| Oreocereus fossulatus rubrispinus F. Ritter | Bolivia, Plurinational State of | Ritter, F. | 100A | MO | Tropicos | 1298797 | no |
| Oreocereus trollii (Kupper) Backeb. | Bolivia, Plurinational State of | S.G. Beck & et al. | 22127 | MO | Tropicos | 3437306 | no |
| Oreocereus fossulatus (Labour.) Backeb. | Bolivia, Plurinational State of | E. Garcia | 655 | MO | Tropicos | 3437300 | no |
| Oreocereus celsianus (Lem. ex Salm-Dyck) Riccob. | Bolivia, Plurinational State of | S.G. Beck & et al. | 22044 | MO | Tropicos | 3437289 | no |
| Oreocereus leucotrichus (Phil.) Wagenkn. | Chile | Werdermann, Erich | 1069 | E | N/A | E00273351 | yes |
| Oreocereus celsianus (Lem.) Riccob. | Peru | J. N. Rose | 18958 | NY | N/A | 468135 | no |
| Oreocereus doelzianus sericatus (F.Ritter) Mottram | Unknown or unspecified country | | s.n. | K | Spirit Collection | 64700.000 | no |
| Oreocereus doelzianus calvus (Rauh & Backeb.) Mottram | Unknown or unspecified country | Knize, K. | KK345 | K | Spirit Collection | 65019.000 | no |
| Oreocereus doelzianus (Backeb.) Borg var. doelzianus | Unknown or unspecified country | Blackburn, T.N. | s.n. | K | Spirit Collection | 65042.000 | no |
| Cleistocactus oreocereus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 51322.000 | no |
| Oreocereus hempelianus (Guerke) D.Hunt | Unknown or unspecified country | Knize | KK1703 | K | Spirit Collection | 52276.000 | no |
| Oreocereus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 52285.000 | no |
| Oreocereus laxiareolatus Rauh & Backeb. | Unknown or unspecified country | Knize, K. | KK373 | K | Spirit Collection | 75966.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Knize, K. | KK1793 | K | Spirit Collection | 75967.000 | no |
| Oreocereus haynei perplexus | Unknown or unspecified country | Lau, De Munter | s.n. | K | Spirit Collection | 75968.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | Knize, K. | KK386 | K | Spirit Collection | 75969.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 75970.000 | no |
| Oreocereus haynei myriacanthus (Vaupel) Mottram | Unknown or unspecified country | Ritter, F. | FR587 | K | Spirit Collection | 75963.000 | no |
| Oreocereus laxiareolatus Rauh & Backeb. | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 75964.000 | no |
| Oreocereus oreodoxux (Ritter) Slaba | Unknown or unspecified country | Knize, K. | KK1591 | K | Spirit Collection | 75965.000 | no |
| Oreocereus madisoniorum (Hutch.) Rowley | Unknown or unspecified country | | s.n. | K | Spirit Collection | 63328.000 | no |
| Oreocereus aurantiacus (Vaupel) Ritter | Unknown or unspecified country | Ritter, F. | FR569 | K | Spirit Collection | 63329.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Lau | 115 | K | Spirit Collection | 75069.000 | no |
| Oreocereus formosus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75061.000 | no |
| Oreocereus intertextus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75062.000 | no |
| Oreocereus paucicostatus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75063.000 | no |
| Oreocereus madisoniorum | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75056.000 | no |
| Oreocereus weberbaueri | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75051.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | | s.n. | K | Spirit Collection | 75052.000 | no |
| Oreocereus aureiflorus | Unknown or unspecified country | Lau | 104 | K | Spirit Collection | 75054.000 | no |
| Oreocereus peruvianus conaikensis Donald & A.B.Lau | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76928.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | Knize, K. | KK380a | K | Spirit Collection | 76929.000 | no |
| Oreocereus paucicostatus F.Ritter | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76930.000 | no |
| Oreocereus haynei perplexus | Unknown or unspecified country | Ritter, F | FR592 | K | Spirit Collection | 76931.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | Knize, K. | KK372 | K | Spirit Collection | 76925.000 | no |
| Oreocereus haynei blancii | Unknown or unspecified country | Knize, K. | KK1459 | K | Spirit Collection | 76927.000 | no |
| Oreocereus laxiareolatus Rauh & Backeb. in Backeb. | Unknown or unspecified country | Knize, K. | KK374 | K | Spirit Collection | 76919.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | Knize, K. | KK387 | K | Spirit Collection | 76920.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 76915.000 | no |
| Oreocereus celendinensis | Unknown or unspecified country | Knize, K. | KK576 | K | Spirit Collection | 76961.000 | no |
| Oreocereus krahnii (Donald) Bregman | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76962.000 | no |
| Oreocereus hempelianus (Guerke) Oehme | Unknown or unspecified country | Knize, K. | KK1203 | K | Spirit Collection | 76964.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76954.000 | no |
| Oreocereus ritteri Buining | Unknown or unspecified country | De Herdt | s.n. | K | Spirit Collection | 76957.000 | no |
| Oreocereus haynei comacephala | Unknown or unspecified country | Norton, C | s.n. | K | Spirit Collection | 76959.000 | no |
| Oreocereus peruvianus neoperuviana (Backeb.) Slaba | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76950.000 | no |
| Oreocereus peruvianus | Unknown or unspecified country | Knize, K. | KK374 | K | Spirit Collection | 76951.000 | no |
| Oreocereus laxiareolatus Rauh & Backeb. in Backeb. | Unknown or unspecified country | Knize, K. | KK374 | K | Spirit Collection | 76952.000 | no |
| Oreocereus polzii Diers, Donald & Zecher | Unknown or unspecified country | Zecher, E. | EZ762 | K | Spirit Collection | 76944.000 | no |
| Oreocereus aureiflorus F.Ritter | Unknown or unspecified country | Lau | 104 | K | Spirit Collection | 76945.000 | no |
| Oreocereus haynei comacephala | Unknown or unspecified country | Knize, K. | KK573 | K | Spirit Collection | 76946.000 | no |
| Oreocereus peruvianus Britton & Rose | Unknown or unspecified country | ex Knize | s.n. | K | Spirit Collection | 76947.000 | no |
| Oreocereus haynei Britton & Rose | Unknown or unspecified country | Knize, K. | KK565 | K | Spirit Collection | 76949.000 | no |
| Oreocereus haynei Britton & Rose | Unknown or unspecified country | Knize, K. | KK565 | K | Spirit Collection | 76939.000 | no |
| Oreocereus fruticosa F.Ritter | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76940.000 | no |
| Oreocereus paucicostatus F.Ritter | Unknown or unspecified country | Knize, K. | KK1602 | K | Spirit Collection | 76941.000 | no |
| Oreocereus weberbaueri flammea (Donald) Slaba | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76943.000 | no |
| Oreocereus laxiareolata Rauh & Backeb. | Unknown or unspecified country | Knize, K. | s.n. | K | Spirit Collection | 76932.000 | no |
| Oreocereus haynei perplexus | Unknown or unspecified country | Ritter | FR592 | K | Spirit Collection | 76933.000 | no |
| Oreocereus oreodoxus (Ritter) Slaba | Unknown or unspecified country | Knize, K. | KK1591 | K | Spirit Collection | 76934.000 | no |
| Oreocereus doelzianus sericatus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 76935.000 | no |
| Oreocereus leucotrichus densilanatus | Unknown or unspecified country | Knize, K. | KK1117 | K | Spirit Collection | 76936.000 | no |
| Oreocereus paucicostatus | Unknown or unspecified country | Knize | 755 | K | Spirit Collection | 73472.000 | no |
| Oreocereus krahnii | Unknown or unspecified country | Knize | 758 | K | Spirit Collection | 74457.000 | no |
| Oreocereus haynei comacephala | Unknown or unspecified country | Knize | 1299 | K | Spirit Collection | 74458.000 | no |
| Oreocereus doelzianus sericatus (F.Ritter) J.Lodé | Unknown or unspecified country | Laurence, S.G. | s.n. | K | Spirit Collection | 74452.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 74453.000 | no |
| Oreocereus tuberculosus | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 74454.000 | no |
| Oreocereus haynei perplexus | Unknown or unspecified country | Knize | s.n. | K | Spirit Collection | 74456.000 | no |
| Oreocereus borchersii | Unknown or unspecified country | Knize | 377 | K | Spirit Collection | 74450.000 | no |
| Oreocereus peruvianus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74440.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74441.000 | no |
| Oreocereus peruvianus | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74434.000 | no |
| Oreocereus krahnii | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74437.000 | no |
| Oreocereus ritteri Cullmann | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74427.000 | no |
| Oreocereus aurantiacus calvescens | Unknown or unspecified country | Knize | 1793 | K | Spirit Collection | 74558.000 | no |
| Oreocereus peruvianus ined | Unknown or unspecified country | Knize | 387 | K | Spirit Collection | 74559.000 | no |
| Oreocereus haynei roseoalbus | Unknown or unspecified country | Lau, jr. A. | 173 | K | Spirit Collection | 74561.000 | no |
| Oreocereus haynei perplexus | Unknown or unspecified country | Lau, De Munter, | s.n. | K | Spirit Collection | 74554.000 | no |
| Oreocereus winteri | Unknown or unspecified country | Ritter | 691 | K | Spirit Collection | 74555.000 | no |
| Oreocereus weberbaueri flammea | Unknown or unspecified country | | s.n. | K | Spirit Collection | 74556.000 | no |
| Oreocereus haynei var. haynei | Unknown or unspecified country | ex Knize | 580 | K | Spirit Collection | 74557.000 | no |
| Oreocereus haynei comacephalus | Unknown or unspecified country | Knize | 1299 | K | Spirit Collection | 74567.000 | no |
| Oreocereus fossulatus (Lab.) Kimn. | Unknown or unspecified country | | 0 | K | Herbarium | K000251601 | no |
| Oreocereus leucotrichus Phil | Chile | Werdermann | 1069 | K | Herbarium | K000251600 | no |
| Oreocereus leucotrichus (Philippi) Wagenknecht | Unknown or unspecified country | Johnson | 0 | K | Herbarium | K000251599 | no |
| Oreocereus leucotrichus (Philippi) Wagenknecht | Unknown or unspecified country | Hutchison | 1239 | K | Herbarium | K000251598 | no |
| Oreocereus leucotrichus (Philippi) Wagenknecht | Unknown or unspecified country | Hutchison | 1237 | K | Herbarium | K000251597 | no |
| Oreocereus leucotrichus Backeb | Unknown or unspecified country | Rose | 18958 | K | Herbarium | K000251596 | no |
| Oreocereus leucotrichus Britton & Rose | Unknown or unspecified country | Stafford | 1021 | K | Herbarium | K000251595 | no |
| Oreocereus doelzianus (Backeberg) Kimnach | Unknown or unspecified country | Hutchison | 1697 | K | Herbarium | K000251594 | no |
| Oreocereus leucotrichus Britton & Rose | Unknown or unspecified country | Stafford | 1021 | K | Herbarium | K000251593 | no |
| Oreocereus trollii Kupper | Unknown or unspecified country | | s.n. | K | Herbarium | K000251846 | no |