| Cactaceae | |
Echinopsis achatina
| Hitchc. | Monatsschr. Kakteenk. 20: 143 | 1910 |
| Cactaceae | |
Echinopsis adolfofriedrichii
| G.Moser | Natl. Cact. Succ. J. 37: 39 | 1982 |
| Cactaceae | |
Echinopsis adolphofriedrichii
| Moser | | |
| Cactaceae | |
Echinopsis albispina
| A.C. Sm. | Monatsschr. Kakteenk. 13: 144 | 1903 |
| Cactaceae | |
Echinopsis albispinosa
| K. Schum. | Monatsschr. Kakteenk. 13: 154 | 1903 |
| Cactaceae | |
Echinopsis amblayensis
| Friedrich | Kakteen And. Sukk. 25: 82 | 1974 |
| Cactaceae | |
Echinopsis amoena
| A. Dietr. | Allg. Gartenzeitung 12: 187 | 1844 |
| Cactaceae | |
Echinopsis ancistrophora
| Speg. | Anales Mus. Nac. Buenos Aires 4: 492 | 1905 |
| Cactaceae | |
Echinopsis angelesiae
| (R. Kiesling) G.D. Rowley | | |
| Cactaceae | |
Echinopsis antezanae
| (Cárdenas) Friedrich & G.D. Rowley | | |
| Cactaceae | |
Echinopsis apiculata
| Linke | Wochenschr. Gärtnerei Pflanzenk. 1: 85 | 1858 |
| Cactaceae | |
Echinopsis arachnacantha
| (Buining & F. Ritter) Friedrich | Kakteen And. Sukk. 25(4): 82 | 1974 |
| Cactaceae | |
Echinopsis arboricola
| (Kimnach) Mottram | Cact. Consensus Initiat. 2: 8 | 1997 |
| Cactaceae | |
Echinopsis arebaloi
| Cárdenas | Cact. Succ. J. (Los Angeles) 28: 73, f. 47 | 1956 |
| Cactaceae | |
Echinopsis atacamensis
| (Phil.) Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis aurantiaca
| (Rausch) Friedrich & G.D. Rowley | I.O.S. Bull. 3: 94 | 1974 |
| Cactaceae | |
Echinopsis aurata
| Salm-Dyck | Cact. Hort. Dyck. 39 | 1849 |
| Cactaceae | |
Echinopsis aurea
| Britton & Rose | Cactaceae 3: 74, pl. 10, f. 1 | 1922 |
| Cactaceae | |
Echinopsis ayopayana
| F. Ritter & Rausch | Succulenta (Netherlands) 47: 85 | 1968 |
| Cactaceae | |
Echinopsis backebergii
| Werderm. | Neue Kakteen 84 | 1931 |
| Cactaceae | |
Echinopsis baldiana
| Speg. | Anales Mus. Nac. Buenos Aires 4: 490 | 1905 |
| Cactaceae | |
Echinopsis beckmannii
| Döll | Monatsschr. Kakteenk. 3: 103 | 1893 |
| Cactaceae | |
Echinopsis bertramiana
| (Backeb.) Friedrich & G.D. Rowley | | |
| Cactaceae | |
Echinopsis boeckmannii
| E.S. Burgess | Monatsschr. Kakteenk. 3: 165 | 1893 |
| Cactaceae | |
Echinopsis boedekeriana
| Harden | Jahrb. Deutsch. Kakteen-Ges. 1: 70 | 1936 |
| Cactaceae | |
Echinopsis bolligeriana
| Machler & Helmut Walter | Kakteen And. Sukk. 54(10): 269 | 2003 |
| Cactaceae | |
Echinopsis bonnieae
| Halda & Malina | Acta Mus. Richnov. Sect. Nat. 9: 57 | 2002 |
| Cactaceae | |
Echinopsis botuibensis
| F. Ritter | | |
| Cactaceae | |
Echinopsis boutillieri
| Parmentier in Foerster | Handb. Cacteenk. (ed. 2) 622 | 1885 |
| Cactaceae | |
Echinopsis boyuibensis
| F. Ritter | Succulenta (Netherlands) 44: 25 | 1965 |
| Cactaceae | |
Echinopsis brasiliensis
| Frić ex Pazout | | |
| Cactaceae | |
Echinopsis brasiliensis
| Fric ex Pazout | Friciana 17: 3 | 1963 |
| Cactaceae | |
Echinopsis breviflora
| M. Lowry | Cactaceae Syst. Init. 16: 7 | 2003 |
| Cactaceae | |
Echinopsis brevispina
| (F. Ritter) Friedrich & G.D. Rowley | I.O.S. Bull. 3: 94 | 1974 |
| Cactaceae | |
Echinopsis bridgesii
| Salm-Dyck | Cact. Hort. Dyck. [ed. 1849] 181 | 1849 [1850] |
| Cactaceae | |
Echinopsis bruchii
| (Britton & Rose) A. Cast. & Lelong | Gen. Sp. Pl. Argent. 1: 90 | 1943 |
| Cactaceae | |
Echinopsis bruchii
| H. Friedrich & Glaetzle | Bradleya 1: 96 | 1983 |
| Cactaceae | |
Echinopsis × cabrerae
| G.D. Rowley | | |
| Cactaceae | |
Echinopsis cachensis
| Speg. | Anales Mus. Nac. Buenos Aires 4: 493 | 1905 |
| Cactaceae | |
Echinopsis caespitosa
| J.A. Purpus | Monatsschr. Kakteenk. 27: 120 | 1917 |
| Cactaceae | |
Echinopsis caineana
| (Cárdenas) D.R. Hunt | Bradleya 9: 88 | 1991 |
| Cactaceae | |
Echinopsis cajasensis
| F. Ritter | Kakteen in Südamerika 2: 630 | 1980 |
| Cactaceae | |
Echinopsis calliantholilacina
| Cárdenas | | |
| Cactaceae | |
Echinopsis callichroma
| Cárdenas | | |
| Cactaceae | |
Echinopsis calochlora
| K. Schum. | Monatsschr. Kakteenk. 13: 108 | 1903 |
| Cactaceae | |
Echinopsis calorubra
| Cárdenas | Natl. Cact. Succ. J. 12(3): 62 | 1957 |
| Cactaceae | |
Echinopsis camarguensis
| (Cárdenas) Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis campylacantha
| Pfeiffer in Pfeiffer & Otto | Abbild. Beschr. Cact. 1: under t. 4. | 1839 |
| Cactaceae | |
Echinopsis campylacantha
| Pfeiff. & Otto | Abbild. Beschr. Cact. 1: t. 4 | 1838 |
| Cactaceae | |
Echinopsis candicans
| D.R. Hunt | | |
| Cactaceae | ** |
Echinopsis candicans
| F.A.C. Weber | Dict. Hort. 471 | 1896 |
| Cactaceae | |
Echinopsis cardenasiana
| (Rausch) Friedrich | Kakteen And. Sukk. 25(4): 82 | 1974 |
| Cactaceae | |
Echinopsis carmineiflora
| Friedrich | Kakteen And. Sukk. 25: 82 | 1974 |
| Cactaceae | |
Echinopsis catamarcensis
| F.A.C. Weber | Dict. Hort. 471 | 1896 |
| Cactaceae | |
Echinopsis caulescens
| M. Lowry | Cactaceae Syst. Init. 14: 13 | 2002 |
| Cactaceae | |
Echinopsis cavendishii
| Hortus | Monatsschr. Kakteenk. 20: 143 | 1910 |
| Cactaceae | |
Echinopsis cephalomacrostibas
| (Werderm. & Backeb.) Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis cerdana
| Cárdenas | Cactus (Paris) 65: 177 | 1959 |
| Cactaceae | |
Echinopsis chacoana
| Schütz | | |
| Cactaceae | |
Echinopsis chalaensis
| (Rauh & Backeb.) Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis chamaecereus
| (Speg.) H. Friedrich & Glaetzle | Bradleya 1: 96 | 1983 |
| Cactaceae | |
Echinopsis chamaecereus
| Friedrich & Glaetzle | | |
| Cactaceae | |
Echinopsis chereauniana
| Schlumb. | Rev. Hort. Bouches-du-Rhone 5: 402 | 1856 |
| Cactaceae | |
Echinopsis chiloensis
| (Colla) Friedrich & G.D. Rowley | IOS Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis chionantha
| (Speg.) Werderm. | Notizbl. Bot. Gart. Berlin-Dahlem 11: 264 | 1931 |
| Cactaceae | |
Echinopsis chrysantha
| Werderm. | | |
| Cactaceae | |
Echinopsis chrysochete
| Werderm. | Repert. Spec. Nov. Regni Veg. 39: 271 | 1936 |
| Cactaceae | |
Echinopsis cinnabarina
| (Hook.) Labour. | Monogr. Cact. 288 | 1853 |
| Cactaceae | |
Echinopsis clavata
| (F. Ritter) D.R. Hunt | Cact. Consensus Initiat. 4: 5 | 1997 |
| Cactaceae | ** |
Echinopsis clavatus
| (F. Ritter) D.R. Hunt | Cact. Consensus Initiat. 4: 5 | 1997 |
| Cactaceae | |
Echinopsis cochabambensis
| Backeb. | Descr. Cact. Nov. 28 | 1957 |
| Cactaceae | |
Echinopsis colmariensis
| K. Schum. | Gesamtbeschr. Kakt. 230 | 1897 |
| Cactaceae | |
Echinopsis colmarii
| Neubert | Deutsch. Mag. Garten- Blumenk. | 1878 |
| Cactaceae | |
Echinopsis columnaris
| Fernald | Monatsschr. Kakteenk. 20: 143 | 1910 |
| Cactaceae | |
Echinopsis comarapana
| Cárdenas | Natl. Cact. Succ. J. 12: 61 | 1957 |
| Cactaceae | |
Echinopsis conaconensis
| (Cárdenas) Friedrich & G.D. Rowley | | |
| Cactaceae | |
Echinopsis coquimbana
| (Molina) H. Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 94 | 1974 |
| Cactaceae | |
Echinopsis cordobensis
| Speg. | Anales Mus. Nac. Buenos Aires 4: 489 | 1905 |
| Cactaceae | |
Echinopsis coronata
| Cárdenas | Natl. Cact. Succ. J. 12: 63 | 1957 |
| Cactaceae | |
Echinopsis cotacajesii
| Cárdenas | | |
| Cactaceae | |
Echinopsis courantii
| (K. Schum.) Friedrich & G.D. Rowley | I.O.S. Bull. 3: 95 | 1974 |
| Cactaceae | |
Echinopsis crassicaulis
| H. Friedrich & Glaetzle | Bradleya 1: 96 | 1983 |
| Cactaceae | |
Echinopsis crassicaulis
| (R. Kiesling) Friedrich & Glaetzle | | |
| Cactaceae | |
Echinopsis cristata
| Salm-Dyck | Cact. Hort. Dyck. [ed. 1849] 178 | 1849 [1850] |
| Cactaceae | |
Echinopsis crysochete
| Werderm. | | |
| Cactaceae | |
Echinopsis cuzcoensis
| (Britton & Rose) Friedrich & G.D. Rowley | Int. Organ. Succ. Pl. Study Bull. 3(3): 95 | 1974 |
| Cactaceae | |
Echinopsis cylindracea
| Friedrich | Kakteen And. Sukk. 25: 82 | 1974 |
| Cactaceae | |
Echinopsis decaisneana
| (Lem.) Walp. | Repert. Bot. Syst. 2: 324 | 1843 |
| Cactaceae | |
Echinopsis deminuta
| F.A.C. Weber | Bull. Mus. Hist. Nat. (Paris) 10: 386 | 1904 |
| Cactaceae | |
Echinopsis densispina
| Werderm. | | |
| Cactaceae | |
Echinopsis derenbergii
| Frić | | |
| Cactaceae | |
Echinopsis derenbergii
| Fric | Möller's Deutsche Gärtn.-Zeitung 42: 436 | 1927 |
| Cactaceae | |
Echinopsis deserticola
| (Werderm.) Friedrich & G.D. Rowley | IOS Bull. 3(3): 95 | 1974 |
| Cactaceae | |
Echinopsis dobeana
| J.G. Lamb. | Cactus Argentine ed. 2: 51 | 1998 |
| Cactaceae | |
Echinopsis droegeana
| A. Berger | Monatsschr. Kakteenk. 1: 24 | 1891 |
| Cactaceae | |
Echinopsis ducis-pauli
| C.F. Först. ex Rümpler | Handb. Cacteenk. (ed. 2) 641 | 1885 |
| Cactaceae | |
Echinopsis dumeliana
| Cels ex Salm-Dyck | Cact. Hort. Dyck. 39 | 1849 |
| Cactaceae | |
Echinopsis dumesniliana
| Cels ex Schumann | Gesamtbeschr. Kakt. 69 | 1897 |
| Cactaceae | |
Echinopsis duvallii
| Wedd. | Monatsschr. Kakteenk. 1: 54 | 1891 |
| Cactaceae | |
Echinopsis elegans
| Seidenf. | Monatsschr. Kakteenk. 20: 143 | 1910 |