Opuntia Miller, The Gardeners Dictionary. Abridged. fourth edition unpaged, 1754

Opuntia abjecta

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 257, 1923

Opuntia abyssi

Hester, Cactus and Succulent Journal [U. S. ] 15 (12): 193, 1943

Opuntia acanthocarpa

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 308, 1856

Opuntia acanthocarpa ssp. acanthocarpa

Opuntia acanthocarpa ssp. ganderi

C.B. Wolf, Occasional Papers [Rancho Santa Ana Botanic Garden] 1: 75, 1938

Opuntia acanthocarpa v. coloradensis

L.D. Benson, The cacti of Arizona 20, 34, f. 1. 4, 1. 5, 1969

Opuntia acanthocarpa v. ganderi

Opuntia acanthocarpa v. major

(Engelmann & J. M. Bigelow) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia acanthocarpa v. ramosa

Peebles, Cactus and Succulent Journal [U. S. ] 9: 37, 1937

Opuntia acanthocarpa v. thornberi

(Thornb. & Bonker) L.D. Benson, Proceedings of the California Academy of Sciences, Series 4, 25 (2): 247, 1944

Opuntia acaulis

Ekman & Werdermann, Repertorium Specierum Novarum Regni Vegetabilis 29: 230, 1931

Opuntia aciculata

D. Griffiths, Proceedings of the Biological Society of Washington 29: 10, 1916

Opuntia aciculata v. orbiculata

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia acracantha

Walp., Rep. 2. 354,

Opuntia aequatorialis hyb.

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 219-220, f. 287-289, 1919

Opuntia affinis

D. Griffiths, Proceedings of the Biological Society of Washington 27: 27, 1914

Opuntia aggeria

B.E. Ralston & R.A. Hilsenbeck, Madrono; Journal of the California Botanical Society 36 (4): 226-228, f. 2, 1989

Opuntia agglomerata

A. Berger, Kakteen 58, 1929

Opuntia airampo

R. Philippi, Anales de la Universidad de Chile 85: 492, 1894

Opuntia alamosensis

Britton & Rose, Contributions from the U. S. National Herbarium 23 (5): 1676, 1926

Opuntia albata

Opuntia albicans

Salm-Dyck, Hort. Dyck. 361.,

Opuntia albicans v. laevior

Salm-Dyck, Cact. Hort. Dyck. 67, 237. 1850, 1849

Opuntia albicarpa

Scheinvar, Revista Jard. Bot. Nac. Univ. Habana 20: 167 (-169). 1999

Opuntia albiflora

K. Schumann, Gesamtb. Kakt. Nachtr. I. 152.,

Opuntia albisaetacens

Backeberg, Kaktus-ABC 127, 411, 1935

Opuntia albisaetacens v. robustior

Backeberg, Cactaceae (Backeberg) 6: 3617., 1962

Opuntia albisetosa

Hildmann ex Hirscht, Monatsschr. Kakteenk., 10. 48, in obs., pro syn., 1900

Opuntia albispinosa

Mieckley ex Lindemuth & Dams, Monatsschr. Kakteenk., 14. 178, in obs., nomen., 1904

Opuntia alcahes

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 1: 321, 1895

Opuntia alcerrecensis

J. Iliff, Cactaceae Consensus Initiatives 2: 9, 1997

Opuntia alexanderi

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 256, 1923

Opuntia alexanderi v. bruchii

(Spegazzini) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia alexanderi v. subsphaerica

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia alfagayucca

Karwinski ex Salm-Dyck, Cact. Hort. Dyck. ed. 2. 68,

Opuntia alfayucca

Karwinski ex Foerst., Ruempl. Handb. Kakteenk. ( ?) 938, sphalm., 1885

Opuntia alko-tuna

Cárdenas, Lilloa 23: 23, f. 3, 1950

Opuntia allairei

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 83-84, t. 5, t. 2, f. 2, t. 12, upper f., t. 13, f. 9, 1909

Opuntia alpicola

K. Schumann ex Dams, Monatsschr. Kakteenk., 13. 95, in obs., 1903

Opuntia alpina

Gill. ex Pfeiffer, Enum. Diagn. Cact. 146,

Opuntia alta

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 165166, t. 19, 20, upper fig., 1910

Opuntia amarilla

Griffiths, Bull. Torr. Bot. Cl., 46. 205., 1919

Opuntia ambigua

Link ex Tenore, Atti 7 Adun. Sci. Ital. 884, 1846

Opuntia ammophila

Small, Journal of the New York Botanical Garden 20: 29, 1919

Opuntia amyclaea

Tenore, Fl. Neap. Prod. App. 5: 15, 1826

Opuntia anacantha

Spegazzini, Bulletin du Museum d'Histoire Naturelle 10: 391, 1904

Opuntia anacantha v. kiska-loro

(Spegazzini) R. Kiesling, Candollea, 53 (2): 475: 1998

Opuntia anacantha v. retrorsa

(Spegazzini) R. Kiesling, Candollea, 53 (2): 475: 1998

Opuntia anacantha v. utkilio

(Spegazzini) R. Kiesling, Candollea, 53 (2): 476: 1998

Opuntia anahuacensis

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 92, 1916

Opuntia andicola

Pfeiffer, Enumeratio Diagnostica Cactearum 145, 1837

Opuntia andicola v. elongata

Lemaire, Cact. Gen. Sp. Nov. 72., 1839

Opuntia andicola v. fulvispina

Lemaire, Cact. Gen. Sp. Nov. 72., 1839

Opuntia andicola v. major

Lemaire, Cact. Gen. Sp. Nov. 72., 1839

Opuntia angusta

Meinsh., C. Koch & Fint. Wochenschr. 1. 30., 1858

Opuntia angustata

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 292, 1857

Opuntia angustata v. comonduensis

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 425, 1896

Opuntia anteojoensis

D.J.Pinkava, Madrono; Journal of the California Botanical Society 23 (5): 293, f. 5, 1976

Opuntia antillana

Britton & Rose, Brooklyn botanic garden memoirs 1: 73, 1918

Opuntia aoracantha

Lemaire, Cactearum aliquot novarum 34, 1838

Opuntia apurimacensis

(F. Ritter) R. Crook & R. Mottram, Bradleya; Yearbook of the British Cactus and Succulent Society 13: 100, 1995

Opuntia aquosa

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 4: 165, 1898

Opuntia arborea

Steud., Nom. ed. 2. 2. 220.,

Opuntia arborescens

Engelmann, Memoir of a Tour to Northern Mexico 90, 1848

Opuntia arborescens v. versicolor

Dams, Monatsschrift fur Kakteenkunde 14: 3, 1904

Opuntia arbuscula

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 309, 1857

Opuntia arbuscula v. congesta

(Griffiths) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia arcei

Cárdenas, Cactus and Succulent Journal [U. S. ] 28: 113, f. 77-78, 1956

Opuntia archiconoidea

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia arechavaletae

Spegazzini, Anal. Mus. Buenos Aires, 11. 520.,

Opuntia arenaria

Engelmann, Proc. Amer. acad. 3: 301, 1856

Opuntia argentina

Grisebach, Symbolae ad Floram Argentinam. Zweite . 140, 1874

Opuntia arizonica

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 93-94, t. 10, t. 2, f. 8, t. 13, f. 8, 1909

Opuntia arkansana

Engelmann ex Hirscht, Monatsschrift fur Kakteenkunde 8: 115, 1898

Opuntia armata

Backeberg, Cactus (Paris) 38: 250, 1953

Opuntia armata v. panellana

Backeberg, Descr. Cact. Nov. 9., 1956

Opuntia arrastradillo

Backeberg, Cactus (Paris) 8 (36): 181, 1953

Opuntia articulata

(Pfeiffer) D.R. Hunt, Bradleya; Yearbook of the British Cactus and Succulent Society 5: 93, 1987

Opuntia asplundii

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 5, 1958

Opuntia assumptionis

K. Schumann, Monatsschrift fur Kakteenkunde 153, 1899

Opuntia atacamensis

R. Philippi, Florula Atacamensis seu enumeriation . 24, 1860

Opuntia atrispina

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 172-173, t. 26. lower fig., 1910

Opuntia atrocapensis

Small, Manual of the Southeastern Flora 905, 1506, 1933

Opuntia atroglobosa

(Backeberg ex F. Ritter) R. Crook & R. Mottram, Bradleya; Yearbook of the British Cactus and Succulent Society 13: 106, 1995

Opuntia atropes

Rose, Smithsonian Miscellaneous Collections 50: 518, 1908

Opuntia atrovirens

Spegazzini, Anales de Sociedad Cientifica Argentina 99: 91, 1925

Opuntia atroviridis

Werdermann & Backeberg, Neue Kakteen 63, 1931

Opuntia atroviridis f. longicylindrica

(Rauh & Backeberg) Krainz, Die Kakteen, 1970

Opuntia atroviridis f. parviflora

(Rauh & Backeberg) Krainz, Die Kakteen, 1970

Opuntia atroviridis f. paucispina

(Rauh & Backeberg) Krainz, Die Kakteen, 1970

Opuntia auberi

Pfeiffer, Allgemeine Gartenzeitung 8: 282, 1840

Opuntia aulacothele

F.A.C. Weber, Bull. Mus. HIst. Nat. Par., 392., 1904

Opuntia aurantiaca

Lindl., Edwards's Botanical Register 19: pl. 1606, 1833

Opuntia aurea

Baxter, Cactus and Succulent Journal [U. S. ] 489, 1933

Opuntia aureispina

(Brack & Heil) D.J. Pinkava & B.D. Parfitt, Sida 13 (2): 128, 1988

Opuntia australis

F.A.C. Weber, Dictionaire d'Horticulture 896, 1898

Opuntia austrina

Small, Flora of the Southeastern United States . 816, 1335, 1903

Opuntia azurea

Rose, Contributions from the U. S. National Herbarium 12 (7): 291, t. 24, f. 33, 1909

Opuntia backebergii

G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia bahamana

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 203, f. 254-255, 1919

Opuntia bahiensis

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 210-211, f. 271, 1919

Opuntia bakeri hyb.

J.E. Madsen, Flora of Ecuador 35: 47, 1989

Opuntia balearica

Weber ex Hirscht, Monatsschr. Kakteenk., 8. 175, in obs., pro syn., 1898

Opuntia ballii

Rose, Contributions from the U. S. National Herbarium 13 (9): 309, t. 64, 1911

Opuntia barbata

K. Brandegee ex J.A. Purpus, Monatsschr. Kakteenk., 10. 97, in obs., 1900

Opuntia barbata v. gracillima

K. Brandegee ex J. A. Purpus, Monatsschr. Kakteenk. 10: 110, 120., 1900

Opuntia barkleyana

(Daston) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia bartramii

Rafin., Atlantic Journal 146, 1832

Opuntia basilaris

Engelmann & J. M. Bigelow, Proc. Amer. Acad. 3: 298, 1856

Opuntia basilaris ssp. whitneyana

(E.M. Baxter) Munz, Aliso 4 (1): 94, 1958

Opuntia basilaris v. albiflorus

F.A. Walton 

Opuntia basilaris v. basilaris

 

Opuntia basilaris v. brachyclada

(Griffiths) Munz ex L.D. Benson, Nat. Cacti Calif. 128, 1969

Opuntia basilaris v. cordata

Fobe, Monatsschrift fur Kakteenkunde 16: 46, 1906

Opuntia basilaris v. heilii

S.L. Welsh & Neese, Great Basin Naturalist 43 (4): 700, 1983 [1984]

Opuntia basilaris v. humistrata

(Griffiths) W.T. Marshall, Cactaceae 65, 1941

Opuntia basilaris v. longiareolata

(Clover & Jotter) L. D. Benson, Cacti Ariz. 2nd. ed. 43., 1950

Opuntia basilaris v. ramosa

Parish, Bulletin of the Torrey Botanical Club 19: 92, 1892

Opuntia basilaris v. treleasei

(J.M. Coulter) Toumey 

Opuntia basilaris v. woodburyi

W. Earle, Saguaroland Bulletin 34: 15, 1980

Opuntia beckeriana

K. Schumann, Gesamtb. Kakt. 1. 722.,

Opuntia bella

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 111, f. 137-139, 1919

Opuntia bensonii

H. Sánchez-Mejorada R., Cactaceas y suculentas mexicanas 17 (2): 47, f. 40, 1972

Opuntia bentonii

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 25, 1912

Opuntia bergeriana

F.A.C. Weber, Gardener's chronicle, ser. 3 35: 34, 1904

Opuntia bernardina

Engelmann ex Parish, Bulletin of the Torrey Botanical Club 19: 92, 1892

Opuntia bernichiana hyb.

 

Opuntia berteri

(Colla) A.E. Hoffmann J., Cactaceas en la flora silvestre de Chile: 244: 1989

Opuntia bicolor

R. Philippi, Linnaea 33: 83, 1864

Opuntia bigelovii

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 307, 1856

Opuntia bigelovii v. bigelovii

 

Opuntia bigelovii v. hoffmannii

Fosberg, Bulletin of the Southern California Academy of Sciences 32: 121, 1933

Opuntia bisetosa

Pittier, Journal of the Washington Academy of Sciences 26: 42, 1936

Opuntia bispinosa

Backeberg, Cactus, Paris, No. 75, 32; Backeb. Cactac. Handb. Kakteenk. 6. 3607 (1962). 1962

Opuntia blakeana

Rose, Contributions from the U. S. National Herbarium 12: 402, 1909

Opuntia blancii

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia boldinghii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 155, t. 26, f. 3, 1919

Opuntia boliviana

Salm-Dyck, Allgemeine Gartenzeitung 13: 388, 1845

Opuntia boliviensis

Backeberg, Kaktus-ABC 128, 411, 1935

Opuntia bonaerensis

Spegazzini, Contr. Flora Tandil 18, 1901

Opuntia bonplandii

(Kunth) F.A.C. Weber, Enumeratio Diagnostica Cactearum,

Opuntia borinquensis

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 103-104, f. 126, 1919

Opuntia brachyacantha

(F. Ritter) R. Crook & R. Mottram, Bradleya, 13: 115: 1995

Opuntia brachyarthra

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 302, 1856

Opuntia brachyclada

D. Griffiths, Proceedings of the Biological Society of Washington 27: 25, 1914

Opuntia brachyclada ssp. brachyclada

 

Opuntia brachyclada ssp. humistrata

(Griffiths) Wiggins & C.B. Wolf, Ill. Fl. Pacific States 3: 148., 1951

Opuntia brachydelphis

K. Schumann, Kuntze, Rev. Gen. 3. 2. 107,

Opuntia brachyrhopalica

(Daston) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia bradleyi

G.D. Rowley, National Cactus and Succulent Journal 13: 4, 1958

Opuntia bradtiana

(J.M. Coulter) K. Brandegee, Erythea 5: 121, 1897

Opuntia brandegeei

K. Schumann, Gesamtbeschreibung der Kakteen 1: 652, 1898

Opuntia brasiliensis

(Willd.) Haworth, Supplementum Plantarum Succulentarum . 79, 1819

Opuntia brasiliensis ssp. bahiensis

(Britton & Rose) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 132: 1995

Opuntia brasiliensis ssp. subacarpa

(C.T. Rizzini & A. Mattos) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 132: 1995

Opuntia bravoana

Baxter, Anales del Instituto de Biologia de la Universidad Nacional de Mexico 4: 149, 1933

Opuntia brevispina

H. E. Gates, Cactus and Succulent Journal [U. S. ] 10: 98, 19938

Opuntia brittoni

J.G. Ortega, Mex. Forest 4 (4): 68, 1928

Opuntia bruchii

Spegazzini, Physis. Revista de la Sociedad Argentina de Ciencias Naturales 8: 239, 1925

Opuntia bruchii f. macracantha

Spegazzini, Revista Argent. Bot. 1: 202., 1926

Opuntia brunneogemmia

(F. Ritter) C. Schlindwein, Bradleya, 13: 29: 1995

Opuntia brunnescens

Britton & Rose, Cactaceae, 1. 150., 1919

Opuntia bulbispina

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 304-305, 1856

Opuntia burrageana

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 70-71, t. 14, f. 1, 1919

Opuntia cacanapa

Griffiths & Hare, New Mexico Agricultural Experiment Station: Bulletin 60: 47, 1906

Opuntia cacanapa v. ellisiana

 

Opuntia cacanapa v. nova

 

Opuntia caerulescens

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 86-87, t. 6, upper f., t. 2, f. 9, 1909

Opuntia caesia

Griffiths, Proc. Biol. Soc. Wash., 29. 13., 1916

Opuntia caespitosa

Rafin., Bulletin Botanique [Geneve] 216, 1830

Opuntia cafayatensis

 

Opuntia calacantha

Forbes ex Baxt., Loud. Hort. Brit. Suppl. 3. 599, nomen.,

Opuntia calantha

Griffiths, Bull. Torr. Bot. Cl, 43. 524., 1916

Opuntia calcicola

Wherry, Journal of the Washington Academy of Sciences 16: 12, f. 1, 1926

Opuntia californica

Engelmann, Notes of a Military Reconnoissance 2: 158, 1848

Opuntia californica v. californica

 

Opuntia californica v. parkeri

(J.M. Coulter) D.J. Pinkava, Haseltonia 4: 103, 1996

Opuntia californica v. serpentina

 

Opuntia calmalliana

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 453, 1896

Opuntia calva

Lemaire, Cact. Gen. Sp. Nov. 73,

Opuntia camachoi

Espinosa, Revista Chilena de Historia Natural 37: 126, 1933

Opuntia camanchica

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 293, 1856 [1857]

Opuntia campestris

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 99, f. 120, 1919

Opuntia campii

M.A. Baker & D.J. Pinkava, Cact. Succ. J. (U. S. A.), 71 (6): 320, 1999

Opuntia camuessa

F.A.C. Weber, Dictionaire d'Horticulture 895, 1898

Opuntia canada

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 90-91, t. 6, lower f., t. 2, f. 6, t. 13, f. 2, 12, 1909

Opuntia candelabriformis

Hort. Monac. ex Pfeiffer, Enum. Diagn. Cact. 159.,

Opuntia candelabriformis v. rigidior

Salm-Dyck, Cact. Hort. Dyck. 68, 241. 1850, 1849

Opuntia canina

Spegazzini, Anal. Mus. Buenos Aires, 11. 518.,

Opuntia cantabrigiensis

Lynch, Gardener's chronicle, ser. 3 33: 98, 1903

Opuntia canterai hyb.

Arechavaleta, Anales del Museo Nacional de Montevideo 5: 278, 1905

Opuntia caracassana

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 238, 1850

Opuntia cardenche

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 259-260, t. 21, 1908

Opuntia cardiosperma

K. Schumann, Monatsschrift fur Kakteenkunde 9: 150, 1899

Opuntia cardona

F.A.C. Weber, Dictionaire d'Horticulture 895, 1898

Opuntia caribaea

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 49, f. 59, 1919

Opuntia carnosa

Usteri, Guia Bot. Praca Rep. e Jard. Luz, 27., 1919

Opuntia carolina

Forbes, Hort. Tour Germ. 160, nomen.,

Opuntia carreana

 

Opuntia carrizalensis

R. Philippi, ex K. Schum. Gesamtb. Kakt., Nachtr., 152, pro syn., 1903

Opuntia castillae

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 261-262, t. 24, 1908

Opuntia catingicola hyb.

Werdermann, Notizbl. Bot. Gart. Berlin, 12. 223., 1934

Opuntia catocantha

Hort. Berol. ex Pfeiffer, Enum. Diagn. Cact. 166.,

Opuntia cedergreniana

Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 128, 411., 1935

Opuntia cereiformis

F.A.C. Weber, Dictionaire d'Horticulture 897, 1898

Opuntia cervicornis

Spath, Cat. -7. 156; cf. Kew Bull. 1907, App. 3. 74, hybr. ?, 1906

Opuntia cespitosa

Rafin., Ser. Bull. Bot. 216, 1830

Opuntia chaetocarpa

Griffiths, Proc. Biol. Soc. Wash., 27. 25., 1914

Opuntia chaffei

 

Opuntia chaffeyi

Britton & Rose, Contributions from the U. S. National Herbarium 16 (7): 241, t. 72, 1913

Opuntia chakensis

Spegazzini, Anal. Mus. Buenos Aires, 11. 519., 1905

Opuntia chapistle

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 10: 388, 1904

Opuntia charlestonensis

Clokey, Madrono; Journal of the California Botanical Society 7: 71, 1943

Opuntia chata

Griffiths, Bull. Torrey Bot. Club 46: 199. 1919,

Opuntia chavena

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 264-265, t. 23, lower fig., 1908

Opuntia chella

Weber., Bull. Mus. Hist. nat. Paris. 1. 320., 1895

Opuntia chichensis

(Cárdenas) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia chichensis v. colchana

(Cárdenas) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia chihuahuensis

Rose, Contributions from the U. S. National Herbarium 12 (7): 291-292, 1909

Opuntia chilensis

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13: 5, 1958

Opuntia chinensis

K. Koch, Hortus Dendrologicus 279, no. 6, 1853

Opuntia chisosensis

(Anthony) D.J. Ferguson, Cactus and Succulent Journal [U. S. ] 58 (3): 124, 1986

Opuntia chlorotica

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 291, 1856

Opuntia chlorotica v. gosseliniana

(Weber) D.J. Ferguson, Cact. Succ. J. (U. S. A.), 60 (4): 159: 1988

Opuntia chlorotica v. nova

 

Opuntia chlorotica v. santarita

Griffiths & Hare, New Mexico Agricultural Experiment Station: Bulletin 60: 64, 1906

Opuntia cholla

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 1: 320, 1895

Opuntia chrysacantha

 

Opuntia chrysantha

 

Opuntia chuquisacana

Cárdenas, Lilloa 23: 20, f. 2, 1950

Opuntia cineracea

Wiggins, Contributions from the Dudley Herbarium 3: 285, 1943

Opuntia cintiensis

 

Opuntia ciribe

Engelmann, Contributions from the U. S. National Herbarium 3: 445, 1896

Opuntia clavarioides

Pfeiffer, Enumeratio Diagnostica Cactearum 173, 1837

Opuntia clavarioides f. cristata

Schelle, Handb. Kakteenkult. [Schelle] 43., 1907

Opuntia clavarioides v. ruiz-lealii

(A. Cast.) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia clavata

Engelmann, Memoir of a Tour to Northern Mexico 95, 1848

Opuntia clavellina

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3: 444, 1896

Opuntia coccinea

Hort. ex Pfeiffer, Enum. Diagn. Cact. 161,

Opuntia coccinellifera

Steud., Nom. ed. 2. 2. 220,

Opuntia cochabambensis

Cárdenas, Revista de Agricultura [Cochabamba] 9: 20, 1955

Opuntia cochenillifer

Karst., Deutsche Fl. 888 (-83), in obs., 1880

Opuntia cochenillifera

(L.) Mill., The Gardeners Dictionary: eighth edition Opuntia no. 6, 1768

Opuntia cochinera

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 263-264, t. 26, 1908

Opuntia coerulea

Gill. ex Pfeiffer, Enum. Diag. Cact. 155,

Opuntia cognata

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 132, 1995

Opuntia coindetti

F. A. C. Weber in Bois, Dict. Hort. 2: 895., 1898

Opuntia colorea

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia colubrina

A. Castellanos, Lilloa 27: 81, f. 1, 1955

Opuntia columbiana hyb.

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 523, 1916

Opuntia comonduensis

(J.M. Coulter) Britton & Rose, Smithsonian Miscellaneous Collections 50: 519, 1908

Opuntia compressa

(Salisb.) J.F. Macbride, Contributions from the Gray Herbarium of Harvard University 65: 41, 1922

Opuntia compressa v. allairei

(Griffiths) D. Weniger, Cacti Southwest 207, 1970

Opuntia compressa v. ammophila

(Small) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 124, 1969

Opuntia compressa v. austrina

(Small) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia compressa v. fuscoatra

(Engelmann) D. Weniger, Cacti Southwest 207, 1971

Opuntia compressa v. humifusa

D. Weniger, Cacti S. W. 202, 1970

Opuntia compressa v. macrorhiza

(Engelmann) L.D. Benson, Cact. Ariz. 50, 1950

Opuntia compressa v. microsperma

(Engelmann) L. D. Benson, Proceedings of the California Academy of Sciences, Series 4, 25: 250, 1944

Opuntia compressa v. stenochila

(Engelmann & J. M. Bigelow) D. D. Weniger, Cacti Southwest 211, 1970

Opuntia confusa

D. Griffiths, Proceedings of the Biological Society of Washington 27: 28, 1914

Opuntia congesta

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 88-89, t. 8, t. 2, f. 4, 7, f. 13, f. 5, 1909

Opuntia conjungens

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 133, 1995

Opuntia conoidea

(F. Ritter) G.D. Rowley, National Cactus and Succulent Journal 13: 25, 1958

Opuntia convexa

Mackensen, Bulletin of the Torrey Botanical Club 39: 291, 1912

Opuntia corallicola

(Small) Backeberg, Neue Kakteen, 1931

Opuntia cordata

 

Opuntia cordobensis

Spegazzini, Anales del Museo Nacional de Buenos Aires 11: 513,

Opuntia cordona

 

Opuntia corotilla

K. Schumann ex D. Vaupel, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 50 (2-3, Beibl. 111): 28-29, 1913

Opuntia corotilla v. aurantiaciflora

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia corotilla v. corotilla

 

Opuntia corrugata

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1844] 43, 1844

Opuntia corrugata v. monvillii

Salm-Dyck, Cact. Hort. Dyck. 72. 1850, 1849

Opuntia costigera

Miq., Nederl. Kruidk. Arch. 4. 838., 1859

Opuntia covillei

Britton & Rose, Smithsonian Miscellaneous Collections 50: 532, 1908

Opuntia covillei v. covillei

 

Opuntia covillei v. peircei

Munz, Man. S. Calif. Bot. 327., 1935

Opuntia covillei v. piercei

(Fosberg) Munz, A Manual of Southern California Botany 327, 1935

Opuntia crassa

Haworth, Supplementum Plantarum Succulentarum . 81, 1819

Opuntia crassa v. major

Pfeiffer, Enumeratio Diagnostica Cactearum 153, 1837

Opuntia crassicylindrica

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia crassispina

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia cretochaeta

D. Griffiths, Proceedings of the Biological Society of Washington 29: 11, 1916

Opuntia crinifera

Salm-Dyck, Enumeratio Diagnostica Cactearum 157, 1837

Opuntia crinifera v. lanigera

Pfeiffer, Enumeratio Diagnostica Cactearum 157, 1837

Opuntia crispicrinita

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia crispicrinita subvar. flavicoma

 

Opuntia crispicrinita v. cylindracea

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia crispicrinita v. tortispina

(Rauh & Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia cristata

Salm-Dyck, Cact. Hort. Dyck. ed. I. 49; et ed. 2. 78,

Opuntia cruciata

Hort ex Pfeiffer, Enum. Diagn. Cacl. 167,

Opuntia crystalenia

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 528, 1916

Opuntia cubensis hyb.

Britton & Rose, Torreya 12: 14, 1912

Opuntia cucumiformis

Griffiths, Bull. Torr. Bot. Cl., 43. 524., 1916

Opuntia cuija

(Griffiths & Hare) Britton & Rose, Smithsonian Miscellaneous Collections 50: 529, 1908

Opuntia cumingii

Hort. ex Schelle, Handb. Kakteenk. 46, in syn., 1907

Opuntia cumulicola

Small, Manual of the Southeastern Flora 907, 1506, 1933

Opuntia curassavica

(L.) Mill., The Gardeners Dictionary: eighth edition Opuntia no. 7, 1768

Opuntia curassavica v. colombiana

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia curassavica v. longa

Haworth, Revis. Pl. Succ. 71., 1821

Opuntia curvispina hyb.

Griffiths (pro sp.), Bulletin of the Torrey Botanical Club 43: 88, 1916

Opuntia cyamella

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 30, t. 9-10, 1910

Opuntia cyanea

Griffiths, Bull. Torrey Bot. Club 46: 196. 1919,

Opuntia cyanella

Griffiths, Rep. (Annual) Missouri Bot. Gard. 22: 30, pl. 9, 10., 1912

Opuntia cyclodes

(Engelmann & J. M. Bigelow) Rose, Contributions from the U. S. National Herbarium 13 (9): 309, 1911

Opuntia cylindrarticulata

(Cárdenas) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia cylindrica

(Lam.) DC., Prodromus Systematis Naturalis Regni Vegetabilis 3: 471, 1828

Opuntia cylindrolanata

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia cymochila

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 295, 1856

Opuntia cymochila cv. Malpais Glory

 

Opuntia cymochila v. cymochila

 

Opuntia cymochila v. montana

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 296, 1857

Opuntia dactylifera

D. Vaupel, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 50 (2-3, Beibl. 111): 29, 1913

Opuntia darrahiana

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 1904: 388, 1904

Opuntia darwinii

Hensl., Magazine of Zoology and Botany 1: 466, 1837

Opuntia davisii

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 305, 1856

Opuntia deamii

Rose, Contributions from the U. S. National Herbarium 13 (9): 309, pl. 65, 1911

Opuntia decipiens

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 118, 1828

Opuntia decumana

(Willd.) Haworth, Supplementum Plantarum Succulentarum . 71, 1821

Opuntia decumbens

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 361, 1834

Opuntia decumbens v. longispina

Eichlam, Monatsschr. Kakteenk. 21: 116., 1911

Opuntia decumbens v. scheinvariana

E. Paniagua 

Opuntia deflexa

Lemaire, Cact. Gen. Sp. Nov. 68,

Opuntia dejecta

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 361, 1834

Opuntia delaetiana

Weber, Monatsschr. Kakteenk., 14. 166, in obs., nomen; Vaupel, Bluhende Kakteen, 37. t. 148 (1913), descr. Vaupel, Bluhende Kakteen, 1904, 14. 166, in obs., nomen; 37. t. 148 (1913), descr., 1904

Opuntia delicata

Rose, Contributions from the U. S. National Herbarium 13 (9): 310, 1911

Opuntia deltica

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 84, 1916

Opuntia demissa hyb.

D. Griffiths, Rep. (Annual) Missouri Bot. Gard. 22: 29, pl. 8., 1912

Opuntia demorenia

Forbes, Hott. Tour Germ. 160, nomen,

Opuntia demoriana

Hort. Monac. ex Foerst., Handb. Cact. ed. I. 508, nomen.,

Opuntia densiaculeata

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 4, 1958

Opuntia densispina

B.E. Ralston & R.A. Hilsenbeck, Madrono; Journal of the California Botanical Society 39 (4): 281-284, f. 1, 1992

Opuntia denudata

F. A. C. Weber, Dict. Hort. 2: 897., 1898

Opuntia depauperata

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 216, f. 279, 1919

Opuntia deppei

Wendl. ex Foerst., Handb. Cact. ed. I. 508, nomen.,

Opuntia depressa

Rose, Smithsonian Miscellaneous Collections 50: 517, 1908

Opuntia deserta

D. Griffiths, Monatsschrift fur Kakteenkunde 2: 132, 1913

Opuntia diademata

Lemaire, Cact. Aliq. Nov. Desc. 36.,

Opuntia diademata f. calva

(Lemaire) Schelle, Handb. Kakteenkult. [Schelle] 45., 1907

Opuntia diademata v. calva

 

Opuntia diademata v. inermis

Spegazzini, Anales Mus. Nac. Buenos Aires (ser. 3) 4: 511., 1905

Opuntia diademata v. oligacantha

Spegazzini, Anales Mus. Nac. Buenos Aires (ser. 3) 4: 511., 1905

Opuntia diademata v. polyacantha

Spegazzini, Anales Mus. Nac. Buenos Aires (ser. 3) 4: 511., 1905

Opuntia dichotoma

Hort. ex Forbes, Hort. Tour Germ. 157.,

Opuntia diffusa

Hott. ex Pfeiffer, Enum. Diagn. Cact. 159,

Opuntia digitalis

A. Web., Bois, Dict. Hortic. 898,

Opuntia digueti

A. Weber, Bulletin du Museum d'Histoire Naturelle 4: 166, 1898

Opuntia dillei

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 82-83, t. 4, lower f., t. 2, f. 10, t. 13, t. 7, 1909

Opuntia dillenii

(Ker Gawl.) Haworth, Supplementum Plantarum Succulentarum . 79, 1819

Opuntia dillenii v. minor

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 185, 1834

Opuntia dillenii v. orbiculata

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 67, 1849 [1850]

Opuntia dillenii v. reitzii

L. Scheinvar, Feddes Repert., 95 (5-6): 277, 1984

Opuntia dillenii v. tehuantepecana

H. Bravo Hollis, Cactaceas y suculentas mexicanas 9: 55, 1969

Opuntia dimorpha

C. F. Forster, Hamburger Garten- und Blumenzeitung 17: 167, 1861

Opuntia dimorpha v. pseudorauppiana

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia diplacantha

Hort. ex A. Berger, Hort. Mortol. 232, nomen., 1912

Opuntia discata

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 266-267, t. 27, upper fig., 1908

Opuntia discolor

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 218, f. 282, 1919

Opuntia distans

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 155-156, f. 195, 1919

Opuntia diversispina

Griffiths, Bull. Torrey Bot. Club 46: 197, pl. 9. 1919,

Opuntia dobbieana

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 225, f. 301, 1919

Opuntia dolabriformis

Hort. ex Pfeiffer, Enum. Diagn. Caut. 167,

Opuntia domeykoensis

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia domingensis

Britton & Rose ex Urb., Symb. Antill. 8. 466, nomen; Britton & Rose, Cactaceae, 4. 259 (1923), in obs.,, 1920

Opuntia drummondii

R. Graham, Botanist 5: t. 246, 1846

Opuntia dulcis

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 291, 1857

Opuntia dumetorum

A. Berger, Kakteen 58, 1929

Opuntia durangensis

Britton & Rose, Smithsonian Miscellaneous Collections 50 (4): 518, 1908

Opuntia duvalioides

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 5, 1958

Opuntia duvalioides v. albispina

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia eborina

Foerst. ex Haage, Verz. Cact. 29,

Opuntia eburnea

Lemaire, Cact. Aliq. Nuv. Desc. 85,

Opuntia eburnispina hyb.

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 260, 1923

Opuntia echinacea

(F. Ritter) A.E. Hoffmann J., Cactaceas en la flora silvestre de Chile: 248: 1989

Opuntia echinocarpa

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 305, 1856

Opuntia echinocarpa v. echinocarpa

 

Opuntia echinocarpa v. major

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 305, 1856

Opuntia echinocarpa v. nuda

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 446, 1896

Opuntia echinocarpa v. parkeri

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 446, 1896

Opuntia echinocarpa v. robustior

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 446, 1896

Opuntia echinocarpa v. wolfii

L.D. Benson, Cact. Calif. 93, 1969

Opuntia echios

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 49, 1933

Opuntia echios ssp. gigantea

 

Opuntia echios v. barringtonensis

E.Y. Dawson, Cactus and Succulent Journal [U. S. ] 34: 104, 1962

Opuntia echios v. echios

 

Opuntia echios v. gigantea

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 51, 1933

Opuntia echios v. inermis

E.Y. Dawson, Cactus and Succulent Journal [U. S. ] 34: 103, 1962

Opuntia echios v. prolifera

E.Y. Dawson, Cactus and Succulent Journal [U. S. ] 34: 104, 1962

Opuntia echios v. typica

J. T. Howell, Proc. Calif. Acad. Sci. 21: 51., 1933

Opuntia echios v. zacana

(Howell) E.F. Anderson & Walk., Madrono; Journal of the California Botanical Society 20: 256, 1970

Opuntia edwardsii

V.E. Grant & K.A. Grant, Botanical Gazette 140 (2): 205, 1979

Opuntia effulgia

Griffiths, Bull. Torrey Bot. Club 46: 195. 1919,

Opuntia eichlamii

A. Berger, Contributions from the U. S. National Herbarium 13 (9): 310, pl. 66, 1911

Opuntia ekmanii

Werdermann, Repertorium Specierum Novarum Regni Vegetabilis 29: 225, 1931

Opuntia elata

Link & Otto ex Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 861, 1834

Opuntia elata v. delaetiana

F. A. C. Weber, Bull. Mus. Hist. Nat. (Paris) 10: 392., 1904

Opuntia elata v. oblongata

E. Walther, J. Cact. Succ. Soc. Amer. 1: 204, figs. 2, 4., 1930

Opuntia elata v. obovata

E. Walther, J. Cact. Succ. Soc. Amer. 1: 204, figs. 2, 4., 1930

Opuntia elatior

Miller, The Gardeners Dictionary: eighth edition Opuntia no. 4, 1768

Opuntia elizondoana

E. Sanchez-Mejorada & Villasenor, Acta Botanica Mexicana 27: 1, 1994

Opuntia ellemeetiana

Miquel, Nederlandsch Kruidkundig Archief. Verslangen en Mededelingen der Nederlandsche Botanische Vereeniging 4: 337, 1858

Opuntia ellisiana hyb.

D.A. Griffiths, Annual Report of the Missouri Botanical Garden 21: 170-171, t. 25, 1910

Opuntia elongata

Haworth, Suppl. Pl. Succ. 81,

Opuntia elongata v. laevior

Salm-Dyck, Cact. Hort. Dyck. 242. 1850, 1849

Opuntia emoryi

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 304, 1856

Opuntia engelmannii

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 67, 235, 1849 [1850]

Opuntia engelmannii f. littoralis

(Engelm.) Schelle, Geological Survey of California, Botany 1: 248, 1876

Opuntia engelmannii f. occidentalis

 

Opuntia engelmannii ssp. occidentalis

 

Opuntia engelmannii v. aciculata

(Griffiths) D. Weniger, Cacti S. W. 178, 1969

Opuntia engelmannii v. alta

(Griffiths) D. Weniger, Cacti S. W. 175, 1970

Opuntia engelmannii v. cacanapa

(Griffiths & Hare) D. Weniger, Cacti S. W. 177, 1970

Opuntia engelmannii v. cuija

Griffiths & Hare, New Mexico Agricultural Experiment Station: Bulletin 60: 44, t. 2, 1906

Opuntia engelmannii v. cyclodes

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 291, 1857

Opuntia engelmannii v. dillei

 

Opuntia engelmannii v. discata

(Griffiths) A. Nelson, Transactions of the Academy of Science 12: 124, 1919

Opuntia engelmannii v. dulcis

(Engelmann) J.M. Coulter ex K. Schumann, Gesamtbeschreibung der Kakteen 725, 1898

Opuntia engelmannii v. engelmannii

 

Opuntia engelmannii v. flavescens

(Peebles) L.D. Benson, Cacti Ariz. 58, 1950

Opuntia engelmannii v. flavispina

(L.D. Benson) B.D. Parfitt & D.J. Pinkava, Madrono; Journal of the California Botanical Society 35 (4): 348, 1988

Opuntia engelmannii v. flexospina

(Griffiths) B.D. Parfitt & D.J. Pinkava, Madrono; Journal of the California Botanical Society 35 (4): 348, 1988

Opuntia engelmannii v. lindheimeri

(Engelmann) B.D. Parfitt & D.J. Pinkava, Madrono; Journal of the California Botanical Society 35 (4): 346-347, 1988

Opuntia engelmannii v. linguiformis

(Griffiths) B.D. Parfitt & D.J. Pinkava, Madrono; Journal of the California Botanical Society 35 (4): 347, 1988

Opuntia engelmannii v. littoralis

 

Opuntia engelmannii v. megacarpa

(Griffiths) Fosberg, Bulletin of the Southern California Academy of Sciences 33: 100, 1924

Opuntia engelmannii v. occidentalis

Engelmann 

Opuntia engelmannii v. subarmata

(Griffiths) D. Weniger, cacti S. W. 180, 1970

Opuntia engelmannii v. texana

(Griffiths) D. Weniger, Cacti S. W. 174, 1970

Opuntia engelmannii v. wootonii

Fosberg, Bull. S. Calif. Acad. Sci. 30: 59., 1931

Opuntia eocarpa

Griffiths, Proc. Biol. Soc. Wash., 29. 11., 1916

Opuntia erecta

Hort. ex K. Schumann, Monatsschr. Kakteenk., 11. 181, in obs., nomen., 1901

Opuntia erectoclada

Backeberg, Kaktus-ABC 128, 411, 1935

Opuntia erinacea

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 301, 1856

Opuntia erinacea v. aurea

(E. M. Baxter) S.L. Welsh, Great Basin Naturalist 46 (2): 255, 1986

Opuntia erinacea v. columbiana

(Griffiths) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 124, 1969

Opuntia erinacea v. erinacea

 

Opuntia erinacea v. hystricina

(Engelmann & J. M. Bigelow) L.D. Benson, Cact. Ariz. 46, 1940

Opuntia erinacea v. paucispina

Dunkle, Bulletin of the Southern California Academy of Sciences 34: 3, 1935

Opuntia erinacea v. rhodantha

(K. Schumann) L. D. Benson, Proc. Calif. Acad. Sci. 14th ser. 25: 249., 1944

Opuntia erinacea v. ursina

(F.A.C. Weber) Parish, A Flora of California 2: 542, 1936

Opuntia erinacea v. utahensis

(Engelmann) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia erinacea v. xanthostemma

(K. Schumann) L.D. Benson 

Opuntia erythrocentron

Lemaire, Handbuch der Kakteenkunde 492, 1846

Opuntia estevesii

P.J. Braun, Cactus and Succulent Journal [U. S. ] 62 (4): 165, 1990

Opuntia exaltata

A. Berger, Hortus Mortolensis, 232, 410., 1912

Opuntia excelsa

H. Sánchez-Mejorada R., Cactus and Succulent Journal [U. S. ] 17 (3): 67, 1972

Opuntia expansa

D. Griffiths, Proceedings of the Biological Society of Washington 29: 14, 1916

Opuntia extensa

Salm-Dyck ex Pfeiffer, Enum. Diagn. Cact. 147.,

Opuntia exuviata

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 118, 1828

Opuntia exuviata v. angustior

DC., Mem. Mus. Hist. Nat. nat. 17: 118. Revue fam. Cact. 118. 1829, 1828

Opuntia exuviata v. spinosior

DC., Mem. Mus. Hist. Nat. nat. 17: 118. Revue fam. Cact. 118. 1829, 1828

Opuntia exuviata v. stellata

Lemaire, Cact. Gen. Sp. Nov. 67., 1839

Opuntia exuviata v. viridior

Salm-Dyck, Cact. Hort. Dyck. 48. 1845, 1844

Opuntia exuviato-stellata

Lemaire ex Labour., Cact. 492,

Opuntia falcata

Ekman & Werdermann, Repertorium Specierum Novarum Regni Vegetabilis 29: 228, 1931

Opuntia feracantha

Britton & Rose, Contributions from the U. S. National Herbarium 23: 1676, 1926

Opuntia feroacantha

Rose ex J.G. Ortega, Fl. Indig. Sinaloa, 1929

Opuntia ferocior

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 5, 1958

Opuntia ferox

Haworth, Suppl. Pl. Succ. 82.,

Opuntia ferruginispina

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 267-268, 1908

Opuntia festiva

Sencke ex Haage, Verz. Cact. 29 (Quid ?).

Opuntia ficus indica

Haworth 

Opuntia ficus-barbarica

A. Berger, Monatsschrift fur Kakteenkunde 22: 181, 1912

Opuntia ficus-indica

(L.) Mill., The Gardeners Dictionary: eighth edition Opuntia n. 2, 1768

Opuntia ficus-indica f. decumana

(Haworth) Spegazzini, Anales del Museo Nacional de Buenos Aires 4: 512, 1905

Opuntia ficus-indica f. gymnocarpa

(F.A.C. Weber) Spegazzini, Anales del Museo Nacional de Buenos Aires 3 (4): 512, 1905

Opuntia ficus-indica f. reticulata

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia ficus-indica v. amyclaea

(Ten.) A. Berger, Handb. Kakteenkult. [Schelle] 51., 1912

Opuntia ficus-indica v. decumana

 

Opuntia ficus-indica v. elongata

Schelle, Handb. Kakteenkult. [Schelle] 51., 1907

Opuntia ficus-indica v. gymnocarpa

 

Opuntia ficus-indica v. saboten

Makino, Journal of Japanese Botany 7 (4): 6, f. 1, 1931

Opuntia ficus-indicaXsoederstromiana

 

Opuntia filipendula

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 294, 1856

Opuntia flavescens

Peebles, Cactus and Succulent Journal [U. S. ] 29: 67, 1937

Opuntia flavicans

Lemaire, Cactearum Genera Nova Speciesque Novae 61, 1839

Opuntia flavispina

Hort. Berol. ex Foerst., Handb. Cact. ed. I. 508, nomen.,

Opuntia flexibilis

Hort. ex Pfeiffer, Enum. Diagu. Cact. 161,

Opuntia flexospina

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 87, 1916

Opuntia flexuosa

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13: 5, 1958

Opuntia floccosa

Salm-Dyck, Allgemeine Gartenzeitung 13: 388, 1845

Opuntia floccosa subvar. aurescens

 

Opuntia floccosa v. canispina

(Rauh & Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia floccosa v. cardenasii

(Marn.-Lap.) Rowlev, Rep. Pl. Succ., 22 (Regnum Veg., 87): 11, 1973

Opuntia floccosa v. crassior

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia floccosa v. denudata

F. A. C. Weber in Bois, Dict. Hort. 2: 897., 1898

Opuntia floccosa v. floccosa

 

Opuntia floccosa v. ovoides

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia floribunda

Lemaire, Cact. Gen. Sp. Nov. 68,

Opuntia foliosa

Salm-Dyck, Prodromus Systematis Naturalis Regni Vegetabilis 3: 471, 1828

Opuntia formidabilis

F.A. Walton, Cact. Journ. 1. 105., 1898

Opuntia fosbergii hyb.

C. B. Wolf (pro sp.), Occasional Papers [Rancho Santa Ana Botanic Garden] 1: 79, 1938

Opuntia fragilis

(Nutt.) Haworth, Synopsis plantarum succulentarum . 182, 1819

Opuntia fragilis f. brachyarthra

 

Opuntia fragilis ssp. brachyarthra

(Engelmann & J. M. Bigelow) W.A. Weber, Phytologia 51 (6): 374, 1982

Opuntia fragilis v. brachyarthra

 

Opuntia fragilis v. caespitosa

L.H. Bailey, The Standard Cyclopedia of Horticulture 4: 2363, 1916

Opuntia fragilis v. denudata

Wiegand & Backeberg, Descriptiones Cactacearum Novarum 10, 1956

Opuntia fragilis v. fragilis

 

Opuntia fragilis v. frutescens

Engelmann, Boston Journal of Natural History 5: 245, 1845

Opuntia fragilis v. parviconspicua

Backeberg, Descriptiones Cactacearum Novarum 10, 1956

Opuntia fragilis v. tuberiformis

L.H. Bailey, The Standard Cyclopedia of Horticulture 4: 2363, 1916

Opuntia frigida

(F. Ritter) G. Navarro, Lazaroa 17: 66, 1996

Opuntia frustulenta

Gibbes, Proceedings of the Elliott Society of Natural History 1: 273, 1859

Opuntia frutescens

Engelmann, Boston Journal of Natural History 6: 208, 1850

Opuntia frutescens v. brevispina

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 309, 1857

Opuntia frutescens v. longispina

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 309, 1857

Opuntia fulgens

Engelmann, Bot. Calif. 1. 250,

Opuntia fulgida

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 306, 1857

Opuntia fulgida v. fulgida

 

Opuntia fulgida v. hoffmannii

(Fosberg) L.D. Benson, Cact. Calif. 106, 1969

Opuntia fulgida v. mamillata

(Schott ex Engelmann) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 449, 1896

Opuntia fuliginosa

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 262-263, t. 25, 1908

Opuntia fulvicoma

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia fulvicoma v. bicolor

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia fulvispina

Salm-Dyck, Enumeratio Diagnostica Cactearum 164, 1837

Opuntia fulvispina v. badia

Salm-Dyck, Cact. Hort. Dyck. 65, 234. 1850, 1849

Opuntia fulvispina v. laevior

Salm-Dyck, Enumeratio Diagnostica Cactearum 164, 1837

Opuntia furiosa

Wendland & Pfeiffer, Enumeratio Diagnostica Cactearum 170, 1837

Opuntia fuscoatra

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 297, 1857

Opuntia fusicaulis

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 271, t. 23, upper left fig., 1908

Opuntia fusiformis

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 297, 1856 [1857]

Opuntia galapageia

Hemsl., Magazine of Zoology and Botany 1: 467, 1837

Opuntia galapageia subvar. barringtonensis

Opuntia galapageia subvar. inermis

 

Opuntia galapageia subvar. orientalis

 

Opuntia galapageia subvar. prolifera

 

Opuntia galapageia v. brossettii

Backeberg, Kakteenlexikon 317., 1966

Opuntia galapageia v. echios

(J. T. Howell) Backeberg, Die Cactaceae 1: 561, 1958

Opuntia galapageia v. galapageia

 

Opuntia galapageia v. gigantea

(J. T. Howell) Backeberg, Die Cactaceae 1: 562, 1958

Opuntia galapageia v. helleri

(K. Schumann ex Robins) Backeberg, Die Cactaceae 1: 562, 1958

Opuntia galapageia v. insularis

(Stewart) Backeberg, Die Cactaceae 1: 561, 1958

Opuntia galapageia v. macrocarpa

E.Y. Dawson, Cactus and Succulent Journal [U. S. ] 37: 141, 1965

Opuntia galapageia v. megasperma

 

Opuntia galapageia v. myriacantha

(F. A. C. Weber) Backeberg, Die Cactaceae 1: 561, 1958

Opuntia galapageia v. orientalis

 

Opuntia galapageia v. profusa

E.F. Anderson & Walk., Madrono; Journal of the California Botanical Society 20: 256, 1970

Opuntia galapageia v. saxicola

(J. T. Howell) Backeberg, Die Cactaceae 1: 562, 1958

Opuntia galapageia v. zacana

(J. T. Howell) Backeberg, Die Cactaceae 1: 562, 1958

Opuntia galeottii

De Smet ex Miq., Nederl. Kruidk. Arch. 4. 337., 1859

Opuntia galerasensis

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia ganderi

(C.B. Wolf) J. Rebman & D.J. Pinkava, Haseltonia 4: 103, 1996

Opuntia geissei

R. Philippi, Anal. Univ. Chil. 85. 492., 1894

Opuntia geometrica

A. Castellanos, Kakteenk., 172., 1934

Opuntia gilliesii

Hort. Berol. ex Pfeiffer, Enum. Diagn. Cact. 102,

Opuntia gilvescens

D. Griffiths, Annual Report of the Missouri Botanical Garden 87-88, t. 7, t. 2, f. 5, t. 13, f. 6, 1909

Opuntia gilvoalba

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 35, t. 9, 16, 17, 1912

Opuntia glaberrima

Hort. Berol. ex Pfeiffer, Enum. Diagn. Cact. 158,

Opuntia glauca

Forbes, Hort. Tour Germ. 158, 1837

Opuntia glaucescens

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 362, 1834

Opuntia glaucophylla

Wendl., Cat. Hort. Herrnh.; ex Pfeiff. Diagn. Cact. 162-, 1835

Opuntia glaucophylla v. laevior

Salm-Dyck, Cact. Hort. Dyck. 66. 1850, 1849

Opuntia glomerata

Haworth, Philosophical magazine, or annals of chemistry, 7: 111, 1830

Opuntia glomerata f. oligacantha

 

Opuntia glomerata f. papyracantha

(R. Philippi) Castell., Lilloa 23: 12., 1950

Opuntia glomerata v. calva

(Lemaire) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia glomerata v. gracilior

(Salm-Dyck) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia glomerata v. inermis

(Spegazzini) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia glomerata v. oligacantha

(Spegazzini) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia glomerata v. polycantha

(Spegazzini) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia golziana

K. Schumann, Gesamtb. Kakt. 654. 1898, 1898

Opuntia gomei

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 167-168, t. 21, 22, lower fig., 1910

Opuntia gorda

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 134, 1913

Opuntia gosseliniana

F.A.C. Weber, Bulletin de la Societe Nationale d'Acclimatation de France 49: 83, 1902

Opuntia gosseliniana v. santarita

(Griffiths & Hare) L.D. Benson, Cact. Ariz. 65, 1950

Opuntia gracilicylindrica

(Wiegand & Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia gracilior

Lemaire, Cact. Gen. et Sp. Nov. 68.,

Opuntia gracilis

Pfeiffer, Enumeratio Diagnostica Cactearum 172, 1837

Opuntia gracilis v. subpatens

Salm-Dyck, Cact. Hort. Dyck. 73, 251. 1850, 1849

Opuntia grahamii

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 304, 1856

Opuntia grandiflora hyb.

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 295, 1856 [1857]

Opuntia grandis

Pfeiffer, Enumeratio Diagnostica Cactearum 155, 1837

Opuntia grata

G. Phil., Linnaea 30: 211, 1859-1860

Opuntia grata v. leonina

Schelle, Handb. Kakteenkult. [Schelle] 46., 1907

Opuntia greenei

Britton & Rose, Smithsonian Miscellaneous Collections 50: 523, 1908

Opuntia greenii

Engelmann ex Coulter, Contrib. U. S. Nat. Herb. 3. 431, in syn., 1896

Opuntia gregoriana

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 26, 1912

Opuntia griffithsiana

Mackensen, Bulletin of the Torrey Botanical Club 39: 291, 1912

Opuntia grosseana

 

Opuntia grosseiana

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 1904: 391, 1904

Opuntia guanicana

Gurke, Monatsschr. Kakt. xvlii. 180., 1908

Opuntia guatemalensis

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 218, f. 285, 1919

Opuntia guatinensis

D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia guerrana

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 266, 1908

Opuntia guilanchi

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 265-266, 1908

Opuntia gymnocarpa

F.A.C. Weber, Dictionaire d'Horticulture 893, 1898

Opuntia haematocarpa

A. Berger, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 36: 456, 1905

Opuntia haitiensis

Britton, Smithson. Misc. Coll. I. 513., 1908

Opuntia halophila

Spegazzini, Anales de Sociedad Cientifica Argentina 99: 97, 1925

Opuntia hamiltonii

(H. E. Gates ex Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 25, 1958

Opuntia hanburyana

A. Weber ex A. Berger, Gard. Chron., I. 34., 1904

Opuntia hattoniana

Britton & Rose, Johnston & Tryon, Rep. Prickly Pear Comm. 97., 1914

Opuntia heacockae

Arp, Sida 10: 207-210, 1984

Opuntia heacockiae

G.K. Arp, Sida, 10 (3): 207, as 'heacockae', 1984

Opuntia heliabravoana

Scheinvar, Anales del Instituto de Biologia de la Universidad Nacional Autonoma de Mexico 45: 75, 1974

Opuntia heliae

Matuda, Cactaceas y suculentas mexicanas 1 (2): 23-24, f. 14, 1955

Opuntia helleri

K. Schumann ex B.L. Rob., Proceedings of the American Academy of Arts and Sciences 38: 180, 1902

Opuntia hempeliana

K. Schumann, Gesamtbeschreibung der Kakteen 1: 690, [1898]1899

Opuntia hernandezii

De Candolle, Mem. Hist. Nat. Paris 17: 69, t. 16, 1828

Opuntia hernandezii v. typica

Rol.-Goss., Bulletin du Museum National d'Histoire Naturelle 15: 507, 1909

Opuntia herrfeldtii

Kupper, Monatsschrift fur Kakteenkunde: 212, 1930

Opuntia heteromorpha

R. Philippi, Anales del Museo Nacional. Santiago de Chile 1891: 28, 1891

Opuntia hickenii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 93, f. 108, 1919

Opuntia hieronymi

Grisebach, Goett. Abh. 24. 140., 1879

Opuntia hildemannii

Fric, Mollers Deutsch. GartnerZeit., 42. 377., 1927

Opuntia hirschii

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia hispanica

Griffiths, Bull. Torrey Bot. Club 46: 198. 1919,

Opuntia hitchcockii

J.G. Ortega, Bol. Pro-Cult. Reg. 1: 13, 1930

Opuntia hitchenii

Forbes, Hort. Tour Germ. 159, nomen.,

Opuntia hoffmannii

H. Bravo Hollis, Anales del Instituto de Biologia de la Universidad Nacional Autonoma de Mexico, Serie Biologia 1: 89, 1930

Opuntia hondurensis

Standley, Field Museum of Natural History, Botanical Series 9 (4): 316, f. 8, 1940

Opuntia horizontalis

Hort. ex Pfeiffer, Enum. Diagn. Cact. 159,

Opuntia horrida

Salm-Dyck, Prodromus Systematis Naturalis Regni Vegetabilis 3: 472, 1828

Opuntia horstii

Heinrich, Backeb. Descr. Cact. Nov. 3. 10., 1963

Opuntia hossei

(Krainz & Graser) Rowley, Nat. Cact. & Succ. Journ. 13. 5, 1958

Opuntia howeyi

J.A. Purpus, Mitteilungen der Deutschen Denrologischen Gesellschaft 1925: 61, 1925

Opuntia huajuapensis

H. Bravo Hollis, Anales del Instituto de Biologia de la Universidad Nacional de Mexico 25: 484, 1954

Opuntia hualpaensis

Hester, Cact. Succ. J. (Los Angeles) 15: 191, fig. 94. 1943,

Opuntia humahuacana

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 4, 1958

Opuntia humifusa

(Raf.) Raf., Medical Flora 2: 247, 1830

Opuntia humifusa ssp. minor

(Engelmann) R. Crook & R. Mottram, Bradleya, 16: 135: 1998

Opuntia humifusa v. ammophila

(Small) L.D. Benson, Cactus and Succulent Journal [U. S. ] 48: 59, 1976

Opuntia humifusa v. austrina

(Small) Dress, Baileya 19: 165, 1975

Opuntia humifusa v. humifusa

(Raf.) Raf. 

Opuntia humifusa v. microsperma

(Engelm.) A. Heller, Catalogue of North American Plants North of Mexico (ed. 2) 8, 1900

Opuntia humifusa v. parva

A. Heller, Catalogue of North American Plants North of Mexico (ed. 2) 8, 1900

Opuntia humifusa v. roseiflora

 

Opuntia humifusa v. vaseyi

A. Heller, Cat. N. Amer. Pl. (ed. 2) 8., 1900

Opuntia humilis

Haworth, Synopsis plantarum succulentarum . 189, 1812

Opuntia humistrata

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 381, 1916

Opuntia hypogaea

Werdermann in Backeberg, Neue Kakteen 64, 1931

Opuntia hypsophila

Spegazzini, Anal. Mus. Buenos Aires, 11. 509.,

Opuntia hyptiacantha

F.A.C. Weber, Dictionaire d'Horticulture 894, 1898

Opuntia hystricina

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 299, 1856

Opuntia hystricina v. bensonii

Backeberg, Cactaceae (Backeberg) 1: 609., 1958

Opuntia hystricina v. erinacea

 

Opuntia hystricina v. hystricina

 

Opuntia hystricina v. nicholii

(L. D. Benson) Backeberg, Cactaceae (Backeberg) 1: 610., 1958

Opuntia hystricina v. ursina

(F.A.C. Weber) Backeberg, Die Cactaceae 1: 610, 1958

Opuntia hystrix

Grisebach, Cact. Pl. Cub. 117, 1866

Opuntia ianthinantha

(F. Ritter) Iliff, Cactaceae Consensus Initiatives 2: 8, 1997

Opuntia icterica

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 138, 1913

Opuntia ignescens

D. Vaupel, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 50 (2-3, Beibl. 111): 30, 1913

Opuntia ignescens v. steiniana

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 5., 1958

Opuntia ignota

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 99, f. 121, 1919

Opuntia imbricaria

 

Opuntia imbricata

(Haworth) DC., Prodromus Systematis Naturalis Regni Vegetabilis 3: 471, 1828

Opuntia imbricata v. argentea

M. S. Anthony, American Midland Naturalist 55 (1): 225, 1956

Opuntia imbricata v. cardenche

(Griffiths) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia imbricata v. imbricata

 

Opuntia imbricata v. lloydii

(Rose) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia imbricata v. ramosior

Salm-Dyck, Cact. Hort. Dyck. 249. 1850, 1849

Opuntia imbricata v. tenuior

Salm-Dyck, Cact. Hort. Dyck. 249. 1850, 1849

Opuntia imbricata v. vexans

 

Opuntia impedata

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 257-258, f. 235, 1923

Opuntia inaequilateralis

A. Berger, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 36: 453, 1905

Opuntia inaequilateralis v. angustior

(F. Ritter) R. Crook & R. Mottram, Bradleya, 17: 113: 1999

Opuntia inamoena

K. Schumann, Flora Brasiliensis 4 (2): 306, 1890

Opuntia inamoena f. spinigera

(F. Ritter) P.J. Braun & E. Esteves Pereira, Cact. Succ. J. (U. S. A.), 61 (6): 272: 1989

Opuntia inamoena v. flaviflora

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia inaperta

(Schott ex Griffiths) D.R. Hunt, Cactaceae Consensus Initiatives 4: 5, 1997

Opuntia incarnadilla

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 27, 1912

Opuntia inermis

(DC.) DC., Prodromus Systematis Naturalis Regni Vegetabilis 3: 437, 1828

Opuntia infesta

(F. Ritter) Iliff, Cactaceae Consensus Initiatives 2: 8, 1997

Opuntia insularis

Stewart, Proceedings of the California Academy of Sciences, Series 4, 1: 113, 1911

Opuntia intermedia

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 364, 1834

Opuntia intermedia v. prostrata

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 69 (1849), 1850

Opuntia intricata

D. Griffiths, Proceedings of the Biological Society of Washington 29: 10, 1916

Opuntia invicta

T. S. Brandeg., Proceedings of the California Academy of Sciences, Series 2, 2: 163, 1889

Opuntia involuta

Otto ex Foerst., Handb. Cact. ed. I. 505,

Opuntia ipatiana

Cárdenas, Cactus, No. 34, 127; cf. Cact. & Succ. Journ. Amer. 26. 84 (1954). 1952

Opuntia irrorata

Mart. ex Pfeiffer, Enum. Diagn. Cact. 154,

Opuntia italiana cv.

 

Opuntia italica

Tenore ex Pfeiffer, Enum. Diagn. Cact. 149,

Opuntia ithypetala

Griffiths, Bull. Torr. Bot. Cl., 43. 529., 1916

Opuntia jaliscana

H. Bravo Hollis, Cactaceas y suculentas mexicanas 17: 115, 1972

Opuntia jamaicensis

Britton & Harris, Torreya 11: 130, 1911

Opuntia joconostle

F.A.C. Weber, Cact. Util. Mexico 120, 1928

Opuntia juniperina

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 197, f. 243-244, 1919

Opuntia jussieuii

Haage ex Foerst., Handb. Cact. ed. I. 508, nomen.,

Opuntia karwinskiana

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 239, 1849[1850]

Opuntia kelvinensis hyb.

V.E. Grant & K.A. Grant, Evolution, 25 (1): 155., 1971

Opuntia keyensis

Britton & Small, Journal of the New York Botanical Garden 20: 31, 1919

Opuntia kiska-loro

Spegazzini, Anal. Mus. Buenos Aires, 11. 516., 1905

Opuntia kleiniae

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 118, 1828

Opuntia kleiniae v. gilensis

Fisch., Tax. Rel. 41, 1962

Opuntia kleiniae v. kleiniae

 

Opuntia kleiniae v. laetevirens

Salm-Dyck, Cact. Hort. Dyck. 73, 250. 1850, 1849

Opuntia kleiniae v. tetracantha

(Toumey) W. T. Marshall, Des. Bot. Gard. Ariz. Sci. Bull. 1: 17, 1950

Opuntia kuehnrichiana

Werdermann & Backeberg, Neue Kakteen 64, 1931

Opuntia kuehnrichiana v. applanata

Werdermann & Backeberg, Neue Kakteen 64, 1931

Opuntia kuehnrichiana v. kuehnrichiana

 

Opuntia kuehnrichii

Backeberg, Cact. & Succ. Journ. Amer. 3. 132, in obs., 1932

Opuntia kunzei

Rose, Smithsonian Miscellaneous Collections 50: 505, 1908

Opuntia kunzei v. wrightiana

(E. M. Baxter) Peebles, Leaflets of Western Botany 5 (12): 192, 1949

Opuntia labouretiana

Console, Gesamtbeschreibung der Kakteen 717, 1898

Opuntia laetevirens

Backeberg, Cactus, Paris, No. 75, 32; Backeb. Cactac. Handb. Kakteenk. 6. 3617 (1962), 1962

Opuntia laevis

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 419, 1896

Opuntia laevis v. canada

(Griffiths) Peebles, Cact. Succ. J. (Los Angeles) 9: 68., 1937

Opuntia lagopus

K. Schumann, Gesamtbeschreibung der Kakteen 151, 1903

Opuntia lagopus subvar. brachycarpa

 

Opuntia lagopus v. aurea

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia lagopus v. aureo-penicillata

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia lagopus v. leucolagopus

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 6, 1958

Opuntia lagopus v. pachyclada

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1); 5, 1958

Opuntia lagunae

Baxter ex H. Bravo Hollis, Anales del Instituto de Biologia de la Universidad Nacional de Mexico 3: 181, 1932

Opuntia laiglonii

Fric., Ceskoslov. Zahradnickych Listu [Kakt. Sukk. ], 1924, 122, nomen; cf. Gray Herb. Card Cat., Issue 114., 1924

Opuntia lanceolata

Haworth, Syn. Pl. Succ. 192.,

Opuntia lanigera

Parment., Cacteae in Horto Dyckensi Cultae [ed. 1849] 65, 1849[1850]

Opuntia larreyi

F.A.C. Weber, Contributions from the U. S. National Herbarium 3: 423, 1897

Opuntia lasiacantha

Pfeiffer, Enumeratio Diagnostica Cactearum 160, 1837

Opuntia lata

Small, Journal of the New York Botanical Garden 20: 26, 1919

Opuntia laxiflora

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 85, 1916

Opuntia ledienii

Hort. ex A. Berger, Hort. Mortol. 233, 1912

Opuntia lemaireana

Console ex Bois, Dict. Hort. 894., 1898

Opuntia leoncito

Werdermann, Notizblatt des Botanischen Gartens und Museums zu Berlin-Dahlem 10 (97): 752, 1929

Opuntia leonina

Haage & Schmidt 

Opuntia leptarthra

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 10: 393, 1904

Opuntia leptocarpa

Mackensen, Bulletin of the Torrey Botanical Club 38: 141, 1911

Opuntia leptocaulis

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 118, 1828

Opuntia leptocaulis f. brevispina

(Engelmann) S. Watson, Bibliographical Index to North American Botany 1: 407, 1878

Opuntia leptocaulis f. longispina

(Engelmann) A. Berger, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 36: 459, 1905

Opuntia leptocaulis f. vaginata

(Engelmann) S. Watson, Bibliographical Index to North American Botany 1: 407, 1878

Opuntia leptocaulis v. badia

A. Berger, Kakteen 59, 1929

Opuntia leptocaulis v. brevispina

 

Opuntia leptocaulis v. brittoni

(Gonzalez Ortega) H. Bravo Hollis, Cact. Suc. Mex. 17: 119., 1972

Opuntia leptocaulis v. brittonii

(J.G. Ortega) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia leptocaulis v. leptocaulis

 

Opuntia leptocaulis v. pleuriseta

A. Berger, Kakteen 59, 1929

Opuntia leptocaulis v. pluriseta

A. Berger, Kakteen (Berger) 59., 1929

Opuntia leptocaulis v. robustior

A. Berger, Kakteen 59, 1929

Opuntia leptocaulis v. stipitata

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 456, 1896

Opuntia leucacantha

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 362, 1834

Opuntia leucacantha v. laevior

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1844] 47, 1844[1845]

Opuntia leucacantha v. subferox

Salm-Dyck, Handbuch der Kakteenkunde 497, 1846

Opuntia leucantha

Link & Otto, Verh. Ver. Befoerd. Gartenb. 6. 484, nomen; Pfeiff. Enum. Diagn. Cact. 167., 1830

Opuntia leucophaea

R. Philippi, Anales del Museo Nacional. Santiago de Chile 1891: 27, 1891

Opuntia leucostata

Forbes, Hort. Tour Germ. 160, nomen,

Opuntia leucosticta

Wendland, Enumeratio Diagnostica Cactearum 167, 1837

Opuntia leucotricha

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 119, 1828

Opuntia leucotricha v. fulvispina

F.A.C. Weber, Gesamtbeschreibung der Kakteen 157, 1903

Opuntia lilae

B. Trujillo & M. Ponce, Ernstia 58-60: 1, 1990

Opuntia limitata

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 133, 1995

Opuntia lindheimeri

Engelmann, Boston Journal of Natural History 6: 207, 1850

Opuntia lindheimeri v. aciculata

(Griffiths) H. Bravo Hollis, Cactaceas y suculentas mexicanas 19 (2): 47, 1974

Opuntia lindheimeri v. chisosensis

M. S. Anthony, American Midland Naturalist 55: 252, f. 26, 1956

Opuntia lindheimeri v. cuija

(Griffiths & Hare) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia lindheimeri v. cyclodes

(Engelmann & J. M. Bigelow) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 422, 1896

Opuntia lindheimeri v. dulcis

(Engelmann) J.M. Coulter, Contributions from the U. S. National Herbarium 3 (7): 421, 1896

Opuntia lindheimeri v. ellisiana

(Griff.) K. Hammer, Kulterpflanze, 24: 268, 1976

Opuntia lindheimeri v. lehmannii

L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia lindheimeri v. lindheimeri

 

Opuntia lindheimeri v. linguiformis

(Griffiths) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia lindheimeri v. littoralis

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 422, 1897

Opuntia lindheimeri v. lucens

(Griffiths) L. Scheinvar, Phytologia, 49 (4): 320: 1981

Opuntia lindheimeri v. occidentalis

J. M. Coulter, Contr. U. S. Natl. Herb. 3: 421., 1896

Opuntia lindheimeri v. subarmata

(Griffiths) J. Elizondo E. & Wehbe, Cact. Suc. Mex. 32: 17., 1987

Opuntia lindheimeri v. tricolor

(Griffiths) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia lindsayi

J.P. Rebman, Cactus and Succulent Journal [U. S. ] 69 (2): 67, 1997

Opuntia linguiformis

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 270-271, t. 27, lower fig., 1908

Opuntia littoralis

(Engelmann) Britton & Rose, Smithsonian Miscellaneous Collections 50: 529, 1908

Opuntia littoralis v. austrocalifornica

L.D. Benson & Walk., Ann. Missouri Bot. Gard. 52: 269., 1965

Opuntia littoralis v. littoralis

 

Opuntia littoralis v. martiniana

(L.D. Benson) L.D. Benson, Annals of the Missouri Botanical Garden 52: 270, 1965

Opuntia littoralis v. piercei

(Fosberg) L.D. Benson & Walk., Ann. Missouri Bot. Gard. 52: 270., 1965

Opuntia littoralis v. vaseyi

(Coulter) L.D. Benson & Walk., Ann. Missouri Bot. Gard. 52: 268., 1965

Opuntia llanos-de-huanta

D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia lloydii

Rose, Contributions from the U. S. National Herbarium 12 (7): 292, t. 25, f. 34, 1909

Opuntia longiareolata

Clover & Jotter, Bulletin of the Torrey Botanical Club 68: 418, f. 6, 1941

Opuntia longiarticulata

 

Opuntia longiclada

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 525, 1916

Opuntia longiglochia

C. Z. Nelson, Trans. Illinois State Acad. Sci. 12: 120. Galesburg Rep. Reg. July 20, 1915, 1919

Opuntia longispina

Haworth, Philosophical magazine, or annals of chemistry, ?: 109, 1830

Opuntia longispina v. agglomerata

Backeberg, Cactaceae (Backeberg) 6: 3609., 1962

Opuntia longispina v. brevispina

Backeberg, Cactus (Paris) no. 38: 250., 1953

Opuntia longispina v. corrugata

(Salm-Dyck) Backeberg, Cactus (Paris) no. 38: 250., 1953

Opuntia longispina v. flavidispina

Backeberg, Cactus (Paris) no. 38: 250., 1953

Opuntia longispina v. intermedia

Backeberg, Cactus (Paris) no. 38: 250., 1953

Opuntia loomisii

Peebles, Cactus and Succulent Journal [U. S. ] 9: 109, 1938

Opuntia lubrica

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 169, t. 23, 1910

Opuntia lubrica v. aurea

(E. M. Baxter) Backeberg, Cactaceae (Backeberg) 1: 585., 1958

Opuntia lucayana hyb.

Britton (pro sp.), Bulletin of the New York Botanical Garden 4: 141, 1906

Opuntia lucens

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 269-270, 1908

Opuntia lucida

Hort., ex Wien. Ill. Gart. -Zeit. 14. 146, 1889

Opuntia luija

Hort. ex Borg, Cacti, 88, in syn., 1937

Opuntia lutea

(Rose) J.C. Solomon, Novon 9 (3): 422, 1999

Opuntia macateei

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 221, f. 292-293, 1919

Opuntia macbridei

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 261, f. 238, 1923

Opuntia macbridei v. orbicularis

Rauh & Backeberg, Descriptiones Cactacearum Novarum 1956: 10, 1957

Opuntia macdougaliana

Rose, Smithsonian Miscellaneous Collections 50: 516, 1908

Opuntia mackensenii

Rose, Contributions from the U. S. National Herbarium 13 (9): 310, t. 67, 1911

Opuntia macracantha

Gibbes, Proceedings of the Elliott Society of Natural History 1: 273, 1859

Opuntia macrantha

Gibbes, Proc. Elliott Soc. Nat. Hist. 1. 273., 1858

Opuntia macrarthra

 

Opuntia macrocalyx

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 268-269, t. 28, upper fig., 1908

Opuntia macrocentra

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 292, 1856 [1857]

Opuntia macrocentra v. aureispina

S. Brack & K.D. Heil, Cactus and Succulent Journal [U. S. ] 60: 17, 1988

Opuntia macrocentra v. castetteri

 

Opuntia macrocentra v. martiniana

L.D. Benson, Cact. Ariz. ed. 2 64, 1950

Opuntia macrocentra v. minor

M. S. Anthony, American Midland Naturalist 55: 244, f. 21, 1956

Opuntia macrorhiza

Engelmann, Boston Journal of Natural History 6: 206, 1850

Opuntia macrorhiza v. auricarpa

 

Opuntia macrorhiza v. macrorhiza

 

Opuntia macrorhiza v. potosina

R.E.M. Hernández Valencia, Acta Cient. Potosina, 10 (2): 155, 1988

Opuntia macrorhiza v. pottsii

(Salm-Dyck) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia macrorhiza v. riograndense

 

Opuntia macrorhiza v. sphaerocarpa

 

Opuntia maculacantha

C. F. Forster, Hamb. Gartenz. 17. 166., 1861

Opuntia maelenii

Hort. Belg. ex Salm-Dyck, Cact. Hort. Dyck. ed. I. 46,

Opuntia magenta

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 268, 1908

Opuntia magna

D. Griffiths, Proceedings of the Biological Society of Washington 27: 23, 1914

Opuntia magnarenensis

D. Griffiths, Proceedings of the Biological Society of Washington 29 (3): 9-10, 1916

Opuntia magnifica

Small, Manual of the Southeastern Flora 906, 1933

Opuntia magnifolia

Noronha, Verhandelingen van het bataviaasch genootschap van kunsten en wetenschappen 5 (4): 22, 1790

Opuntia maideni

Griffiths, Bull. Torr. Bot. Cl., 46. 201., 1919

Opuntia maihuen

Remy, Flora Chilena 3: 29, 1847

Opuntia maldonadensis hyb.

Arechavaleta, Anal. Mus. Montevid. 5. 286.,

Opuntia malyana

(W. Rausch) W. Rauh, Kakteen an ihren Standorten: 93, without basionym ref., 1979

Opuntia mamillata

Schott ex Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 308, 1856 [1857]

Opuntia mammillata

Engelmann, Syn. Cact. U. S. 52., 1856

Opuntia mandragora

(Backeberg) G.D. Rowley, Nat. Cact. & Succ. Journ. 13. 6, 1958

Opuntia marenae

W.E. Parsons, Desert Plant Life 8: 10, 1936

Opuntia margaritana

(J.M. Coulter) Baxter, Cactus and Succulent Journal [U. S. ] 2: 388, 1931

Opuntia maritima

Rafin., Atlantic Journal 146, 1832

Opuntia marnieriana

Backeberg, Cactus (Paris) 8 (36): 181, 1953

Opuntia martiniana

(L.D. Benson) B.D. Parfitt, Systematic Botany 5 (4): 416, 1980 [1981]

Opuntia matudae

L. Scheinvar, Phytologia, 49 (4): 324, 1981

Opuntia maxima

Miller, The Gardeners Dictionary: eighth edition Opuntia no. 5, 1768

Opuntia maxonii

J.G. Ortega, Fl. Ind. Sinaloa, 1929

Opuntia media

Haworth, Suppl. Pl. Succ. 82,

Opuntia megacantha

Salm-Dyck, Hort. Dyck. 363., 1834

Opuntia megacantha f. lasiacantha

 

Opuntia megacantha v. lasiacantha

(Pfeiffer) Berger, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 36: 453, 1905

Opuntia megacantha v. tenuispina

Salm-Dyck, Cact. Hort. Dyck. 68. 1850, 1849

Opuntia megacarpa

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 91, t. 2, f. 3, t. 13, f. 10, 1909

Opuntia megalantha

Griffiths, Bull. Torr. Bot. Cl., 43. 530., 1916

Opuntia megalarthra

Rose, Smithson. Misc. Coll. l. 529., 1908

Opuntia megapotamica

Arechavaleta, Anales Museo Nacional Montevideo, ser. 2 1: 42, 1905

Opuntia megarhiza

Rose, Contributions from the U. S. National Herbarium 10: 126, 1906

Opuntia megasperma

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 46, 1933

Opuntia megasperma ssp. orientalis

 

Opuntia megasperma ssp. typica

J. T. Howell, Proc. Calif. Acad. Sci. 21: 47., 1933

Opuntia megasperma v. megasperma

 

Opuntia megasperma v. mesophytica

J. Lundh, Madrono; Journal of the California Botanical Society 20: 254, 1970

Opuntia megasperma v. orientalis

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 48, 1933

Opuntia melanocentra

VS 187 

Opuntia melanosperma

Svenson, American Journal of Botany 33: 471, 1946

Opuntia mesacantha

Rafin., Bulletin Botanique [Geneve] 216, 1830

Opuntia mesacantha v. cymochila

(Engelmann & J. M. Bigelow) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 430, 1896

Opuntia mesacantha v. grandiflora

(Engelmann) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 429, 1896

Opuntia mesacantha v. greenii

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3: 431, 1896

Opuntia mesacantha v. macrorhiza

(Engelmann) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 430, 1896

Opuntia mesacantha v. mesacantha

 

Opuntia mesacantha v. microsperma

(Engelmann & J. M. Bigelow) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 429, 1896

Opuntia mesacantha v. oplocarpa

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3 (7): 431, 1896

Opuntia mesacantha v. parva

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 429, 1896

Opuntia mesacantha v. sphaerocarpa

J.M. Coulter, Contributions from the U. S. National Herbarium 19: 446, 1915

Opuntia mesacantha v. stenochila

(Engelmann & J. M. Bigelow) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 430, 1896

Opuntia mesacantha v. vaseyi

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 431, 1896

Opuntia metternichii

Picol. ex Salm-Dyck, Cact. Hort. Dyck. ed. I. 46,

Opuntia metuenda

Pittier, Journ. Wash. Acad. Sc., 26. 41., 1936

Opuntia mexicana

Hort. ex Pfeiffer, Enum. Diagn. Cact. 150, 160,

Opuntia micrarthra

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 130, 1913

Opuntia microcarpa

K. Schumann, Gesamtbeschreibung der Kakteen 714, 1898

Opuntia microdasys

(Lehmann) Pfeiffer, Enumeratio Diagnostica Cactearum 154, 1837

Opuntia microdasys f. minor

Salm-Dyck, Bot. Gart. 186, 1834

Opuntia microdasys subvar. albiflora

 

Opuntia microdasys v. albata

 

Opuntia microdasys v. albiglochidiata

Backeberg, Descriptiones Cactacearum Novarum 10, 1956

Opuntia microdasys v. albispina

Fobe, Monatsschrift fur Kakteenkunde 235, 1931

Opuntia microdasys v. gracilior

Schelle, Kakteen 60, 1926

Opuntia microdasys v. laevior

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 241, 1849

Opuntia microdasys v. lutea

 

Opuntia microdasys v. microdasys

 

Opuntia microdasys v. minima

Salm-Dyck ex Schelle, Kakteen 60, 1926

Opuntia microdasys v. pallida

Borg, Cacti 83, 1951

Opuntia microdasys v. rufida

(Engelmann) K. Schumann, Gesamtbeschr. Kakt. 706., 1898

Opuntia microdisca

F.A.C. Weber, Dictionaire d'Horticulture 896, 1898

Opuntia microthele

Hort. ex Pfeiffer, Enum. Diagn. Cact. 173,

Opuntia mieckleyi

K. Schumann, Bluhende Kakteen 4: pl. 44, 1903

Opuntia militaris

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 104, f. 127, 1919

Opuntia millspaughii

Britton, Smithsonian Miscellaneous Collections 50: 513, 1908

Opuntia mininuta

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 6, 1958

Opuntia minor

C. Muell., Walp. Ann. 5. 50, sphalm.,

Opuntia minuscula

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13: 6, 1958

Opuntia minuta

(Backeberg) A. Cast., Lilloa 23: 12, 1950

Opuntia miquelii

Monville, L'Horticulteur Universel 1: 218, 1839

Opuntia miquelii v. jilesii

G.D. Rowley, Natl. Cact. Succ. J. 13: 4., 1958

Opuntia mira

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia missouriensis

De Candolle, Prodromus Systematis Naturalis Regni Vegetabilis 3: 472, 1828

Opuntia missouriensis f. albispina

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856

Opuntia missouriensis f. trichophora

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856 [1857]

Opuntia missouriensis v. albispina

 

Opuntia missouriensis v. elongata

Salm-Dyck, Cact. Hort. Dyck. 46. 1845, 1844

Opuntia missouriensis v. erythrostema

Späth 

Opuntia missouriensis v. microsperma

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856 [1857]

Opuntia missouriensis v. platycarpa

Engelmann, Proc. Amer. Acad. Arts 3: 300., 1856

Opuntia missouriensis v. rufispina

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856

Opuntia missouriensis v. salmonea

Späth 

Opuntia missouriensis v. spirocentra

Hort 

Opuntia missouriensis v. subinermis

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856 [1857]

Opuntia missouriensis v. trichophora

 

Opuntia mistiensis

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia moelleri

A. Berger, Kakteen 57, 1929

Opuntia mojavensis

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 293, 1856 [1857]

Opuntia molesta

T. S. Brandeg., Proceedings of the California Academy of Sciences, Series 2, 2 (2): 164, 1889

Opuntia molfinoi

(Spegazzini) Werdermann, Feddes Repertorium 30, 59, 1932

Opuntia molinensis

Spegazzini, Anales de Sociedad Cientifica Argentina 96: 63, 1923

Opuntia monacantha

(Willd.) Haworth, Suppl. Pl. Succ. 81., 1819

Opuntia monacantha cv. Variegata

 

Opuntia monacantha ssp. brunneogemmia

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia monacantha v.

 

Opuntia monacantha v. deflexa

Salm-Dyck, Cact. Hort. Dyck. 66, 234. 1850, 1849

Opuntia monacantha v. gracilior

Salm-Dyck, Cact. Hort. Dyck. 66, 235. 1850, 1849

Opuntia moniliformis

(L.) Haworth ex Steud., Nomenclator Botanicus. Editio secunda 2: 221, 1841

Opuntia moniliformis f. guantanamana

(Areces) R. Govaerts, World Checklist Seed Plants, 3 (1): 21: 1999

Opuntia montana

Sencke, Haage, Verz. Cact. 29 (Quid ?).

Opuntia montevideensis

Spegazzini, Anal. Mus. Buenos Aires, 11. 515; et ex Arech. in Anal. Mus. Montevid. 5. 282., 1905

Opuntia monticola

R. Philippi, Linnaea, 33. (-65) 82., 1864

Opuntia morenoi

K. Schumann, Kuntze, Rev. Gen. 3. 2. 107, nomen.,

Opuntia mortolensis

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 47, t. 6, f. 1, 1919

Opuntia muelleriana

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 6, 1958

Opuntia multiareolata

Backeberg, Cactus, Paris, No. 75, 32; Backeb. Cactac. Handb. Kakteenk. 6. 3614 (1962). 1962

Opuntia multigeniculata

Clokey, Madrono; Journal of the California Botanical Society 7: 69-70, pl. 4, f. a, 1943

Opuntia munzii

C.B. Wolf, Occasional Papers [Rancho Santa Ana Botanic Garden] 1: 79, 1938

Opuntia myriacantha

F.A.C. Weber, Dictionaire d'Horticulture 894, 1898

Opuntia nana

Vis., Flora Dalmatica 3: 143, 1852

Opuntia nashii

Britton, Bulletin of the New York Botanical Garden 3: 446, 1905

Opuntia nashii ssp. gibarensis

(Areces) R. Govaerts, World Checklist Seed Plants, 3 (1): 21: 1999

Opuntia nejapensis

H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 115, 1972

Opuntia nelsonii

Rose, Smithsonian Miscellaneous Collections 50: 516, 1908

Opuntia nemoralis

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 133, 1913

Opuntia neoarbuscula

D. Griffiths, Annual Report of the Missouri Botanical Garden 19: 260-261, t. 23, upper fig., 1908

Opuntia neoargentina

(Backeberg) G.D. Rowley, Nat. Cact. & Succ. Journ. 13. 4, 1958

Opuntia neochrysacantha

H. Bravo Hollis, Cactaceas y suculentas mexicanas 19 (1): 20, 1974

Opuntia neorutila

Y. Ito, The Cactaceae: 85, nom. nov., without full repl. syn. ref.: 1981

Opuntia neuquensis

Borg, Cacti, 67., 1937

Opuntia nicholii

L.D. Benson, Cacti Arizona, ed. 2, 48; cf. Gray Herb. Card Cat., 1950

Opuntia nigricans

(Haworth) Haworth, Handb. Caot. ed. I. 496,

Opuntia nigrispina

K. Schumann, Gesamtbeschreibung der Kakteen 1: 695, 1898 [1899]

Opuntia nigrita

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 169-170, t. 24, 1910

Opuntia nitens

Small, Manual of the Southeastern Flora 906, 1933

Opuntia noodtiae

(Backeberg & H. Jacobsen) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia nopalilla

Karwinski ex Salm-Dyck, Cact. Hort. Dyck. ed. 2. 68,

Opuntia nuda

(Backeberg) G.D. Rowley, Repertorium Plantarum Succulentarum 22: 11, 1973

Opuntia obliqua

Backeberg, Cactus, Paris, No. 75, 32; Backeb. Cactac. Handb. Kakteenk. 6. 3614 (1962), 1962

Opuntia oblongata

Wendland, Enumeratio Diagnostica Cactearum 161, 1837

Opuntia obovata

Griffiths, Bull. Torr. Bot. Cl., 46. 202., 1919

Opuntia occidentalis hyb.

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 291, 1856

Opuntia occidentalis v. covillei

(Britton & Rose) Parish, Man. Fl. Pl. Calif. 657., 1925

Opuntia occidentalis v. littoralis

(Engelmann) Parish, A Manual of the Flowering Plants of California . 657, 1925

Opuntia occidentalis v. megacarpa

(Griffiths) Munz, Aliso 4 (1): 94, 1958

Opuntia occidentalis v. occidentalis

 

Opuntia occidentalis v. piercei

(Fosberg) Munz, Aliso 4 (1): 94, 1958

Opuntia occidentalis v. vaseyi

(J.M. Coulter) Munz, Aliso 4 (1): 94, 1958

Opuntia ochrocentra

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 262-263, 1923

Opuntia ochrocentra v. inermis

DC. in DC., Pl. Hist. Succ. 2: 138, fig., 1804

Opuntia oligacantha

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 241, 1849[1850]

Opuntia oplocarpa

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3: 431, 1896

Opuntia opuntia

(L.) Karst., Deutsche Flora. Pharmaceutisch-medicinische Botanik. 888, 1882

Opuntia orbiculata

Salm-Dyck ex Pfeiffer, Enumeratio Diagnostica Cactearum 156: 1837

Opuntia oricola

Philbrick, Cact. & Succ. Journ. Amer. 36. 163., 1964

Opuntia orurensis

Cárdenas, Cactus and Succulent Journal [U. S. ] 28: 112, f. 75-76, 1956

Opuntia ottonis

Salm-Dyck, Cact. Hort. Dyck. ed. I. 48, nomen.,

Opuntia ovallei

C. Gay, Flora Chilena 3: 29, 1847

Opuntia ovata

Pfeiffer, Enumeratio Diagnostica Cactearum 144, 1837

Opuntia ovoides

Lemaire, Cact. Gen. Sp. Nov. 73,

Opuntia pachona

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 168-169, t. 22, upper fig., 1910

Opuntia pachypus

K. Schumann, Monatsschrift fur Kakteenkunde 14: 26, 1904

Opuntia paediophila

A. Castellanos, Lilloa 23: 7, f. 2, 1950

Opuntia pailana

Weing., Monatsschrift der Deutschen Kakteen-Gesellschaft, E. V., Sitz Berlin 9: 167, 1929

Opuntia pallida

Rose, Smithsonian Miscellaneous Collections 50: 507, 1908

Opuntia palmadora

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 202, f. 250-251, 1919

Opuntia palmadora ssp. catingicola

(Werdermann) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia palmeri

Engelmann ex Coulter, U. S. Dept. Agric. Contrib. Nat. Herb. 3. 423.,

Opuntia pampeana

Spegazzini, Contr. Fl. Ventana, 30., 1896

Opuntia panellana

(Backeberg) Backeberg, Cactac. Handb. Kakteenk. 6. 3619, 1962

Opuntia papyracantha

Hort. ex K. Schumann, Gesamtb. Kakt. 1. 694,

Opuntia paraguayensis

K. Schumann, Monatsschrift fur Kakteenkunde 149, 1899

Opuntia parishii

Orcutt, West American Scientist 10: 81, 1896

Opuntia parkeri

(Engelmann) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 446, 1896

Opuntia parmentieri

Pfeiffer, Otto & Dietr. Allgemeine Gartenzeitung 6. 276., 1838

Opuntia parryi

Engelmann, American Journal of Science, and Arts, ser. 2, 14 (42): 339, 1852

Opuntia parryi v. bernardina

(Engelmann ex Parish) Borg, Cacti 107, 1952

Opuntia parryi v. parryi

 

Opuntia parryi v. serpentina

(Engelmann) L.D. Benson, Cact. Calif. 88, 1969

Opuntia parva

A. Berger, Hort. Mortol. 234., 1912

Opuntia parviclada

S. Arias & Gama-Lopez, Flora del Valle de Tehuacan-Cuicatlan 14: 125, 1997

Opuntia parvispina

Salm-Dyck, Cact. Hort. Dyck. ed. 2. 238.,

Opuntia parvula

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 364, 1834

Opuntia pascoensis

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 101-102, t. 17, f. 1, 1919

Opuntia patagonica

R. Philippi, Linnaea. 33. (-65) 82., 1864

Opuntia peckii

J. A. Purpus, Mitteil. Deutsch. Dendrol. Ges., 63., 1925

Opuntia pelaguensis

Hort. Angl. ex Salm-Dyck, Cact. Hort. Dyck. ed. 2. 71,

Opuntia penicilligera

Spegazzini, Nova Addenda ad Floram Patagonicam . 4: 291, 1902

Opuntia pennellii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 219, f. 286, 1919

Opuntia pennellii ->5153

 

Opuntia pentlandii

Salm-Dyck, Allgemeine Gartenzeitung 13: 387, 1845

Opuntia pentlandii v. fuauxiana

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 6., 1958

Opuntia pentlandii v. rossiana

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 6., 1958

Opuntia perrita

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 33, 1912

Opuntia pescorvae

Le Conte ex Chapman, Flora of the southern United States 145, 1860

Opuntia pes-corvi

Kuntze, Rev. Gen. 260, 1891

Opuntia pestifer

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 217, f. 281, 1919

Opuntia phaeacantha

Engelmann, Memoirs of the American Academy of Arts and Science 4: 52, 1849

Opuntia phaeacantha f. brunnea

(Engelm.) Schelle, Proceedings of the American Academy of Arts and Sciences 3: 293, 1856 [1857]

Opuntia phaeacantha v. albispina

 

Opuntia phaeacantha v. angustata

Engelmann ex W.T. Marshall, Des. Bot. Gard. Ariz. Sci. Bull. 1: 94, 1950

Opuntia phaeacantha v. arenacea

 

Opuntia phaeacantha v. brunnea

 

Opuntia phaeacantha v. camanchica

(Engelmann & J. M. Bigelow) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia phaeacantha v. campestris

 

Opuntia phaeacantha v. charlestonensis

(Clokey) Backeberg, Cactaceae (Backeberg) 1: 508., 1958

Opuntia phaeacantha v. chihuahuensis

(Rose) H. Bravo Hollis, Cactaceas y suculentas mexicanas 19 (2): 47, 1974

Opuntia phaeacantha v. covillei

Fosberg, Bull. S. Calif. Acad. Sci. 33: 102., 1934

Opuntia phaeacantha v. decumbens

 

Opuntia phaeacantha v. discata

(Griffiths) L.D. Benson & Walk., Annals of the Missouri Botanical Garden 52: 265, 1965

Opuntia phaeacantha v. dulcis

 

Opuntia phaeacantha v. flavispina

L.D. Benson, Cact. Succ. J. (U. S. A.), 46 (2): 79., 1974

Opuntia phaeacantha v. gigantea

 

Opuntia phaeacantha v. laevis

(J.M. Coulter) L.D. Benson, The cacti of Arizona 21, 1969

Opuntia phaeacantha v. longispina

 

Opuntia phaeacantha v. major

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 293, 1856 [1857]

Opuntia phaeacantha v. mojavensis

(Engelmann & J. M. Bigelow) Fosberg, Bulletin of the Southern California Academy of Sciences 33: 103, 1934

Opuntia phaeacantha v. nigricans

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 293, 1865

Opuntia phaeacantha v. oklahomensis

 

Opuntia phaeacantha v. paucispina

 

Opuntia phaeacantha v. phaeacantha

 

Opuntia phaeacantha v. piercei

Fosberg, Bulletin of the Southern California Academy of Sciences 33: 102, 1934

Opuntia phaeacantha v. pseudopolyacantha

 

Opuntia phaeacantha v. sandiana

 

Opuntia phaeacantha v. silvatica

 

Opuntia phaeacantha v. spinosibacca

(M.S. Anthony) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia phaeacantha v. superbospina

(Griffiths) L.D. Benson, Cact. Succ. J. (U. S. A.), 46 (2): 79, 1974

Opuntia phaeacantha v. watsonii

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 437, 1896

Opuntia phaeacantha v. wootonii

(Griffiths) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia philippii

Haage & Sch. ex Bois, Dict. Hortic. 939,

Opuntia phyllacantha

Salm-Dyck ex Foerst., Handb. Cact. ed. I. 508, nomen.,

Opuntia phyllanthus

(L.) Mill., The Gardeners Dictionary: eighth edition, 1768

Opuntia picardae

Urb., Fedde, Repert. 16. 35, 1919

Opuntia picardoi

Marn.-Lapost., Cactus (Paris) 15 (66): 4, 1960

Opuntia piccolomini

Hort., ex Gartenfl. 36. 39., 1887

Opuntia piccolominiana

Parl., ex K. Schum. Gesamtb. Kakt. 741, in syn., 1898

Opuntia pilifera

F.A.C. Weber, Dictionaire d'Horticulture 894, 1898

Opuntia pilifera v. aurantisaeta

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia pinkavae

B.D. Parfitt, Rhodora 99 (899): 223-227, f. 1, 1997

Opuntia pintadera

Hort. ex Salm-Dyck, Cact. Hort. Dyck. ed. I. 47,

Opuntia pisciformis hyb.

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 258-259, f. 236, 1923

Opuntia pititache

(Karwinski ex Pfeiffer) F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 4: 166, 1898

Opuntia pittieri

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 188-189, f. 232, 1919

Opuntia pituitosa

(F. Ritter) Iliff, Cactaceae Consensus Initiatives 2: 9, 1997

Opuntia platyacantha

Salm-Dyck, Enum. Diagn. Cact. 103,

Opuntia platyacantha f. deflexispina

(Salm-Dyck) Schelle, Kakteen (Schelle) 58., 1926

Opuntia platyacantha f. mojavensis

(Engelmann) Schelle, Kakteen (Schelle) 72., 1926

Opuntia platyacantha v. angustispina

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 6., 1958

Opuntia platyacantha v. deflexispina

 

Opuntia platyacantha v. gracilior

Salm-Dyck, Cact. Hort. Dyck. 245. 1850, 1849

Opuntia platyacantha v. monvilli

Salm-Dyck, Cact. Hort. Dyck. 245. 1850, 1849

Opuntia platyacantha v. neoplatyacantha

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 6., 1958

Opuntia platynoda

Griffiths, Bull. Torr. Bot. Cl., 43. 526., 1916

Opuntia plumbea

Rose, Smithsonian Miscellaneous Collections 50: 524, 1908

Opuntia poecilacantha

Backeberg, Cactus, Paris, No. 75, 32; Backeb. Cactac. Handb. Kakteenk. 6. 3615 (1962). 1962

Opuntia poeppigii

Otto & Pfeiffer, Enumeratio Diagnostica Cactearum 174, 1837

Opuntia pollardii

Britton & Rose, Smithsonian Miscellaneous Collections 50: 523, 1908

Opuntia polyacantha

Haworth, Synopsis plantarum succulentarum . 82, 1819

Opuntia polyacantha v. albispina

J. M. Coulter, Contr. U. S. Natl. Herb. 3: 437., 1896

Opuntia polyacantha v. arenaria

(Engelmann) B.D. Parfitt, Cactus and Succulent Journal [U. S. ] 70 (4): 188, 1998

Opuntia polyacantha v. aurea

DJF 1223 

Opuntia polyacantha v. borealis

J. M. Coulter, Contr. U. S. Natl. Herb. 3: 436., 1896

Opuntia polyacantha v. erinacea

(Engelmann & J.M. Bigelow) B.D. Parfitt, Cact. Succ. J. (U. S. A.), 70 (4): 188: 1998

Opuntia polyacantha v. erythrostema

J. A. Purpus, Mitt. Deutsch. Dendrol. Ges.: 63. 1925, 1925

Opuntia polyacantha v. hystricina

(Engelmann & J.M. Bigelow) B.D. Parfitt, Cact. Succ. J. (U. S. A.), 70 (4): 188: 1998

Opuntia polyacantha v. juniperina

(Britton & Rose) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia polyacantha v. nicholii

(L.D. Benson) B.D. Parfitt, Cact. Succ. J. (U. S. A.), 70 (4): 188: 1998

Opuntia polyacantha v. platycarpa

J. M. Coulter, Contr. U. S. Natl. Herb. 3: 436., 1896

Opuntia polyacantha v. polyacantha

 

Opuntia polyacantha v. rufispina

(Engelmann & J. M. Bigelow) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia polyacantha v. salmonea

J. A. Purpus, Mitt. Deutsch. Dendrol. Ges.: 63. 1925, 1925

Opuntia polyacantha v. schweriniana

(K. Schumann) Backeberg, Die Cactaceae 1: 607, 1958

Opuntia polyacantha v. spirocentra

J. A. Purpus, Mitt. Deutsch. Dendrol. Ges.: 63. 1925, 1925

Opuntia polyacantha v. subinermis

J. A. Purpus, Mitt. Deutsch. Dendrol. Ges.: 62. 1925, 1925

Opuntia polyacantha v. trichophora

(Engelmann & J. M. Bigelow) J.M. Coulter, Contributions from the U. S. National Herbarium 3: 437, 1896

Opuntia polyacantha v. watsonii

J.M. Coulter, Contr. U. S. Natl. Herb. 3: 437., 1896

Opuntia polyantha

Haworth, Syn. Pl. Succ. 190.,

Opuntia polycarpa

Small, Manual of the Southeastern Flora 906, 1506, 1933

Opuntia polymorpha

Hort. Angl. ex Pfeiffer, Enum. Diagn. Cact. 103,

Opuntia porteri

Brandegee, Dictionaire d'Horticulture 899, 1898

Opuntia posnanskyana

Cárdenas, Lilloa 23: 25, f. 4, 1950

Opuntia pottsii

Salm-Dyck, Cacteae in Horto Dyckensi Cultae [ed. 1849] 236, 1849[1850]

Opuntia pottsii v. montana

 

Opuntia pottsii v. nova

 

Opuntia praecox

Forbes, Hort. Tour Germ. 160, nomen.,

Opuntia prasina

Spegazzini, Anales de Sociedad Cientifica Argentina 99: 103, 1925

Opuntia prate

Sabine ex Pfeiffer, Enum. Diagn. Cact. 155,

Opuntia procumbens

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 292, 1856 [1857]

Opuntia prolifera

Engelmann, American Journal of Science, and Arts, ser. 2, 14 (42): 338, 1852

Opuntia prostrata

Monville & Lemaire ex Forster, Handbuch der Kakteenkunde 478, 1846

Opuntia protracta

Lemaire, Handb. Cact. ed. I. 508, nomen.,

Opuntia pruinosa

Hort. ex Salm-Dyck, Cact. Hort. Dyck. ed. 2. 67,

Opuntia pseudo-tuna

Salm-Dyck, Obs. Bot. 7., 1822

Opuntia pseudo-udonis

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia puberula

Pfeiffer, Enumeratio Diagnostica Cactearum 156, 1837

Opuntia pubescens

J.C. Wendl. ex Pfeiffer, Enumeratio Diagnostica Cactearum 149, 1837

Opuntia puelchana

A. Castellanos, Physis, 9. 101., 1928

Opuntia pulchella

Engelmann, Trans. St. Louis Acad. 2: 201, 1863

Opuntia pulverulenta

Pfeiffer, Otto & Dietr. Allgemeine Gartenzeitung 8. 497., 1840

Opuntia pulvinata

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 119, 1828

Opuntia pumila

Rose, Smithsonian Miscellaneous Collections 50: 521, 1908

Opuntia punta-caillan

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia purpurea

R. Fries, Nov. Act. Soc. Sci. Upsal. Ser. 4. 1. no. 1, 123.,

Opuntia pusilla

(Haworth) Haworth, Synopsis plantarum succulentarum . 195, 1812

Opuntia puverula

Pfeiffer 

Opuntia pycnacantha

Auct., Just, Jahresb. 24. 2. 380, sphalm.,

Opuntia pycnacantha v. margaritana

-> pycnantha v. margaritana 

Opuntia pycnantha

Engelmann, Contributions from the U. S. National Herbarium 3 (7): 423-424, 1896

Opuntia pycnantha v. margaritana

J.M. Coulter, Contributions from the U. S. National Herbarium 3: 424, 1896

Opuntia pygmaea

(Wiegand & Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia pyriformis

Rose, Contributions from the U. S. National Herbarium 12 (7): 292, t. 26, f. 35, 1909

Opuntia pyrocarpa

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 90, 1916

Opuntia pyrracantha v. leucolutea

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 6., 1958

Opuntia pyrrhacantha

K. Schumann, Gesamtbeschreibung der Kakteen 694, 1898

Opuntia pyrrhantha

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 133, 1995

Opuntia quimilo

K. Schumann, Gesamtbeschreibung der Kakteen 746, 1898

Opuntia quipa hyb.

F.A.C. Weber (pro sp.), Dictionaire d'Horticulture 894, 1898

Opuntia quitensis

F.A.C. Weber, Dictionaire d'Horticulture 894, 1898

Opuntia rafinesquei

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 295, 1856 [1857]

Opuntia rafinesquei f. cymochila

(Engelmann & J. M. Bigelow) Schelle, Handbuch der Kakteenkultur. 50, 1907

Opuntia rafinesquei f. oplocarpa

(Engelmann ex J.M. Coulter) Schelle, Handbuch der Kakteenkultur. 50, 1907

Opuntia rafinesquei v. arkansana

(Engelmann ex Rumpler) Schelle, Handbuch der Kakteenkultur. 50, 1907

Opuntia rafinesquei v. fusiformis

Engelmann  1856

Opuntia rafinesquei v. microsperma

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 295, 1856

Opuntia rafinesquei v. minor

Engelmann, Rep. Expl. Surv. Pacific Ocean, Botany 4: 55, t. 11, f. 1, 1857

Opuntia rafinesquei v. parva

Haage & Schmidt, Verz. Blumenz. 1915: 29, 1915

Opuntia rafinesquei v. rafinesquei

 

Opuntia rafinesquii

Engelmann, Pacif. Rail. Rep. 4. 41. t. 11.,

Opuntia rafinesquii v. arkansana

Späth 

Opuntia rafinesquii v. grandiflora

Engelmann 

Opuntia rafinesquii v. macrorhiza

Engelmann 

Opuntia rafinesquii v. microsperma

Engelmann, Proc. Amer. Acad. Arts 3: 295., 1856

Opuntia rafinesquii v. minor

Engelmann & J. M. Bigelow 

Opuntia rafinesquii v. stenochila

Engelmann 

Opuntia rahmeri

R. Philippi, Anales del Museo Nacional. Santiago de Chile 1891: 27, 1891

Opuntia ramosissima

Engelmann, American Journal of Science, and Arts, ser. 2, 14 (42): 339, 1852

Opuntia ramulifera

Salm-Dyck, Dyck. Bot. Gart. 360, 1837

Opuntia rarissima

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 6, 1958

Opuntia rastrera

F.A.C. Weber, Dictionaire d'Horticulture 896, 1898

Opuntia rauhii

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia rauppiana

K. Schumann, Monatsschrift fur Kakteenkunde 118, 1899

Opuntia recondita

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 131, 1913

Opuntia recondita v. perrita

(Griffiths) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia recurvospina

Griffiths, Proc. Biol. Soc. Wash., 29. 12., 1916

Opuntia reflexa

Mackensen, Bulletin of the Torrey Botanical Club 39: 292, 1912

Opuntia reflexispina

Wiggins & Rollins, Contributions from the Dudley Herbarium 3 (8): 275-277, t. 59, f. 1-2, 1943

Opuntia reicheana

Espinosa, Bol. Mus. Nac. Chile, 18. 31., 1940

Opuntia repens

Bello, Anales de la Sociedad Espanola de Historia Natural 10: 277, 1881

Opuntia reptans

Karwinski ex W. Baxt., Loud. Hort. Brit. Suppl. 3. 599, nomen.,

Opuntia retrorsa

Spegazzini, Anal. Mus. Buenos Aires, 11. 517., 1905

Opuntia retrospina

 

Opuntia retrospinosa

Lemaire, Cact. Aliq. Nov. Desc. 35,

Opuntia rhodantha

K. Schumann, La Semaine Hort., 1897

Opuntia rhodantha v. spinosior

Boissev. & C. Davidson, Cactus and Succulent Journal [U. S. ] 15: 138, 1943

Opuntia rhodantha v. xanthostemma

Rehder, J. Arnold Arbor. 7: 149., 1926

Opuntia rileyi

J.G. Ortega, Fl. Ind. Sinaloa, 1929

Opuntia riojana

Hosseus, Kaktus-ABC, 429, indice, 113, in syn., 1935

Opuntia riparia

Griffiths, Proc. Biol. Soc. Wash., 27. 26., 1914

Opuntia ritteri

A. Berger, Kakteen 68, 1929

Opuntia riviereana

Backeberg, Die Cactaceae 6: 3628, 1962

Opuntia robinsonii

J.G. Ortega, Fl. Indig. Sinaloa, 1929

Opuntia roborensis

Cárdenas, Cactus and Succulent Journal [U. S. ] 42: 32, 1970

Opuntia robusta

Wendland, Pfeiffer, Enum. Cact. 165, 1837

Opuntia robusta v. albicans

Schelle, Handb. Kakteenkult. [Schelle] 57., 1907

Opuntia robusta v. guerrana

(Griffiths) Sanchez-Mejorada, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia robusta v. larreyi

(F.A.C. Weber) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia robusta v. longiglochidiata

Backeberg, Descr. Cact. Nov. 10., 1956

Opuntia robusta v. maxima

 

Opuntia robusta v. megacantha

Schelle, Handb. Kakteenkult. [Schelle] 57., 1907

Opuntia robusta v. megalarthra

(Rose) K. Hammer, Kulterpflanze, 24: 266, 1976

Opuntia robusta v. robusta

 

Opuntia robusta v. viridior

 

Opuntia romana cv.

 

Opuntia rosarica

G.E. Lindsay, Cactus and Succulent Journal [U. S. ] 14: 56, 1942

Opuntia rosea

Schumann, Ges. Kakt. 764, 1898, 1828

Opuntia roseana

Mackensen, Bulletin of the Torrey Botanical Club 38: 142, 1911

Opuntia rosiflora

K. Schumann, Gesamtb. Kakt. 1. 686,

Opuntia rossiana

(Heinrich & Backeberg) D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia rotundifolia

K. Schumann, Gesamtbeschreibung der Kakteen 652, 1899

Opuntia roxburghiana

Voigt, Hort. Suburb. Calc. 62,

Opuntia rubescens

Salm-Dyck ex DC., Prodromus Systematis Naturalis Regni Vegetabilis 3: 474, 1828

Opuntia rubiflora

Davidson, Bulletin of the Southern California Academy of Sciences 15 (2): 33, f. s. n. [pg. 32], 1916

Opuntia rubrifolia

Engelmann, U. S. Dept. Agric. Contrib. Nat. Herb. 3. 424.,

Opuntia rufescens

Salm-Dyck ex Foerst., Handb. Cact. ed. I. 493,

Opuntia rufida

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 298, 1856 [1857]

Opuntia rufida v. rufida

 

Opuntia rufida v. tortiflora

M. S. Anthony, American Midland Naturalist 55: 240, 1956

Opuntia rugosa

D. Griffiths, Proc. Biol. Soc. Wash., 27. 26., 1914

Opuntia ruiz-lealii

A. Castellanos, Lilloa 9: 213, 1943

Opuntia russellii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 94-5, f. 111, 1919

Opuntia ruthei

Hort. ex A. Berger, Hort. Mortol. 235., 1912

Opuntia rutila

Nutt., A Flora of North America: containing . 1 (4): 555, 1840

Opuntia rzedowskii

Scheinvar, Anales del Instituto de Biologia de la Universidad Nacional Autonoma de Mexico 47-53: 123, f. 1-7, 1984

Opuntia sabinii

Pfeiffer, Enumeratio Diagnostica Cactearum 147, 1837

Opuntia salagria

A. Castellanos, Lilloa 27: 85, f. 2, 1955

Opuntia salicornoides

Sprengel ex Pfeiffer, Enum. Diagn. Cact. 141,

Opuntia salmiana

Parm. ex Pfeiffer, Enumeratio Diagnostica Cactearum 172, 1837

Opuntia salmiana v. albiflora

(K. Schumann) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia salmiana v. spegazzinii

(F. A. C. Weber) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia salmii

Hort. ex Forbes, Hort. Tour Germ. 158, nomen.,

Opuntia salvadorensis

Britton & Standley, Journal of the Washington Academy of Sciences 15 (5): 104, 1925

Opuntia sanctae-barbarae

D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia sandiana

 

Opuntia sanfelipensis

J.P. Rebman, Haseltonia, 6: 17 ( publ. 1999), 1998

Opuntia sanguinea

C. Z. Nelson, Gatesburg Reg., 1915

Opuntia sanguinocula

D. Griffiths, Proceedings of the Biological Society of Washington 27: 26, 1914

Opuntia santamaria

(E. M. Baxter) Helia-H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia santamariae

(Baxter) H. Bravo Hollis, Cact. Suc. Mex. 17 (4): 119, as 'santamaria', 1972

Opuntia santa-rita

(Griffiths & Hare) Rose, Smithsonian Miscellaneous Collections 52: 195, 1908

Opuntia sarca

Griffiths ex L. Scheinvar, Phytologia, 49 (4): 328, 1981

Opuntia saxatilis

(F. Ritter) P.J. Braun & E. Esteves Pereira, Cactus and Succulent Journal [U. S. ] 63 (2): 82, 1991

Opuntia saxatilis v. minutispina

P.J. Braun & E. Esteves Pereira, Cactus and Succulent Journal [U. S. ] 67 (2): 108-112, f. 1-7, 1995

Opuntia saxatilis v. occibahiensis

P.J. Braun & E. Esteves Pereira, Cact. Succ. J. (U. S. A.), 63 (6): 311, 1991

Opuntia saxatilis v. pomosa

P.J. Braun & E. Esteves Pereira, Cact. Succ. J. (U. S. A.), 63 (3): 124, 1991

Opuntia saxatilis v. saxatilis

 

Opuntia saxicola

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 45, 1933

Opuntia scheeri

F.A.C. Weber, Dictionaire d'Horticulture 895, 1898

Opuntia scheinvariana

 

Opuntia schickendantzii

F.A.C. Weber, Dictionaire d'Horticulture 898, 1898

Opuntia schomburgkii

Hort. Berol. ex Salm-Dyck, Cact. Hort. Dyck. ed. I. 48, nomen.,

Opuntia schottii

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 304, 1856 [1857]

Opuntia schottii v. grahamii

(Engelmann) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 124, 1969

Opuntia schottii v. schottii

 

Opuntia schulzii

A. Castellanos & H.V. Lelong, Lilloa 10: 400, 1944

Opuntia schumanni

 

Opuntia schumannii

Spegazzini, Anales del Museo Nacional de Buenos Aires 11: 511, 1905

Opuntia schweriniana

K. Schumann, Monatsschrift fur Kakteenkunde 9: 148, 1899

Opuntia sect. Austrocylindropuntia

(Backeberg) Moran, Gentes Herbarum; occasional papers on the kind of plants 8 (4): 326, 1953

Opuntia sect. Consolea

(Lemaire) L. Benson, Cact. Succ. J. (U. S. A.), 46 (2): 80, 1974

Opuntia sect. Cylindricae

Engelmann, Boston Journal of Natural History 6 (2): 208, 1850

Opuntia sect. Cylindropuntia

(Engelmann) Moran, Baileya. 19 (4): 166, 1975

Opuntia sect. Tephrocactus

(Lemaire) Moran, Baileya. 19 (4): 166, 1975

Opuntia securigera

Borg, Cacti 67, 1937

Opuntia segethii

F. Phil., Botanische Zeitung. Berlin 26: 861, 1868

Opuntia seguina

C. Z. Nelson, Transactions of the Illinois State Academy of Science 12: 120, 1919

Opuntia semispinosa

Griffiths, Bull. Torr. Bot. Cl., 43. 89., 1916

Opuntia senilis

Roezl, La Belgique Horticole 24: 39, 1874

Opuntia ser. Ammophilae

 

Opuntia ser. Applanatae

Engelmann, Boston Journal of Natural History 6 (2): 206, 1850

Opuntia ser. Aurantiacae

 

Opuntia ser. Basilares

 

Opuntia ser. Bigelovianae

 

Opuntia ser. Brasilienses

 

Opuntia ser. Chaffeyanae

 

Opuntia ser. Clavarioides

 

Opuntia ser. Clavatae

 

Opuntia ser. Currassavicae

 

Opuntia ser. Dillenianae

 

Opuntia ser. Echinocarpae

Britton & Rose 

Opuntia ser. Elatae

 

Opuntia ser. Elatiores

 

Opuntia ser. Ficus-indicae

 

Opuntia ser. Floccosae

 

Opuntia ser. Fulgidae

 

Opuntia ser. Glomeratae

 

Opuntia ser. Heliabravoanae

L. Scheinvar, An. Inst. Biol. Univ. Nac. Auton. Mex., Bot., 45 (1): 85 ( publ. 1975). 1974

Opuntia ser. Imbricatae

 

Opuntia ser. Inamoenae

 

Opuntia ser. Leptocaules

 

Opuntia ser. Leucotrichae

 

Opuntia ser. Macdougalianae

 

Opuntia ser. Marenopuntiae

(Backeberg) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 118, 1972

Opuntia ser. Miquelianae

 

Opuntia ser. Nopaleae

(S.D.) Rowley, Rep. Pl. Succ., 22 (Regnum Veg., 87): 10, without basionym page, 1973

Opuntia ser. Orbiculatae

 

Opuntia ser. Palmadorae

 

Opuntia ser. Pentlandianae

 

Opuntia ser. Phaecanthae

 

Opuntia ser. Polyacanthae

 

Opuntia ser. Pseudogrusonia

H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia ser. Pumilae

 

Opuntia ser. Ramosissimae

 

Opuntia ser. Robusate

 

Opuntia ser. Salmianae

 

Opuntia ser. Scheerianae

 

Opuntia ser. Setispinae

 

Opuntia ser. Spinosissimae

 

Opuntia ser. Stenopetalae

 

Opuntia ser. Streptochanthae

 

Opuntia ser. Strigiles

 

Opuntia ser. Subulatae

 

Opuntia ser. Sulphureae

 

Opuntia ser. Thurberianae

Britton & Rose 

Opuntia ser. Tomentosae

 

Opuntia ser. Tortispinae

 

Opuntia ser. Tunae

 

Opuntia ser. Vestitae

 

Opuntia ser. Weberianae

 

Opuntia sericea

G. Don ex Salm-Dyck, Hort. Dyck. 363.,

Opuntia sericea v. longispina

Salm-Dyck, Hort. Dyck. 363., 1834

Opuntia sericea v. maelenii

Salm-Dyck, Cact. Hort. Dyck. 67, 237. 1850, 1849

Opuntia serpentina

Engelmann, American Journal of Science, and Arts, ser. 2, 14 (42): 338, 1852

Opuntia setigera

(Backeberg) W. T. Marsh., Cact. & Succ. Journ. Amer. 17. 114, 1945

Opuntia setispina

Engelmann, Cacteae in Horto Dyckensi Cultae [ed. 1849] 239, 1849[1850]

Opuntia shaferi

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 72, 1919

Opuntia shaferi v. humahuacana

(Backeberg) G.D. Rowley, Cact. Succ. J. Gr. Brit., 44 (1): 2: 1982

Opuntia shreveana

A. Nelson, Gatesburg Reg., 5680

Opuntia silvestris

Backeberg, Cactus Journ. 1. 7., 1932

Opuntia sinclairii

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 173-174, t. 28, 1910

Opuntia skottsbergii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 96-97, f. 114, 1919

Opuntia soederstromiana

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 221, f. 294, 1919

Opuntia soehrensii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 134-135, f. 169, 1919

Opuntia spathulata

(Otto) F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 4: 165, 1898

Opuntia speciosa

Steud., Nomenclator Botanicus. Editio secunda 2: 222, 1841

Opuntia spectatissima

(Daston) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia spegazzinii

F.A.C. Weber, Dictionaire d'Horticulture 898, 1898

Opuntia sphaeracantha

Graessn., Hauptverz., 10, nomen., 1937

Opuntia sphaerica

C. F. Forster, Hamburger Garten- und Blumenzeitung 17: 167, 1861

Opuntia sphaerica v. rauppiana

(K. Schumann) G.D. Rowley, National Cactus and Succulent Journal 13 (2): 25, 1958

Opuntia sphaerica v. unguispina

(Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (2): 25, 1958

Opuntia sphaerocarpa

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 300, 1856 [1857]

Opuntia sphaerocarpa v. utahensis

Engelmann, Transactions of the Academy of Science of St. Louis 11: 199, 1863

Opuntia spinalba

Rafin., Atl. Journ. 147 (Quid ?).

Opuntia spinaurea

Karwinski ex Salm-Dyck, Cact. Hort. Dyck. ed. I. 46,

Opuntia spiniflora

R. Philippi, Linnaea 30: 211, 1859

Opuntia spinosibacca hyb.

M.S. Anthony, American Midland Naturalist 55: 246, f. 22-23, 1956

Opuntia spinosior

(Engelmann) Toumey, Botanical Gazette 25: 119, 1898

Opuntia spinosior v. imbricata

(Haworth) DC. 

Opuntia spinosior v. neomexicana

Toumey, Botanical Gazette 25: 119, 1898

Opuntia spinosissima

Miller, The Gardeners Dictionary: eighth edition Opuntia no. 88, 1768

Opuntia spinotecta

D. Griffiths, Proceedings of the Biological Society of Washington 27: 24, 1914

Opuntia spinulifera

Salm-Dyck, Hortus Dyckensis ou Catalogue des Plantes . 364, 1834

Opuntia spinulosa

Salm-Dyck, Cact. Hort. Dyck. ed. I. 46, nomen.,

Opuntia spirocentra

Engelmann & Bigel. ex Haage, Verz. Cact. 30.,

Opuntia splendens

Hort. Angl. ex Pfeiffer, Enum. Diagn. Cact. 159,

Opuntia spraguei

J.G. Ortega, Fl. Ind. Sinaloa 6, 1929

Opuntia squarrosa

Griffiths, Bull. Torr. Bot. Cl., 43. 91., 1916

Opuntia staffordae

Bullock, Cactus Journal [London] 8: 15, 1939

Opuntia stanleyi

Engelmann in Emory, Notes Milit. Reconn. 2: 158., 1848

Opuntia stanlyi

Engelmann, Notes of a Military Reconnoissance 2: 158, 1848

Opuntia stanlyi v. kunzei

(Rose) L.D. Benson, Proc. Calif. Acad. Sci. 4th ser. 25: 248., 1944

Opuntia stanlyi v. parishii

(Orcutt) L.D. Benson, Cacti Ariz. 2nd. ed. 39., 1950

Opuntia stanlyi v. peeblesiana

L.D. Benson, The cacti of Arizona 20, 64, 1969

Opuntia stanlyi v. stanlyi

 

Opuntia stanlyi v. wrightiana

(E. M. Baxter) L. D. Benson, Proceedings of the California Academy of Sciences, Series 4, 25: 248, 1944

Opuntia stapeliae

De Candolle, Memoires du Museum d'Histoire Naturelle 17: 117, 1828

Opuntia steiniana

(Backeberg) G.D. Rowley, Nat. Cact. & Succ. Journ. 13. 4, 1958

Opuntia stellata

Salm-Dyck, Cact. Hort. Dyck. ed. I. 48; ed. 2. 73,

Opuntia stenarthra

K. Schumann, Monatsschrift fur Kakteenkunde 149, 1899

Opuntia stenochila

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 296, 1856 [1857]

Opuntia stenopetala

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 289, 1856

Opuntia stenopetala v. inerme

H. Bravo Hollis, Cactaceas y suculentas mexicanas 19 (1): 27, 1974

Opuntia stenopetala v. stenopetala

 

Opuntia stipata

(Coulter) K. Schumann, Gesamtb. Kakt. 679, 830, 1898

Opuntia straminea

Sencke ex Haage, Verz. Cact. 30.,

Opuntia streptacantha

Lemaire, Cactearum Genera Nova Speciesque Novae 62, 1839

Opuntia streptacantha v. pachona

(Griff.) K. Hammer, Kulterpflanze, 24: 262, 1976

Opuntia stricta

(Haworth) Haworth, Synopsis plantarum succulentarum . 191, 1812

Opuntia stricta v. dillenii

(Ker Gawl.) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 126, 1969

Opuntia stricta v. stricta

(Haworth) Haworth, Cactus and Succulent Journal (Los Angeles) 41 126., 1969

Opuntia strigil

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 290, 1856 [1857]

Opuntia strigil v. flexospina

(Griffiths) L.D. Benson, Cact. Succ. J. (U. S. A.), 46 (1): 79, 1974

Opuntia strigil v. strigil

 

Opuntia strobiliformis

A. Berger, Kakteen 53, la|4m. 9, 1929

Opuntia subarmata

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 94, t. 2, f. 1, t. 11, 13, f. 4, 1909

Opuntia subferox

Schott, Enumeratio Diagnostica Cactearum 167, 1837

Opuntia subg. Corynopuntia

(F.M. Knuth) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 118, 1972

Opuntia subg. Cylindropuntia

Engelmann, Proceedings of the American Academy of Arts and Sciences 3 302., 1857

Opuntia subg. Grusonia

(F. Reichenbach & K. Schumann) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 118, 1972

Opuntia subg. Nopalea

(Salm-Dyck) Z.Y. Li, Guihaia, 1 (4): 42, without basionym ref.: 1981

Opuntia subg. Opuntia

Mill., Proceedings of the American Academy of Arts and Sciences 3 289., 1857

Opuntia subg. Platyopuntia

Engler 

Opuntia subg. Tephrocactus

 

Opuntia subinermis

Link ex Steud., Nom. ed. 2. 2. 222, nomen.,

Opuntia subsphaerocarpa

Spegazzini, Anales de Sociedad Cientifica Argentina 99: 104, 1925

Opuntia subterranea

R. Fries, Nova Acta Regiae Societatis Scientiarum Upsaliensis, ser. 4, 1 (1): 122, 1905

Opuntia subulata

(Muehlenpf.) Engelmann, Gardener's Chronicle & Agricultural Gazette 19: 627, 1883

Opuntia subulata v. exaltata

(Berg.) Rowley, Repert. Pl. Succ. (I. O. S.), 23: 8 ( publ. 1974), without basionym date, 1972

Opuntia sulphurea

G. Don, Loudon's Hortus Britannicus. Second edition, 196, 1830

Opuntia sulphurea ssp. brachyacantha

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia sulphurea ssp. spinibarbis

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia sulphurea v. hildmannii

(R.E. Fries) Backeberg 

Opuntia sulphurea v. laevior

Salm-Dyck, Cact. Hort. Dyck. 67. 1850, 1849

Opuntia sulphurea v. major

Monville ex Lemaire, Cact. Gen. Sp. Nov. 71., 1839

Opuntia sulphurea v. pallidior

Monville ex Lemaire, Cact. Gen. Sp. Nov. 71., 1839

Opuntia sulphurea v. pampeana

(Spegazzini) Backeberg, Cactaceae (Backeberg) 1: 414., 1958

Opuntia superbospina

D. Griffiths, Proceedings of the Biological Society of Washington 29: 13, 1916

Opuntia syringacantha

Pfeiffer ex Foerst., Handb. Cact. ed. I. 470,

Opuntia tapona

Engelmann, Contributions from the U. S. National Herbarium 3: 423, 1896

Opuntia tarapacana

R. Philippi, Anales del Museo Nacional. Santiago de Chile 1: 27, 1891

Opuntia tardospina

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 34, t. 11, 15, 1912

Opuntia tayapayensis

Cárdenas, Lilloa 23: 18, 1950

Opuntia taylorii

Britton & Rose, Smithsonian Miscellaneous Collections 50: 520, 1908

Opuntia tehuacana

S. Arias & L.U. Guzman, Flora del Valle de Tehuacan-Cuicatlan 14: 131, 1997

Opuntia tehuantepecana

(H. Bravo Hollis) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 118, 1972

Opuntia tenajo

Auct., Just, Jahresb. 24. 2. 380, sphalm.,

Opuntia tenuiflora

Small, Manual of the Southeastern Flora 908, 1933

Opuntia tenuispina

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 294, 1856

Opuntia tephrocactoides

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 4, 1958

Opuntia teres

F. Cels ex F.A.C. Weber, Dictionaire d'Horticulture 898, 1898

Opuntia tesajo

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3: 448, 1896

Opuntia tessellata

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 309, 1856

Opuntia tessellata v. cristata

K. Schumann, Monatsschr. Kakteenk. 8: 70, pl., 1898

Opuntia testudinis v. crus

F. A. C. Weber, Bull. Mus. Hist. Nat. (Paris) 10: 389., 1904

Opuntia testudinis-crus

F.A.C. Weber 

Opuntia tetracantha hyb.

Toumey, Gard. & Forest 9: 432., 1896

Opuntia texana

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 92-93, t. 9, 13, f. 1, 1909

Opuntia thornberi

Thornber & Bonker, The Fantastic Clan 133, 148, f. p. 135, 1932

Opuntia thurberi

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 308, 1856

Opuntia thurberi ssp. versicolor

(Engelmann) Felger & Lowe, J. Arizona Acad. Sci. 6: 83., 1970

Opuntia thurberi v. alamosensis

(Britton & Rose) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia thurberi v. thurberi

 

Opuntia ticnamarensis

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia tidbaldi

J. M. Bigelow  1856

Opuntia tidballii

Bigel., in. Pacif. Rail. Rep. 4. 11,

Opuntia tilcarensis

Backeberg, Backeb. & F. M. Knuth, Kaktus-ABC, 128, 411., 1935

Opuntia tilcarensis v. rubellispina

Backeberg, Cactaceae (Backeberg) 6: 3617., 1962

Opuntia tomentella

A. Berger, Monatsschrift fur Kakteenkunde 20: 81, 1910

Opuntia tomentosa

Salm-Dyck, Observationes Botanicae in Horto Dyckensi 3: 8, 1822

Opuntia tomentosa v. hernandezii

(DC.) H. Bravo Hollis, Cactaceas y suculentas mexicanas 20 (4): 96, 1975

Opuntia tomentosa v. herrerae

L. Scheinvar, Phytologia, 49 (4): 332, 1981

Opuntia tomentosa v. rileyi

(J. G. Ortega) Backeberg, Cactaceae (Backeberg) 1: 542., 1958

Opuntia tomentosa v. spraguei

(J. G. Ortega) Backeberg, Cactaceae (Backeberg) 1: 542. as Spranguei, 1958

Opuntia tomentosa v. tomentosa

 

Opuntia tortispina

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 293, 1856 [1857]

Opuntia tortispina v. cymochila

(Engelmann & J. M. Bigelow) Backeberg, Die Cactaceae 1: 483, 1958

Opuntia tortispina v. tortispina

 

Opuntia toumeyi

Rose, Contributions from the U. S. National Herbarium 12: 402, 1909

Opuntia tracyi

Britton, Torreya 11: 152, 1911

Opuntia treleasii

Coulter, U. S. Dept. Agric. Contrib. Nat. Herb. 3. 434.,

Opuntia treleasii v. kerni

Griffiths & Hare, Bull. Agric. Exp. Sta. New Mex. Coll. Agric. Mech. Arts 60: 81., 1906

Opuntia triacantha

(Willd.) Sweet, Hortus Britannicus 172, 1826

Opuntia tribuloides

D. Griff., Monatsschr. Kakteenk., 23. 137., 1913

Opuntia trichophora

(Engelmann & J. M. Bigelow) Britton & Rose, Smithsonian Miscellaneous Collections 50: 535, 1908

Opuntia trichophora v. nova

 

Opuntia tricolor

D. Griffiths, Illustrated Studies in the Genus Opuntia. -- 2. 85-86, t. 4, upper f., 1909

Opuntia tuberculata

Haworth, Suppl. Pl. Succ. 80.,

Opuntia tuberculosirhopalica

(Wiegand & Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia tuberiformis

R. Philippi, Anal. Mus. nac. Chile 28., 1891

Opuntia tuberosa

Pfeiffer, Enumeratio Diagnostica Cactearum 146, 1837

Opuntia tuberosa v. spinosa

Pfeiffer, Enum. Diagn. Cact. 146., 1837

Opuntia tumida

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia tuna

(L.) Mill., The Gardeners Dictionary: eighth edition Opuntia no. 3, 1768

Opuntia tuna v. cubaguensis

Gentry, Allan Hancock Atlantic Exped., Rep. 2, Carrib. Mar. Alg. Rep. no. 6: 11., 1948

Opuntia tuna v. manse

Orcutt, W. Amer. Sci. 7: 157., 1891

Opuntia tuna-blanca

Spegazzini, An. Soc. Ci. Argent. 99. 107., 1925

Opuntia tunicata

(Lehmann) Link & Otto, Enumeratio Diagnostica Cactearum 170, 1837

Opuntia tunicata v. chilensis

(F. Ritter) A.E. Hoffmann J., Cactaceas en la flora silvestre de Chile: 242: 1989

Opuntia tunicata v. davisii

(Engelmann & J. M. Bigelow) L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 124, 1969

Opuntia tunicata v. laevior

Salm-Dyck, Cact. Hort. Dyck. 73, 250. 1850, 1849

Opuntia tunicata v. tunicata

 

Opuntia tunoidea

Gibbes, Proceedings of the Elliott Society of Natural History 1: 272, 1859

Opuntia tunoides

Britton & Shafer ex Bold., The Flora of the Dutch West Indian Islands 2: 81, 1914

Opuntia turbinata

Small, Manual of the Southeastern Flora 910, 1933

Opuntia turgida

Small, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 265, 1923

Opuntia turpinii

Lemaire, Cact. Aliq. Nov. Desc. 36.,

Opuntia turpinii v. polymorpha

Salm-Dyck, Cact. Hort. Dyck. 71. 1850, 1849

Opuntia tweediei

Hort. ex Schelle, Handb. Kakteenk. 58, in syn., 1907

Opuntia udonis

Weing., Kakteenkunde 1933: 71, 1933

Opuntia ula

Engelmann x O. kelvinensis 

Opuntia umbrella

Steud., Nom. ed. 2. 2. 222,

Opuntia undosa

D. Griffiths, Monatsschrift fur Kakteenkunde 23: 139, 1913

Opuntia undulata

D. Griffiths, Monatsschrift fur Kakteenkunde 22: 32, 1912

Opuntia unguispina

Backeberg, Blatter fur Kakteenforschung 1937-7, gen. 10, sp. 7, 1937

Opuntia urbaniana

Werdermann, Repertorium Specierum Novarum Regni Vegetabilis 29: 229, 1931

Opuntia ursina

F.A.C. Weber, Dictionaire d'Horticulture 2: 896, 1898

Opuntia utahensis

J.A. Purpus, Monatsschrift fur Kakteenkunde 19: 133, 1909

Opuntia utkilio

Spegazzini, Anal. Mus. Buenos Aires, 11. 516.,

Opuntia vaginata

Engelmann, Memoir of a Tour to Northern Mexico 100, 1848

Opuntia valida

D. Griffiths, Proceedings of the Biological Society of Washington 27: 24, 1914

Opuntia vaseyi hyb.

(J.M. Coulter) Britton & Rose (pro sp.), Smithsonian Miscellaneous Collections 50: 532, 1908

Opuntia vaseyi v. magenta

Parish in Jeps., Man. Fl. Pl. Calif. 657., 1925

Opuntia velutina

F.A.C. Weber, Bulletin du Museum d'Histoire Naturelle 10: 389, 1904

Opuntia velutina v. affinis

(Griffiths) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia velutina v. macdougaliana

(Rose) H. Bravo Hollis, Cactaceas y suculentas mexicanas 17 (4): 119, 1972

Opuntia velutina v. velutina

 

Opuntia verrucosa

Hort ex Cels, Cat. Cactees, 19, nomen., 1858

Opuntia verschaffeltii

F. Cels ex F.A.C. Weber, Dictionaire d'Horticulture 898, 1898

Opuntia verschaffeltii v. digitalis

F. A. C. Weber in Bois, Dict. Hort. 2: 898., 1898

Opuntia verschaffeltii v. floribunda

Borg in Borg, Cacti (Borg) 62., 1937

Opuntia verschaffeltii v. hypsophila

(Spegazzini) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia verschaffeltii v. longispina

(Backeberg) G.D. Rowley, Natl. Cact. Succ. J. 13: 4., 1958

Opuntia versicolor

Engelmann ex J.M. Coulter, Contributions from the U. S. National Herbarium 3: 452, 1896

Opuntia verticosa

Weing., Kakteenkunde 1933: 72, 1933

Opuntia vestita

Salm-Dyck, Allgemeine Gartenzeitung 13: 388, 1845

Opuntia vestita f. intermedia

(Backeberg) Krainz in Krainz, Kakteen (H. Krainz) 36: C 8. B., 1967

Opuntia vestita f. maior

(Backeberg) Krainz in Krainz, Kakteen (H. Krainz) 36: C 8. B., 1967

Opuntia vestita v. chuquisacana

(Cárdenas) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia vexans

D. Griffiths, Annual Report of the Missouri Botanical Garden 22: 28, 1912

Opuntia vilis

Rose, Contributions from the U. S. National Herbarium 12 (7): 293, t. 27, t. 36, 1909

Opuntia violacea

Engelmann, Emory, Notes Mil. Reconnois. 157.,

Opuntia violacea v. azurea

(Rose) Lodé, Fichier Encycl. Cact. Autres Succ., cf. Repert. Pl. Succ. (I. O. S.), Sér. 17: no. (1996), without basionym ref., species name not validly publ.; 47: 11 (publ. 1997): 1996

Opuntia violacea v. castetteri

L.D. Benson, Cactus and Succulent Journal [U. S. ] 41: 125, 1969

Opuntia violacea v. gosseliniana

(F.A.C. Weber) L.D. Benson, The cacti of Arizona 21, 1969

Opuntia violacea v. macrocentra

(Engelmann) L.D. Benson, The cacti of Arizona 21, 1969

Opuntia violacea v. santa-rita

(Griffiths & Hare) L.D. Benson, The cacti of Arizona 21, 1969

Opuntia violacea v. violacea

 

Opuntia virens

Tenore, Atti 7 Adun. Sci. Ital. 886, 1846

Opuntia virgata

Link & Otto, Handbuch der Kakteenkunde 990, 1846

Opuntia viridiflora hyb.

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 55, f. 65, 1919

Opuntia viridirubra

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 133, 1995

Opuntia viridirubra ssp. rubrogemmia

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia vitelliniflora

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta (Netherlands) 74 (3): 133, 1995

Opuntia vitelliniflora ssp. interjecta

(F. Ritter) P.J. Braun & E. Esteves Pereira, Succulenta, 74 (3): 133: 1995

Opuntia vivipara hyb.

Rose (pro sp.), Smithsonian Miscellaneous Collections 52: 153, 1908

Opuntia vulgaris

Miller, The Gardeners Dictionary: eighth edition Opuntia no. 1, 1768

Opuntia vulgaris v. balaerica

F. A. C. Weber in Bois, Dict. Hort. 2: 894., 1898

Opuntia vulgaris v. lemaireana

(Cons ex F. A. C. Weber) Backeberg, Cactaceae (Backeberg) 1: 400., 1958

Opuntia vulgaris v. major

Salm-Dyck, Observationes Botanicae in Horto Dyckensi 3: 9, 1822

Opuntia vulgaris v. media

Salm-Dyck, Observationes Botanicae in Horto Dyckensi 3: 9, 1822

Opuntia vulgaris v. nana

Schelle, Handbuch der Kakteenkultur. 50, 1907

Opuntia vulgaris v. rafinesquei

(Engelm.) A. Gray, A Manual of the Botany of the Northern United States. Second Edition 136, 1856

Opuntia vulgaris v. variegata

 

Opuntia vulpina

A. Web., Bois, Dict. Hortic. 895.,

Opuntia wagenknechtii

(F. Ritter) D.R. Hunt, Cactaceae Consensus Initiatives 4: 6, 1997

Opuntia wagneri

A. Weber, Bull. Mus. Hist. Nat. Par., 393., 1904

Opuntia weberi

Spegazzini, Anales del Museo Nacional de Buenos Aires 11: 509, 1905

Opuntia weberi v. setigera

(Backeberg) G. D. Rowley, Natl. Cact. Succ. J. 13: 25., 1958

Opuntia weingartiana

Backeberg, Blatter fur Kakteenforschung 1935-1938, gen. 10, subg. 4-a-b, sp. 2, 1935

Opuntia wentiana

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 116, 1919

Opuntia werneri

U. Eggli, Bradleya; Yearbook of the British Cactus and Succulent Society 10: 90, 1992

Opuntia wetmorei

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 4: 255-256, f. 234, 1923

Opuntia whipplei

Engelmann & J. M. Bigelow, Proceedings of the American Academy of Arts and Sciences 3: 307, 1856 [1857]

Opuntia whipplei v. enodis

Peebles, Journal of the Washington Academy of Sciences 30 (11): 473, 1940

Opuntia whipplei v. laevior

Engelmann, Proc. Amer. Acad. Arts 3: 307., 1856

Opuntia whipplei v. multigeniculata

(Clokey) L.D. Benson, The cacti of Arizona 20, 1969

Opuntia whipplei v. spinosior

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 307, 1856 [1857]

Opuntia whipplei v. viridiflora

(Britt. & Rose) L. Benson, Cact. Succ. J. (U. S. A.). 46 (2): 79, 1974

Opuntia whipplei v. whipplei

 

Opuntia whitneyana

E.M. Baxter, Calif. Cactus 37, 1935

Opuntia whitneyana v. albiflora

E.M. Baxter, Calif. Cactus 39, 1935

Opuntia whitneyana v. whitneyana

 

Opuntia wiegandii

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13 (1): 5, 1958

Opuntia wigginsii

L.D. Benson, The cacti of Arizona 19, 32, 1969

Opuntia wilcoxii

Britton & Rose, The Cactaceae; descriptions and illustrations of plants of the cactus family 1: 172, f. 211, 1919

Opuntia wilkeana

(Backeberg) Rowley, Nat. Cact. & Succ. Journ. 13. 6, 1958

Opuntia winteriana

A. Berger, Botanische Jahrbucher fur Systematik, Pflanzengeschichte und Pflanzengeographie 36: 455, 1906

Opuntia wolfei

(L.D. Benson) M.S. Baker, Madrono; Journal of the California Botanical Society 39: 108, 1992

Opuntia woodsii

Backeberg, Descriptiones Cactacearum Novarum 10, 1956

Opuntia wootonii

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 171-172, t. 26, upper fig., t. 27, 1910

Opuntia wrightiana

(E. M. Baxter) Peebles, Desert Plant Life 9: 45, 1937

Opuntia wrightii

Engelmann, Proceedings of the American Academy of Arts and Sciences 3: 308, 1856 [1857]

Opuntia xanthoglochia

D. Griffiths, Annual Report of the Missouri Botanical Garden 21: 166-167, t. 20, lower fig., 1910

Opuntia xanthostemma

K. Schumann, Gesamtb. Kakt. 1. 735.,

Opuntia xerocarpa

D. Griffiths, Proceedings of the Biological Society of Washington 29: 15, 1916

Opuntia yanganucensis

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13 (1): 5, 1958

Opuntia youngi

C. Z. Nelson, Trans. Illinois State Acad. Sci. 12: 119. Galesburg Rep. Reg. July 20, 1915, 1919

Opuntia zacana

J.T. Howell, Proceedings of the California Academy of Sciences, Series 4, 21: 48, 1933

Opuntia zacuapanensis

A. Berger, Hortus Mortolensis, 236, 413., 1912

Opuntia zamudioi

Scheinvar, Cact. Suc. Mex. 44 (4): 88 (-93; figs. 1-6). 1999

Opuntia zebrina

Small, Journal of the New York Botanical Garden 20: 35, t. 226, 1919

Opuntia zehnderi

(Rauh & Backeberg) G.D. Rowley, National Cactus and Succulent Journal 13: 6, 1958

Opuntia zuniensis

D. Griffiths, Bulletin of the Torrey Botanical Club 43: 86, 1916