| Cyperaceae | |
Rhynchospora aberrans
| C.B. Clarke | Bull. Misc. Inform. Kew, Addit. Ser. 8: 35 | 1908 |
| Cyperaceae | |
Rhynchospora acanthoma
| A.C. Araújo & Longhi-Wagner | Kew Bull. 63(2): 303–304, 306, f. 2, t. 1 | 2008 |
| Cyperaceae | |
Rhynchospora adscendens
| C.B. Clarke | Consp. Fl. Afric. 5: 652 | 1895 |
| Cyperaceae | |
Rhynchospora adulta
| Schltdl. | Bot. Zeitung (Berlin) 7: 166 | 1849 |
| Cyperaceae | |
Rhynchospora affinis
| W. Fitzg. | J. Roy. Soc. Western Australia 3: 124 | 1918 |
| Cyperaceae | |
Rhynchospora africana
| Cherm. | Arch. Bot. Bull. Mens. 4(7): 44 | 1931 |
| Cyperaceae | |
Rhynchospora agostiniana
| T. Koyama | Mem. New York Bot. Gard. 23: 25 | 1972 |
| Cyperaceae | ! |
Rhynchospora alba
| (L.) Vahl | Enum. Pl. 2: 236 | 1805 |
| Cyperaceae | |
Rhynchospora albescens
| (Miq.) Kük. | Bot. Jahrb. Syst. 75: 304 | 1951 |
| Cyperaceae | |
Rhynchospora albiceps
| Kunth | Enum. Pl. [Kunth] 2: 289 | 1837 |
| Cyperaceae | |
Rhynchospora albida
| (Nees) Boeckeler | Linnaea 37: 561 | 1871-1873 [1873] |
| Cyperaceae | ! |
Rhynchospora albobracteata
| A.C. Araújo | Brittonia 64(4): 385, f. 1G–H | 2012 |
| Cyperaceae | |
Rhynchospora albomarginata
| Kük. | Bot. Jahrb. Syst. 56(Beibl. 125): 16 | 1921 |
| Cyperaceae | |
Rhynchospora albotuberculata
| Kük. | Boissiera 7: 101 | 1943 |
| Cyperaceae | |
Rhynchospora almensis
| D.A. Simpson | Kew Bull. 50(1): 151, f. 1 | 1995 |
| Cyperaceae | |
Rhynchospora alpina
| (R. Br.) Spreng. | Syst. Veg. [Sprengel] 1: 195 | 1825 [1824] |
| Cyperaceae | * |
Rhynchospora alpina
| Palla | Denkschr. Kaiserl. Akad. Wiss., Wien. Math.-Naturwiss. Kl. 79: 191 | 1908 |
| Cyperaceae | |
Rhynchospora alta
| Boeckeler | Beitr. Cyper. 2: 20 | 1890 |
| Cyperaceae | |
Rhynchospora amazonica
| Poepp. & Kunth | Enum. Pl. [Kunth] 2: 292 | 1837 |
| Cyperaceae | |
Rhynchospora andina
| Kük. | Feddes Repert. Spec. Nov. Regni Veg. 53: 73 | 1944 |
| Cyperaceae | |
Rhynchospora andresii
| Gómez-Laur. | Phytologia 51(7): 477 | 1982 |
| Cyperaceae | |
Rhynchospora angolensis
| Turrill | Bull. Misc. Inform. Kew 1914: 136 | 1914 |
| Cyperaceae | |
Rhynchospora angosturensis
| W.W. Thomas | Mem. New York Bot. Gard. 37: 75, f. 31 | 1984 |
| Cyperaceae | |
Rhynchospora angusta
| (Gale) Sorrie, LeBlond & Weakley | J. Bot. Res. Inst. Texas 12(2): 464 | 2018 |
| Cyperaceae | |
Rhynchospora angustifolia
| Palla | Akad. Wiss. Wien, Math.-Naturwiss. Kl., Denkschr. 79: 193 | 1908 |
| Cyperaceae | |
Rhynchospora angustipaniculata
| M.T. Strong | Novon 11(2): 261–263, f. 1 | 2001 |
| Cyperaceae | |
Rhynchospora anomala
| Steud. | Syn. Pl. Glumac. 2: 149 | 1855 |
| Cyperaceae | |
Rhynchospora arechavaletae
| Boeckeler | Beitr. Cyper. 1: 24 | 1888 |
| Cyperaceae | |
Rhynchospora arenicola
| Uittien | Recueil Trav. Bot. Néerl. 22: 335 | 1925 |
| Cyperaceae | |
Rhynchospora argentea
| Standl. | Contr. U.S. Natl. Herb. 18(3): 87 | 1916 |
| Cyperaceae | |
Rhynchospora aripoensis
| Britton | Bull. Torrey Bot. Club 48(12): 327 | 1921 [1922] |
| Cyperaceae | |
Rhynchospora aristata
| Boeckeler | Flora 40: 36 | 1857 |
| Cyperaceae | |
Rhynchospora armerioides
| J. Presl & C. Presl | Reliq. Haenk. 1(3): 197, t. 31, f. 2 | 1828 |
| Cyperaceae | |
Rhynchospora arrojadii
| H. Pfeiff. | | |
| Cyperaceae | |
Rhynchospora articulata
| (Roxb.) Schult. | Mant. 2: 49 | 1824 |
| Cyperaceae | |
Rhynchospora arundinacea
| Boeckeler | Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 1879–80: 27 | 1879 |
| Cyperaceae | |
Rhynchospora asperula
| (Nees) Steud. | Syn. Pl. Glumac. 2: 144 | 1855 |
| Cyperaceae | |
Rhynchospora atlantica
| W.W. Thomas | Brittonia 72(3): 279 | 2020 |
| Cyperaceae | ** |
Rhynchospora auraeformis
| C.B. Clarke | Illustr. Cyp. , t. 71, f. 3 | 1909 |
| Cyperaceae | |
Rhynchospora aurea
| Vahl | Enum. Pl. 2: 229 | 1805 |
| Cyperaceae | |
Rhynchospora auriculata
| Boeckeler | Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 1869: 144 | 1869 |
| Cyperaceae | ! |
Rhynchospora austrobahiensis
| W.W. Thomas | Brittonia 72(3): 274-276, f. 1a–e, 2a | 2020 |
| Cyperaceae | |
Rhynchospora avenacea
| (R. Br.) Spreng. | Syst. Veg. [Sprengel] 1: 197 | 1825 [1824] |
| Cyperaceae | |
Rhynchospora axillaris
| (Lam.) Britton | Bull. Torrey Bot. Club 15(4): 104 | 1888 |
| Cyperaceae | |
Rhynchospora ayangannensis
| M.T. Strong | Novon 11(2): 263–266, f. 2 | 2001 |
| Cyperaceae | |
Rhynchospora bahamensis
| Britton | Torreya 13: 217 | 1913 |
| Cyperaceae | |
Rhynchospora bahiensis
| Steud. | Nomencl. Bot. (ed. 2) 2: 455 | 1841 |
| Cyperaceae | |
Rhynchospora baileyi
| Britton ex L.H. Bailey | Gentes Herbarum 2: 200, f. 103 | 1930 |
| Cyperaceae | |
Rhynchospora bakhuisensis
| M.T. Strong | Novon 11(2): 266–268, f. 3 | 2001 |
| Cyperaceae | |
Rhynchospora baldwinii
| A. Gray | Ann. Lyceum Nat. Hist. New York 3: 210, f. 19 | 1835 |
| Cyperaceae | |
Rhynchospora barbata
| (Vahl) Kunth | Enum. Pl. [Kunth] 2: 290 | 1837 |
| Cyperaceae | |
Rhynchospora barrosiana
| Guagl. | Darwiniana 22(3–4): 287, f. 11–13, 14 | 1979 |
| Cyperaceae | ! |
Rhynchospora belizensis
| Naczi & Silva Filho | Brittonia 72(1): 41-45, F. 1A-G, 2-4 | 2020 [2019] |
| Cyperaceae | ** |
Rhynchospora berterii
| (Spreng.) C.B. Clarke | | |
| Cyperaceae | ** |
Rhynchospora berteroana
| Boeckeler | Flora 41: 645 | 1858 |
| Cyperaceae | ! |
Rhynchospora berteroi
| (Spreng.) C.B. Clarke | Symb. Antill. 2(1): 119 | 1900 |
| Cyperaceae | |
Rhynchospora beyrichii
| (Nees) Steud. | Syn. Pl. Glumac. 2: 144 | 1855 |
| Cyperaceae | |
Rhynchospora biceps
| Torr. ex A. Gray | Ann. Lyceum Nat. Hist. New York 3: 219 | 1835 |
| Cyperaceae | |
Rhynchospora biflora
| Boeckeler | Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 1871: 156 | 1871 |
| Cyperaceae | |
Rhynchospora binervis
| Sieber ex C. Presl | Isis (Oken) 21: 269 | 1828 |
| Cyperaceae | |
Rhynchospora blauneri
| Britton | Bull. Torrey Bot. Club 50: 56 | 1923 |
| Cyperaceae | |
Rhynchospora blepharophora
| (J. Presl & C. Presl) H. Pfeiff. | Repert. Spec. Nov. Regni Veg. 38(6–12): 94 | 1935 |
| Cyperaceae | |
Rhynchospora boeckeleriana
| Silva Filho & Boldrini | Syst. Bot. 42(1): 181 | 2017 |
| Cyperaceae | |
Rhynchospora boivinii
| Boeckeler | Linnaea 38: 403 | 1874 |
| Cyperaceae | |
Rhynchospora bolivarana
| Steyerm. | Fieldiana, Bot. 28(1): 40, f. 5J–k | 1951 |
| Cyperaceae | |
Rhynchospora boliviensis
| C.B. Clarke | Bull. Misc. Inform. Kew, Addit. Ser. 8: 37–38 | 1908 |
| Cyperaceae | |
Rhynchospora boninensis
| Nakai ex Tuyama | | |
| Cyperaceae | |
Rhynchospora borinquensis
| Britton | Bull. Torrey Bot. Club 42: 387 | 1915 |
| Cyperaceae | ! |
Rhynchospora brachychaeta
| C. Wright | Anales Acad. Ci. Méd. Fís. Nat. Habana 8: 85 | 1871 |
| Cyperaceae | ** |
Rhynchospora brachychata
| C. Wright | Fl. Cub. 180 | 1873 |
| Cyperaceae | |
Rhynchospora bracteovillosa
| A.C. Araújo & W.W. Thomas | Brittonia 55(1): 31–33, f. 1 | 2003 |
| Cyperaceae | |
Rhynchospora bradei
| (R. Gross) W.W. Thomas | Brittonia 72(3): 279 | 2020 |
| Cyperaceae | |
Rhynchospora brasiliensis
| Boeckeler | Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 41–42: 26 | 1879 |
| Cyperaceae | |
Rhynchospora brevirostris
| Griseb. | Cat. Pl. Cub. 246–247 | 1866 |
| Cyperaceae | * |
Rhynchospora breviseta
| (Gale) Channell | Rhodora 58(696): 336 | 1956 |
| Cyperaceae | |
Rhynchospora breviseta
| Palla | Oesterr. Bot. Z. 59: 187 | 1909 |
| Cyperaceae | |
Rhynchospora breviuscula
| H. Pfeiff. | Repert. Spec. Nov. Regni Veg. 38(6–12): 95 | 1935 |
| Cyperaceae | |
Rhynchospora brittonii
| Gale | Rhodora 46: 241 | 1944 |
| Cyperaceae | |
Rhynchospora broadwayi
| (Kük.) Raymond | Naturaliste Canad. 99: 220 | 1972 |
| Cyperaceae | |
Rhynchospora bromoides
| Kunth | Enum. Pl. [Kunth] 2: 300 | 1837 |
| Cyperaceae | |
Rhynchospora brownii
| Roem. & Schult. | Syst. Veg. 2: 86 | 1817 |
| Cyperaceae | |
Rhynchospora bruneri
| Britton | Sci. Surv. Porto Rico & Virgin Islands 5: 103 | 1923 |
| Cyperaceae | |
Rhynchospora brunnea
| Willd. ex Kunth | Enum. Pl. [Kunth] 2: 297 | 1837 |
| Cyperaceae | |
Rhynchospora brunnea
| Boeckeler | Linnaea 37: 593 | 1871-1873 [1873] |
| Cyperaceae | |
Rhynchospora bucherorum
| León | Contr. Ocas. Mus. Hist. Nat. Colegio "De La Salle" 8: 226 | 1946 |
| Cyperaceae | |
Rhynchospora buchii
| Urb. | Symb. Antill. 7(2): 169 | 1912 |
| Cyperaceae | |
Rhynchospora bulbocaulis
| (Boeckeler) Boeckeler | Flora 62: 567 | 1879 |
| Cyperaceae | |
Rhynchospora bulbosa
| Vahl. | | |
| Cyperaceae | |
Rhynchospora burchellii
| C.B. Clarke | Bull. Misc. Inform. Kew, Addit. Ser. 8: 34 | 1908 |
| Cyperaceae | |
Rhynchospora cabecarae
| Gómez-Laur. | Novon 5(3): 270, f. 1 | 1995 |
| Cyperaceae | |
Rhynchospora cacuminicola
| Gale | Rhodora 46: 275 | 1944 |
| Cyperaceae | |
Rhynchospora caduca
| Elliott | Sketch Bot. S. Carolina 1(1): 62 | 1816 |
| Cyperaceae | |
Rhynchospora caduciglumis
| P. Weber & R. Trevis. | Phytotaxa 292(2): 196 | 2017 |
| Cyperaceae | |
Rhynchospora caesionux
| T. Koyama | Brittonia 24(3): 281, f. 1 J–T | 1972 |
| Cyperaceae | |
Rhynchospora caespitosa
| Huber | | |
| Cyperaceae | |
Rhynchospora cajennensis
| Boeckeler | Linnaea 38: 404 | 1874 |
| Cyperaceae | |
Rhynchospora calderana
| D.A. Simpson | Kew Bull. 42(4): 891 | 1987 |
| Cyperaceae | |
Rhynchospora californica
| Gale | Rhodora 46(547): 272–273, pl. 834, f. 1A–1B, map 60 | 1944 |
| Cyperaceae | |
Rhynchospora calyptrocaryoides
| (R. Gross) W.W. Thomas | Brittonia 72(3): 279-279 | 2020 |
| Cyperaceae | |
Rhynchospora campanulata
| Kük. | Repert. Spec. Nov. Regni Veg. 12(312–316): 95 | 1913 |