii | Engelmann spike-rush, Engelmann's spikerush, Engelmann's spike-rush | Native, Endangered | NYFA: 1 | USDA-NN Go Botany ITIS FNA Images Wikispecies |
| Eleocharis aestuum D.M.Hines ex A.Haines (2001) | Tidal spikerush, Tidal spike-rush | Native, Endangered | NYFA: 1 | USDA-NN Go Botany ITIS FNA Images Wikispecies |
| Eleocharis diandra C.Wright (1883) | Wright's spikerush, Wright's spike-rush, Wright's spikesedge | Native, Endangered | NYFA: 1 | USDA-NN Go Botany ITIS FNA Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleocharis ser. Eleocharis

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleocharis :
| Genus Eleocharis ser. Eleocharis | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis erythropoda Steud.1823. Scirpus glaucus Torr. *nom. illeg. 1841. Eleocharis palustris  var. australis  Nees 1843. Eleocharis calva Torr. 1848. Eleocharis palustris  var. calva  (Torr.) A.Gray 1855. Eleocharis erythropoda Steud. 1920. Trichophyllum palustre  var. calvum  (Torr.) House 1929. E. calva (A.Gray) Torr. ex Fernald & Brackett | Red-footed spike-rush, Bald spikerush, Bald spikesedge, Bald spike-rushÉléocharide à tiges rouges | Native, CoC: 4, Secure OBL Perennial, Graminoid | | NYFA: 5 | USDA-NN Kew WCSP Go Botany ITIS FNA Tropicos Images Wikispecies |
| Eleocharis tenuis (Willd.) Schult.var. tenuis1809. Scirpus tenuis Willd.1824. E. tenuis (Willd.) Schult. auct. E. elliptica non Kunth auct. E. Capitata non (L.) R. Br. | Slender spike-rush, Dog’s hairÉléocharide grêle | Native, CoC: 4, Secure Perennial, Graminoid | | NYFA: 5 | USDA-NN Go Botany ITIS FNA Images Wikispecies |
| Eleocharis tenuis (Willd.) Schult.var. pseudoptera(Weath.) Svenson1932. E. capitatavar. pseudoptera1939. E. tenuisvar. pseudoptera1972. E. ellipticavar. pseudoptera | Slender spikerush, Slender spike-rushÉléocharide à tige ailée | Native, CoC: 4, Endangered, NYNHP: 1 Perennial, Graminoid | | NYFA: 1 | USDA-NN Go Botany ITIS FNA Tropicos Images Wikispecies |
| Eleocharis elliptica Kunth1837. E. elliptica Kunth1932. E. capitatavar. borealis1932. E. compressavar. atrata1952. E. tenuisvar. borealis1960. E. compressavar. borealis | Elliptic spike-rush, Elliptic spikerush, Slender spike-rushÉléocharide elliptique | Native, CoC: 5, Secure Perennial, Graminoid | | NYFA: 5 | USDA-NN Go Botany ITIS FNA Tropicos Images Wikispecies |
| Eleocharis palustris (L.) Roem. & Schult.1753. Scirpus palustris L.1817. E. palustris(L.) Roem. & Schult.    E. smallii Britton    E. calvavar. australis | Common spike-rush, Creeping spike-rush, Marsh spike-rushÉléocharide des marais | Native, CoC: 5, Secure OBL Perennial, Graminoid | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Eleocharis uniglumis (Link) Schult.var. halophila | Salt-marsh spike-rushÉléocharide unigume | Native, CoC: 8, Threatened, NYNHP: 2 OBL Perennial, Graminoid | | NYFA: 2 | USDA-NN Go Botany FNA Tropicos Images Wikispecies |
| Eleocharis compressa Sull.var. compressa1842. E. compressa Sull.    E. ellipticavar. compressa    E. ellipticavar. atrata | Flatstem spikerush, Flat-stemmed spike-rushÉléocharide comprimée | Native, CoC: 9, Unranked Perennial, Graminoid | | NYFA: U | USDA-NN Go Botany ITIS FNA Images Wikispecies |
| Eleocharis tricostata Torr. | Three-ribbed spike-rush, Three-angled spike-rush | Native, CoC: 10, Endangered, NYNHP: 1 OBL-FACW Perennial, Graminoid | | NYFA: 1 | USDA-N0 Go Botany Images Wikispecies |
| Eleocharis ambigens Fernald1922. E. fallax Weath. p.p.1935. E. ambigens Fernald | Ambiguous spikerush, Obscure spikerush, Creeping spikerushÉléocharide ambiquë | Native, CoC: 10, Endangered OBL Perennial, Graminoid | | NYFA: 1 | USDA-NN Go Botany VASCAN ITIS FNA Tropicos Images Wikispecies |
| Genus Eleocharis ser. Eleocharis (excluded taxa) | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis fallax Weath.1922. E. fallax Weath.1935. E. ambigens Fernald | Creeping spikerush | N. America native, N.Y. excluded OBL Perennial, Graminoid | | NYFA-Excluded | USDA-NN Go Botany FNA Tropicos Images Wikispecies |
| ↑ New York Natural Heritage Program. 2024. Online Conservation Guide for Eleocharis tenuis var. pseudoptera. Endangered, S1/G5T5?. ↑ New York Natural Heritage Program. 2024. Online Conservation Guide for Eleocharis uniglumis var. halophila. Threatened, S2/G4. ↑ New York Natural Heritage Program. 2024. Online Conservation Guide for Eleocharis tricostata. Endangered, S1/G4. ||||||

###### Eleocharis subg. Eleocharis sect. Eleocharis ser. Tenuissimae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleocharis :
| Genus Eleocharis ser. Tenuissimae | Spikerush / Spikesedge | N.Y. Status | Distribution | NY NPT |
| Eleocharis intermedia Schult. | Intermediate spike-rush, Matted spike-rush | Native, CoC: 8, Likely secure OBL-FACW Perennial, Graminoid | NYFA: 4 | USDA-NN Go Botany Images Wikispecies |
| Eleocharis tuberculosa | Long-tubercled spike-rush | Native, CoC: 10, Threatened OBL-FACW Perennial, Graminoid | NYFA: 2 | USDA-NN Go Botany Images Wikispecies |
| Eleocharis tortilis (Link) Schult.1820. Scirpus tortilis Link1824. E. tortilis (Link) Schult. auct. E. simplex non A.Dietr. 1832 | Twisted spike-rush, Twisted spike-sedge | Native, CoC: 10, No recent reports | NYFA: Z | USDA-N0 ARS-GRIN ITIS FNA Tropicos Images Wikispecies |
| Eleocharis microcarpa Torr.var. filiculmis Torr. | Small-fruited spike-rush | Native, Unknown | NYFA: U | Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleocharis ser. Melanocarpae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleocharis :
| Genus Eleocharis ser. Melanocarpae | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis melanocarpa Torr.1836. Eleocharis melanocarpa Torr.1866. Scirpus melanocarpus(Torr.) Griseb.1891. Scirpus melanocarpus(Torr.) Kuntze | Black-fruited spike-rush | Native, CoC: 10, Rare FACW Perennial, Graminoid | | NYFA: 3 | USDA-N0 FNA Tropicos Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleocharis ser. Rostellatae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleocharis :
| Genus Eleocharis ser. Rostellatae | Spikerush / Spikesedge | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis rostellata (Torr.) Torr.1836. Scirpus rostellatus Torr.1843. E. rostellata (Torr.) Torr. | Beaked spikerush, Beaked spike-rush, Beaked spikesedge, Walking sedge | Native, Likely secure | | NYFA: 4 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |

###### Eleocharis subg. Eleocharis sect. Eleocharis ser. Albidae

Poales — Cyperaceae — Cyperoideae — Eleocharideae — Eleocharis subg. Eleocharis sect. Eleocharis :
| Genus Eleocharis ser. Albidae (excluded taxa) | Spikerush | N.Y. Status | Images | Distribution | NY NPT |
| Eleocharis albida Torr1836. Eleocharis albida Torr. | White spikerush | N. America native, N.Y. excluded | | NYFA-Excluded | USDA-N0 FNA Tropicos Images Wikispecies |

#### Tribe Abildgaardieae
##### Bulbostylis

* Bulbostylis capillarisDense-tuft hair sedge (Bulbostylis capillaris) is a small annual sedge commonly found in disturbed, well-drained, sandy soil, often along roadsides.
Poales — Cyperaceae — Cyperoideae — Abildgaardieae — Bulbostylis :
| Genus Bulbostylis Kunth | Hairsedge | N.Y. Status | Images | Distribution | NY NPT |
| Bulbostylis capillaris (L.) Kunth ex C.B.Clarke1753. Scirpus capillaris L.1893. Fimbristylis capillaris (L.) A.Gray1894. Stenophyllus capillaris (L.) Britton | Tufted hair sedge ⓘ Tufted hair-sedge ⓘ Densetuft hairsedge ⓘ Hair sedge ⓘ | Native, CoC: 0, Secure FACU Annual, Graminoid | | NYFA: 5 iNat | USDA-NN WFO Go Botany VASCAN FNA Tropicos Images Wikispecies |

##### Fimbristylis

Poales — Cyperaceae — Cyperoideae — Abildgaardieae — Fimbristylis :
| Genus Fimbristylis Vahl | Fimbry | N.Y. Status | Images | Distribution | NY NPT |
| Fimbristylis autumnalis (L.) Roem. & Schult.    Scirpus autumnalis L.    F. autumnalis (L.) Roem. & Schult.    F. geminata (Nees) Kunth | Autumn fimbry, Slender fimbry | Native, CoC: 5, Secure OBL-FACW Annual, Graminoid | | NYFA: 5 | USDA-NN Images Wikispecies |
| Fimbristylis castanea (Michx.) Vahl    Scirpus castaneus Michx. | Marsh fimbry | Native, CoC: 10, Threatened OBL-FACW Perennial, Graminoid | | NYFA: 2 | USDA-N0 Images Wikispecies |
| Fimbristylis puberula (Michx.) Vahlvar. puberula        Fimbristylis puberula (Michx.) Vahl | Hairy fimbry | Native, CoC: 10, Likely extirpated OBL-FACW Perennial, Graminoid | | NYFA: Z | USDA-NN Images Wikispecies |
| Genus Fimbristylis (excluded taxa) | Fimbry | N.Y. Status | Images | Distribution | NY NPT |
| Fimbristylis caroliniana (Lam.) Fernald1791. Scirpus carolinianus Lam.1913. Fimbristylis harperi Britton1940. Fimbristylis caroliniana Fernald | Carolina fimbry | N. America native, N.Y. excluded | | NYFA-Excluded | USDA-N0 Images Wikispecies |

#### Tribe Bolboschoeneae

* Tribe Bolboschoeneae (Tatanov) J. R. Starr

##### Bolboschoenus

* Bolboschoenus fluviatilisBolboschoenus species are known as tuberous bulrushes or tuber-bulrushes. This genus has also been considered to be a section of Scirpus, which is similar but has spikelets that are usually smaller and more numerous.
Poales — Cyperaceae — Cyperoideae — Fuireneae — Bolboschoenus :
| Genus Bolboschoenus | Tuberous bulrush | N.Y. Status | Distribution | NY NPT |
| Bolboschoenus fluviatilis (Torr.) Soják1836. Scirpus maritimusvar. fluviatilis1856. Scirpus fluviatilis (Torr.) A.Gray1972. B. fluviatilis (Torr.) Soják1981. B. maritimusssp. fluviatilis1993. Schoenoplectus fluviatilisM.T.Strong | River bulrush, River tuber-bulrushBolboschoenus fluviatile, Scirpe fluviatile | Native, CoC: 4, Secure OBL | NYFA: 5 | USDA-NN Go Botany ARS-GRIN FNA Tropicos Images Wikispecies |
| Bolboschoenus robustus (Pursh) Soják    Scirpus robustus Pursh    Schoenoplectus robustus1972. B. robustus (Pursh) Soják | Sea-coast bulrush, Saltmarsh bulrush, Sturdy bulrush | Native, CoC: 9, Vulnerable OBL | NYFA: 3-4 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Bolboschoenus maritimus (L.) Pallassp. paludosus(A.Nelson) T.Koyama1899. Scirpus paludosus A.Nelson1905. Scirpus pacificus Britton ex Parish1926. Scirpus maritimusvar. paludosus1971. Schoenoplectus maritimus(L.) Lye1980. B. maritimusssp. paludosus | American   saltmarsh bulrush, Seaside bulrush, Cosmopolitan bulrush, Prairie bulrushBolboschoenus     des marais salés, Scirpe des marais salés | Native, CoC: 8, Threatened OBL | NYFA: 2 | USDA-NN Go Botany ARS-GRIN FNA Tropicos Images Wikispecies |
| Bolboschoenus maritimus (L.) Pallassp. maritimus | European   saltmarsh bulrush | Introduced, Unk. naturalization OBL | NYFA: Xu | USDA-N?M Go Botany Images Wikispecies |
| Bolboschoenus novae-angliae (Britton) S.G.Sm.    Schoenoplectus novae-angliae    Scirpus novae-angliae Britton1995. B. novae-angliae (Britton) S.G.Sm. | New England bulrush, Saltmarsh bulrush | Native, CoC: 10, Endangered OBL | NYFA: 1 | USDA-N0 Go Botany Images Wikispecies |
| Bolboschoenus glaucus (Lam.) S.G.Sm.1791. Scirpus glaucus Lam.1834. Scirpus maritimusvar. glaucus1995. B. glaucus (Lam.) S.G.Sm.1999. Schoenoplectus glaucus(Lam.) Kartesz auct. Scirpus tuberosus non Desf. | Tuberous bulrush | Introduced, Unk. naturalization OBL | NYFA: X | USDA-X0 Go Botany ITIS FNA Tropicos IPN Images Wikispecies |

#### Tribe Fuireneae
##### Fuirena

Poales — Cyperaceae — Cyperoideae — Fuireneae — Fuirena :
| Genus Fuirena Rottb. | Umbrella-sedge | N.Y. Status | Distribution | NY NPT |
| Fuirena pumila (Torr.) Spreng.1824. Fuirena squarrosa  var. pumila  Torr. 1825. Fuirena pumila (Torr.) Spreng. 1833. Fuirena torreyana L.C.Beck 1890. Fuirena simplex  var. pumila  (Torr.) C.B. Clarke ex Coville | Dwarf umbrella-sedge ⓘ Dwarf umbrella-grass ⓘ | Native, CoC: 10, Rare, S2, G4 OBL Annual, Graminoid | Orange, Suffolk NYFA: 3 | USDA-NN Go Botany FNA Tropicos Images Wikispecies |
| Fuirena squarrosa Michx.1803. Fuirena squarrosa Michx. 1821. Fuirena hispida Elliott 1860. Fuirena squarrosa  var. hispida  (Elliott) Chapm. | Hairy umbrella-sedge | Native, CoC: 10, Likely extirpated, SX OBL, Graminoid | Long Island (no county) NYFA: U | USDA-N0 Go Botany Tropicos Images Wikispecies |
| ↑ The New York Flora Atas states: "All studied vouchers reported as Fuirena squarrosa from New York sites have been annotated to Fuirena pumila." The USDA-NRCS PLANTS database, however, shows F. squarrosa present on Long Island, but no protected status is given for New York. Flora of North America also shows F. squarrosa present in N. Y. ||||||

#### Tribe Schoenoplecteae
##### Schoenoplectus

Schoenoplectus (bulrush) has been separated from Scirpus due to phylogenetic differences.
The Schoenoplectus sections used here are from Flora of North America.
Poales — Cyperaceae — Cyperoideae — Fuireneae — Schoenoplectus :
| Genus Schoenoplectus sect. Schoenoplectus | Bulrush | N.Y. Status | Images | Distribution | NY NPT |
| Schoenoplectus pungens (Vahl) Pallavar. pungens    Scirpus pungens Vahl1888. Sch. pungens (Vahl) Palla    Scirpus americanusvar. polyphyllus    Scirpus pungensvar. polyphyllus auct. Scirpus americanus non Pers. | Three-square bulrush, Common three-square  bulrush, Chair-maker’s rush, Sharp club-rush, Scirpe acere | Native, Secure | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Schoenoplectus americanus (Pers.) Volkart ex Schinz & R.Keller (1905)    Scirpus americanus Persoon    Scirpus olneyi A.Gray    Scirpus pungensvar. longisetus    Scirpus pungensssp. monophyllus | Three-square bulrush, Olney’s three-square  bulrush, Chairmaker's bulrush, American bulrush | Native, Secure | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Schoenoplectus acutus (Muhl. ex Bigelow) Á.Löve & D.Löve (1954)var. acutus    Scirpus acutus    Schoenoplectus lacustrisssp. acutus | Hardstem bulrush, Hard-stemmed bulrush, Scirpe aigu | Native, Secure | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| Schoenoplectus tabernaemontani (Gmel.) Palla | Softstem bulrush, Soft-stemmed bulrush, Great bulrushScirpe des étangs | Native, Secure | | NYFA: 5 | USDA-NN Go Botany ARS-GRIN Images Wikispecies |
| Schoenoplectus heterochaetus (Chase) Soják | Slender bulrush | Native, CoC: 9, Endangered | | NYFA: 2 | USDA-NN Go Botany Images Wikispecies |
| Schoenoplectus × oblongus (T. Koyama) Soják[ acutus × heterochaetus ] | Oblong bulrush | Native, Unranked | | NYFA: U | Images Wikispecies |
| S. acutus × tabernaemontani | Bulrush | Native, Unranked | | NYFA: U | Images Wikispecies |
| Genus Schoenoplectus sect. Malacogeton | Bulrush | N.Y. Status | Images | Distribution | NY NPT |
| Schoenoplectus subterminalis (Torr.) Soják | Water bulrush | Native, CoC: 10, Secure | | NYFA: 5u | USDA-NN Go Botany Images Wikispecies |
| Schoenoplectus torreyi (Olney) Palla | Torrey's bulrush, Torrey’s three-square  bulrush | Native, CoC: 10, Threatened OBL | | NYFA: 2 | USDA-NN Go Botany FNA Images Wikispecies |

#### Tribe Pseudoschoeneae

* Tribe Pseudoschoeneae contains the genus Schoenoplectiella.
* ↑ Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 14, July 2017 (Page last updated: 05/25/2021). http://www.mobot.org/MOBOT/research/APweb/

##### Schoenoplectiella

* Schoenoplectiella purshianaSchoenoplectiella (bulrush) has been separated from Schoenoplectus and Scirpus due to phylogenetic differences. In New York State, this comprises the annual, cespitose bulrush species.
* ↑ MICHIGAN FLORA ONLINE. A. A. Reznicek, E. G. Voss, & B. S. Walters. February 2011. University of Michigan. Web. February 23, 2021. https://michiganflora.net/genus.aspx?id=Schoenoplectiella.
Poales — Cyperaceae — Cyperoideae — Fuireneae — Schoenoplectiella :
| Genus Schoenoplectiella | Bulrush | N.Y. Status | Distribution | NY NPT |
| Schoenoplectiella purshiana (Fernald) Lyevar. purshiana    Schoenoplectiella purshiana     Scirpus purshianus Fernald     Scirpus debilis Pursh     Schoenoplectus purshianus var. purshianus     Scirpus smithii  var. williamsii | Weak-stalked bulrush ⓘ Weakstalk bulrush ⓘ Weak-stalk club-rush ⓘ | Native, CoC: 6, Likely secure OBL Annual, Graminoid | NYFA: UN | USDA-NN Go Botany FNA Images Wikispecies |
| Schoenoplectiella smithii (A. Gray) Hayasakavar. smithii    Schoenoplectiella smithii in…     Scirpus smithii  var. smithii  {{{5}}}     Schoenoplectus smithii  var. smithii  {{{5}}} | Smith’s bulrush ⓘ | Native, CoC: 10, Rare OBL Annual, Graminoid | NYFA: 4 iNat | USDA-NN Go Botany FNA Images Wikispecies |
| Schoenoplectiella smithii (A. Gray) Hayasakavar. setosa (Fernald) Hayasaka    Scirpus smithii  var. setosus  Fernald     Schoenoplectus smithii var. setosus (Fernald) S.G. Sm.     Schoenoplectiella smithii var. setosa (Fernald) Hayasaka | Smith’s bristly bulrush ⓘ | Native, CoC: 10, Endangered OBL Annual, Graminoid | NYFA: 1 iNat | USDA-NN Go Botany VASCAN FNA Images Wikispecies |
| Schoenoplectiella mucronata (L.) J. Jung & H.K. Choi1753. Scirpus mucronatus L. 1888. Schoenoplectus mucronatus in… 2010. Schoenoplectiella mucronata in… | Bog bulrush ⓘ Ricefield bulrush ⓘ Roughseed bulrush ⓘ | Introduced from  Eurasia,  northern Africa,  Australia, Highly invasive, Naturalized, NTS Tier 2 OBL Perennial, Graminoid | NYFA: Xn | USDA-XX Go Botany ARS-GRIN ITIS FNA Images Wikispecies |
| ↑ New York State Invasive Species Tiers: Schoenoplectiella mucronata NYS-2. 2021 New York Natural Heritage Program ||||||

#### Tribe Cypereae
##### Cyperus

* Most of the species of Cyperus (pronounced sie-PEER-us) go by common names containing flat-sedge, or in some cases umbrella-sedge, nut-sedge, or nut-grass.

###### Cyperus subg. Cyperus

Poales — Cyperaceae — Cyperoideae — Cypereae — Cyperus subg. Cyperus :
| Genus Cyperus subg. Cyperus sect. Neohemicarpha | Dwarf bulrush | N.Y. Status | Images | Distribution | NY NPT |
| Cyperus subsquarrosus (Muhl.) Bautersyyyy. Scirpus micranthus Vahl yyyy. Lipocarpha micrantha (Vahl) G.Tucker yyyy. Hemicarpha micrantha (Vahl) Pax yyyy. Cyperus subsquarrosus (Muhl.) Bauters | Small-flowered dwarf bulrush, Dwarf bulrush, Smallflower halfchaff sedge | Native, Endangered | | NYFA: 5 | USDA-NN Images Wikispecies |
| ↑ Flora of North America Vol. 23, 15d. Cyperus subg. Cyperus ||||||

###### Cyperus subg. Diclidium

Poales — Cyperaceae — Cyperoideae — Cypereae — Cyperus subg. Diclidium :
| Genus Cyperus | Flatsedge | N.Y. Status | Images | Distribution | NY NPT |
| Cyperus odoratus L. | Fragrant flatsedge, Rusty flatsedge | Native, Vulnerable | | NYFA: 3 | USDA-NN Go Botany Images Wikispecies |
| ↑ Flora of North America Vol. 23, 15e. Cyperus subg. Diclidium ||||||

###### Cyperus subg. Juncellus

Poales — Cyperaceae — Cyperoideae — Cypereae — Cyperus subg. Cyperus :
| Genus Cyperus subg. Juncellus | Flatsedge | N.Y. Status | Images | Distribution | NY NPT |
| Cyperus strigosus L. | False yellow nut sedge, Straw-colored flatsedge, False nutsedge | Native, CoC: 3, Secure FACW Perennial, Graminoid | | NYFA: 5 | USDA-NN Go Botany Images Wikispecies |
| Cyperus squarrosus L. | Awned flatsedge, Awned cyperus, Bearded flatsedge, Bearded flat sedge | Native, CoC: 2, Secure OBL-FACW Annual, Graminoid | | NYFA: 5 | USDA-NN Go Botany Images Wikispecies |
| Cyperus lupulinus (Spreng.) Marcksssp. macilentus (Fernald) Marcks | Eastern flatsedge, Great Plains flatsedge | Native, CoC: 4, Secure Perennial, Graminoid | | NYFA: 5 | USDA-NN Go Botany Images Wikispecies |
| Cyperus lupulinus (Spreng.) Marcksssp. lupulinus | Great Plains flatsedge | Native, CoC: 8, Threatened Perennial, Graminoid | | NYFA: 2 | USDA-NN Go Botany Images Wikispecies |
| Cyperus erythrorhizos Muhl. | Redroot flatsedge | Native, CoC: 6, Vulnerable | | NYFA: 3 | USDA-NN Go Botany Images Wikispecies |
| Cyperus grayi Torr. | Gray's flatsedge | Native, CoC: 8, Vulnerable | | NYFA: 3 | USDA-N0 Go Botany Images Wikispecies |
| Cyperus houghtonii Torr. | Houghton's flatsedge, Houghton's umbrella-sedge | Native, CoC: 8, Vulnerable | | NYFA: 3 | USDA-NN Go Botany Images Wikispecies |
| Cyperus schweinitzii | Schweinitz's flatsedge | Native, CoC: 7, Rare | File:Botanical and vegetation survey of Carter County, Montana, Bureau of Land Management-administered lands (1998) (20207931773).jpg | NYFA: 2-3 | Go Botany Images Wikispecies |
| Cyperus echinatus | Globe flatsedge, Teasel sedge | Native, CoC: 8, Endangered | | NYFA: 1 | USDA-N0 Go Botany Images Wikispecies |
| Cyperus retrorsus Chapm. | Reflexed flatsedge, Cylindric sedge, Pine barren flatsedge, Retrorse flatsedge | Native, CoC: 7, Endangered | | NYFA: 1 | USDA-N0 Go Botany Images Wikispecies |
| Cyperus plukenetii Fernald1945. Cyperus plukenetii Fernald | Plukenet's cyperus | Native, Likely extirpated | | NYFA: Z | USDA-N0 Go Botany FNA Tropicos Images Wikispecies |
| Cyperus compressus L. | Poorland flatsedge | Introduced, US South native | | NYFA: X | USDA-N0 Go Botany Images Wikispecies |
| Cyperus esculentus L.var. macrostachyus | Chufa flatsedge, Yellow nut-grass, Yellow nutsedge | Native, CoC: 1, Unranked | | NYFA: X | USDA-N0 Go Botany Images Wikispecies |
| Cyperus esculentus L.var. leptostachyus | Chufa flatsedge, Yellow nut-grass, Yellow nutsedge | Native, CoC: 1, Unranked | | NYFA: U | USDA-XX Go Botany Images Wikispecies |
| Cyperus iria L. | Ricefield flatsedge | Introduced | | NYFA: X | USDA-XX Go Botany Images Wikispecies |
| Cyperus microiria Steud.    Cyperus microiria Steud. auct. Cyperus amuricus | Asian flatsedge | Introduced, Naturalized | | NYFA: X | Go Botany Images Wikispecies |
| Cyperus rotundus | Purple flatsedge, Purple nut-sedge, Coco-grass | Introduced, Impersistent | | NYFA: | Go Botany Images Wikispecies |
| Genus Cyperus subg. Cyperus (excluded taxa) | Flatsedge | N.Y. Status | Images | Distribution | NY NPT |
| Cyperus filiculmis Vahl1805. Cyperus filiculmis Vahl1888. Cyperus martindalei Britton1902. Chlorocyperus filiculmis(Vahl) Falla1974. Mariscus filiculmis(Vahl) T. Koyama1974. Cyperus lupulinus(Spreng.) Marcks p.p. | Slender cyprus, Eastern flatsedge, Great plains flatsedge | N. America native, N.Y. excluded | | NYFA-Excluded | Go Botany FNA Tropicos Images Wikispecies |
| Cyperus amuricus1855. Cyperus microiriaSteud. (correct NY sp.)1859. Cyperus amuricusMaxim. (misapplied) | Asian flatsedge | Introduced, N.Y. excluded | | NYFA-Excluded | USDA-X0 Go Botany FNA Tropicos Images Wikispecies |
| ↑ Desmet, P., & Brouilet, L. 2013. Database of Vascular Plants of Canada (VASCAN): a community contributed taxonomic checklist of all vascular plants of Canada, Saint Pierre and Miquelon, and Greenland. PhytoKeys 25: 55-67. http://dx.doi.org/10.3897/phytokeys.25.3100 ||||||

###### Cyperus subg. Kyllinga

Poales — Cyperaceae — Cyperoideae — Cypereae — Kyllinga :
| Genus Cyperus subg. Kyllinga | Spikesedge | N.Y. Status | Images | Distribution | NY NPT |
| Cyperus brevifolioides Thieret & Delahouss.1844. Cyperus brevifolus in… 1866. Kyllinga gracillima Miq. 1956. Cyperus brevifolus  var. leiolepis  (Franch. & Savigny) T. Koyama 1967. Cyperus brevifolioides in… 1987. Kyllinga brevifolioides in… | Asiatic greenhead sedge, Pasture spikesedge | Introduced, Rare | | NYFA: X | USDA-N0 Images Wikispecies |
| Cyperus hortensis (Salzm. ex Schltdl.) Dorr1803. Kyllinga pumila Michx. 1849. K. hortensis Salzm. pro syn. 1855. K. tenuifolia Steud. 1936. Cyperus densicaespitosus in… 1944. C. tenuifolius (Steud.) Dandy 2014. C. hortensis in… | Annual greenhead sedge, Low spikesedge | Introduced, N. America native, Rare | | NYFA: X | USDA-N0 FNA Images Wikispecies |

###### Cyperus subg. Pycnostachys

* Cyperus dentatusCyperus subg. Pycnostachys contains about 150 species worldwide, with about 22 found in North America. Of these, only Cyperus dentatus is considered native to New York State.
* ↑ Gordon C. Tucker, Brian G. Marcks, J. Richard Carter (2020). Cyperus subg. Pycnostachys in Flora of North America Vol.23.
Poales — Cyperaceae — Cyperoideae — Cypereae — Cyperus subg. Pycnostachys :
| Genus Cyperus | Flatsedge | N.Y. Status | Distribution | NY NPT |
| Cyperus dentatus Torr.    Cyperus dentatus Torr. | Toothed sedge, Toothed flat sedge | Native, CoC: 8, Likely secure, S4, G4 OBL-FACW Perennial, Graminoid | NYFA: 3 iNat | USDA-NN Images Wikispecies |
| Cyperus acuminatus Torr. & Hook.    Cyperus acuminatus Torr. & Hook. | Taper-tipped flatsedge, Tapertip flatsedge, Short-point flatsedge | Introduced, N. America native | NYFA: 2 counties iNat: no observations NYFA: X iNat | USDA-NN Images Wikispecies |
| Cyperus difformis L.1753. Cyperus difformis L. | Variable flatsedge | Introduced, Moderately invasive,  NYIS: 52% | NYFA: Queens (2012), Suffolk (2012) iNat: Richmond (2015-19) NYFA: Xn iNat | USDA-X0 Images Wikispecies |
| Cyperus involucratus Rottb. auct. C. alternifolius non L.    C. alternifoliusssp. flabelliformis    C. flabelliformis Rottb. | Alternate-leaved flatsedge, Umbrella-plant, Umbrella papyrus | Introduced, Not naturalized, Impersistent, Cutivated | Bronx (1948) NYFA: X iNat | USDA-XX Images Wikispecies |
| ↑ New York non-native plant invasiveness assessment – Cyperus difformis: Moderate (52). ||||||

###### Cyperus subg. Pycreus

Poales — Cyperaceae — Cyperoideae — Cypereae — Cyperus subg. Pycreus :
| Genus Cyperus subg. Pycreus | Flatsedge | N.Y. Status | Distribution | NY NPT |
| Cyperus bipartitus Torr.1836. Cyperus bipartitus Torr.1837. Cyperus rivularis Kunth1907. Pycreus rivularis (Kunth) Palla1908. Pycreus bipartitus (Torr.) C.B.Clarke1958. Cyperus nigervar. rivularis | Slender flatsedge, Shining flatsedgeSouchet des rivières, Souchet bipartite | Native, Secure FACW Annual, Graminoid | NYFA: 5 | USDA-NN Go Botany VASCAN FNA Tropicos Images Wikispecies |
| Cyperus diandrus Torr.1819. Cyperus diandrus Torr.1819. Torreya maritima (Torr.) Raf.1908. Pycreus diander (Torr.) C.B.Clarke | Umbrella flatsedge, Low umbrella flatsedge, Low cyperusSouchet diandre | Native, Secure OBL-FACW | NYFA: 5? | USDA-NN Go Botany VASCAN FNA Images Wikispecies |
| Cyperus filicinus Vahl1805. Cyperus filicinus Vahl1868. C. polystachyosvar. macrostachyos | Fern flatsedge | Native, Rare OBL Annual-perennial, Graminoid | NYFA: 3? | USDA-N0 Go Botany FNA Tropicos Images Wikispecies |
| Cyperus polystachyos Rottb.1773. Cyperus polystachyos Rottb.1816. Pycreus polystachyos(Rottb.) P.Beauv.1828. Cyperus brizaeus J.Presl & C.Presl | Many-spiked flat sedge, Manyspike flatsedge, Bunchy flat sedge | Native, Endangered Annual-perennial, Graminoid | NYFA: 1-2 | USDA-N0 Go Botany ARS-GRIN FNA Tropicos Images Wikispecies |
| Cyperus flavescens L.1753. Cyperus flavescens L.1814. Cyperus poiformis Pursh1830. Pycreus flavescens (L.) Rchb.1939. Cyperus flavescensvar. poiformis | Yellow flatsedge, Yellow flat sedge, Annual yellow flatsedge, Pale flatsedgeSouchet jaunâtre | Native, Endangered OBL Annual, Graminoid | NYFA: 1 | USDA-NN Go Botany VASCAN FNA Images Wikispecies |
| Cyperus flavicomus Michx.1803. Cyperus flavicomus Michx. | White-edged flat sedge, Whiteedge flatsedge | Introduced from  southern US, Impersistent FAC Annual, Graminoid | NYFA: Xm | USDA-N0 FNA Images Wikispecies |

##### Genus Scirpoides

Poales — Cyperaceae — Cyperoideae — Cypereae — Scirpoides :
| Genus Scirpoides (excluded taxa) | Bulrush | N.Y. Status | Images | Distribution | X NPT |
| Scirpoides holoschoenus (L.) Soják1753. Scirpus holoschoenus L. 1827. Holoschoenus vulgaris Link 1897. Holoschoenus romanus (L.) Fritsch 1972. Scirpoides holoschoenus (L.) Soják | Round-headed bulrush, Roundhead bulrush, Roughhead bulrush | Introduced from  Eurasia,  northern Africa, N.Y. excluded | | NYFA-Excluded | USDA-X ARS-GRIN Tropicos BONAP Images Wikispecies |