List of taxa in Subgenus Malacocarpus

aciculatus n.n.

Note: Provisional name for orthacanthus.

acuatus (Link et Otto) Theunissen

Verh. Ver. Beförd. Gartenb., 3:424, Berlin 1827
Succulenta 60 (6):140-142, 1981.

acuatus var. depressus Spegazzini

Cact. Plat. Tentamen, 496-497, Buenos Aires 1905
Note: Transferred to a variety of tephracanthus.

acuatus var. prolifer Ritter

Note: Synonym of prolifer.

albiflorus n.n.

attenuata n.n.

beltranii (Fric ex Fleischer et Schütz) Schäfer [MC]

Friciana 8 (50):33-34, 36-37, 1975
Kakteen-Sukkulenten 14 (1-4):36, 1979.

bertramii

Note: Misspelling of beltranii ?

bezrucii (Fric) Schäfer

Praktický rádce 17 (7,8):100, 110, 1922
Kakteen-Sukkulenten 14 (1-4):36-37, 1979.

bezrucii var. centrispinus (Fric) Theunissen

Praktický rádce 17 (7):110, 1922
Succulenta 60 (6):140-142, 1981.

bezrucii var. corniger (Fric) Theunissen

Praktický rádce 17 (7):110, 1922
Succulenta 60 (6):140-142, 1981.

calvescens Gerloff et Nilson

Internoto 15 (3):75-83, 1994.

cephalophorus n.n.

congregatus n.n.

Prov. Desc.: K. H. Prestlé, Internoto 5 (4):138-140, 1984.

corynodes

Note: Reduced to a form of erinaceus.

courantii (Lemaire) Theunissen

Cact. aliq. nov. ins. Hort. Monv., 20, Paris 1838
Succulenta 60 (6):140-142, 1981
Note: Reduced to a variety of sellowii.

curtinensis n.n.

dalvae n.n.

discophalium n.n.

Note: Provisional name of neohorstii var. prestlei.

erinaceus (Haworth) Krainz

Supplementum Plantarum Succulentarum, 74, London 1819
Kakt. u. a. Sukk. 17 (10):195-196, 1966.

erinaceus fa. corynodes (Otto ex Pfeiffer) Gerloff

Enumeratio Diag. Cact., 55, Berlin 1837
Notokakteen, 152-153, 1995.
Note: Type species for the Subgenus

erinaceus var. kovarikii n.n.

Note: Synonym of kovarikii.

erinaceus var. leucocarpus n.n.

Note: Synonym of leucocarpus.

erinaceus var. macrocanthus n.n.

Note: Synonym of macrocanthus.

erinaceus var. spinosior n.n.

Note: Synonym of tephracanthus.

ernestii n.n

Note: Synonym of pauciareolatus.

flaviflorus n.n.

Note: Synonym of albiflorus.

fricii

Note: Reduced to a form of sellowii.

fricii var. robustior n.n.

Note: Only a name ?

gladiatus n.n.

glochidiatus n.n.

Note: Misspelling of gladiatus ?

grandicornis n.n.

hamesterii n.n.

hennisii n.n.

Note: Only a name.

horridispinus n.n.

infernensis n.n.

Note: Synonym of dalvae ?
Prov. Desc.: K. H. Prestlé, Internoto 5 (3):98-99, 1984.

infernensis fa. atrispinus n.n.

Prov. Desc.: K. H. Prestlé, Internoto 5 (3):99, 1984.

intricatus (Link et Otto) Herter

Verh. Ver. Beförd. Gartenb., 3:428, Berlin 1827
Cactus 120, 1954.

invictus n.n.

kovarikii (Fric ex Berger) Krainz

Kakteen, 206, Stuttgart 1929
Kakt. u. a. Sukk. 17 (10):195-196, 1966.

langsdorfii (Lehmann) Krainz

Index seminum hort. Hamburg, 17, 1827
Kakt. u. a. Sukk. 17 (10):195-196, 1966.

langsdorfii ssp. multiceps Hofacker et Herm

KuaS, 50(3): 62-64, 1999.

langsdorfii ssp. pulvinatus (Van Vliet) Hofacker et Herm

Succulenta 49 (4):50-52, 1970
KuaS 50(3):62, 1999

langsdorfii var. leprosorum (Ritter) Hofacker

Kakt. in Süd., 1:194-195, Spangenberg 1979
Internoto 14 (4):124, 1993.

langsdorfii var. longispinus (Ritter) Gerloff

Kakt. in Süd., 1:198-199, Spangenberg 1979
Internoto 14 (2):78-79, 1993.

langsdorfii fa. eddiewarasii n.n.

Prov. Desc.: N. Gerloff, Internoto 14 (2):78, 1993.

langsdorfii fa. prolifer (Ritter) Gerloff

Kakt. in Süd., 1:199, Spangenberg 1979
Internoto 14 (2):76-77, 1993.

leprosorum (Ritter) Havlicek

Kakt. in Süd., 1:194-195, Spangenberg 1979
Kaktusy 81 17 (1):7-9, 1981
Note: Reduced to a variety of langsdorfii.

leucocarpus

Note: Reduced to a form of sellowii.

longispinus (Ritter) Havlicek

Kakt. in Süd., 1:198-199, Spangenberg 1979
Kaktusy 81 17 (1):7-9, 1981
Note: Reduced to a variety of langsdorfii.

macrocanthus (Arechavaleta) Schäfer

Flora Uruguaya, 5:230-232, Montevideo 1905
Kakteen-Sukkulenten 14 (1-4):59, 1979
Note: Reduced to a form of sellowii.

macrogonus (Arechavaleta) Schäfer

Flora Uruguaya, 5:232-234, Montevideo 1905
Kakteen-Sukkulenten 14 (1-4):60, 1979
Note: Reduced to a form of sellowii.

maldonadensis (Herter) Herter

Florula Uruguayensis,90, Montevideo 1930
Note: Reduced to a variety of neoarechavaletae.

neoarechavaletae (Schumann ex Spegazzini) Havlicek

Cact. Plat. Tentamen, 494, Buenos Aires 1905
Kakt. Vilag 18 (4):79, 1988.

neoarechavaletae var. kovarikii n.n.

Note: Synonym of kovarikii.

neoarechavaletae var. marchesii n.n.

neoarechavaletae var. maldonadensis (Herter ex Herter) Havlicek

Florula Uruguayensis,90, Montevideo 1930
Internoto 14 (4):126-127, 1994.

neoarechavaletae fa. nigrispinus n.n.

And forms from the following localities:

Garzon, Punta ballena, Treinta y Tres and Tupambae,.

neohorstii (Ritter) Theunissen

Kakt. in Süd., 1:199-200, Spangenberg 1979
Succulenta 60 (6):140-142, 1981.

neohorstii var. juvenaliformis (Ritter) Theunissen

Kakt. in Süd., 1:200, Spangenberg 1979
Succulenta 60 (6):140-142, 1981
Note: Reduced to a form.

neohorstii var. prestlei Gerloff

Internoto 16 (1):3-17, 1995.

neohorstii fa. juvenaliformis (Ritter) Gerloff

Kakt. in Süd., 1:200, Spangenberg 1979
Internoto 14 (2):73, 1993.

neohorstii fa. ravenditii n.n.

nivosus n.n.

Note: Transitional taxon between Malacocarpus and Mammulosi
Prov. Desc.: K. H. Prestlé, Internoto 5 (2):59-61, 1984.

nivosus var. albiflorus n.n.

Prov. Desc.: K. H. Prestlé, Internoto 13 (2):46-49, 1992.

nivosus var. clavarioides n.n.

nivosus var. gracilispinus n.n.

oreophilus n.n.

"patagonicus"

Note: Synonym of Austrocactus patagonicus

pauciareolatus (Arechavaleta) Krainz

Flora Uruguaya, 5:246-247, Montevideo 1905
Kakt. u. a. Sukk. 17 (10):195-196, 1966
Note: Reduced to a form of sellowii.

paucicostatus n.n.

polyacanthus (Link et Otto) Theunissen

Verh. Ver. Beförd. Gartenb., 3:422, Berlin 1827
Succulenta 60 (6):140-142, 1981
Note: Synonym of langsdorfii.

prolifer (Ritter) Theunissen

Kakt. in Süd., 1:199, Spangenberg 1979
Succulenta 60 (6):140-142, 1981
Note: Reduced to a form of langsdorfii.

pseudopulvinatus n.n.

Note: Synonym of pulvinatus ?

pulvinatus

Note: Reduced to a subspecies of langsdorfii.

rubricostatus

Note: Reduced to a form of sellowii.

schaeferianus (Abraham et Theunissen) Havlicek

Internoto 9 (1):21-25, 1988
Internoto 9 (2):39, 1988
Note: Synonym of turbinatus ?

sellowii (Link et Otto) Theunissen

Verh. Ver. Beförd. Gartenb., 3:425, Berlin 1827
Succulenta 60 (6):140-142, 1981.

sellowii var. courantii (Lemaire) Gerloff

Cact. aliq. nov. ins. Hort. Monv., 20, Paris 1838
Internoto 14 (2):73, 1993.

sellowii var. turbinatus (Arechavaleta) Havlicek

Flora Uruguaya, 5:235-237, Montevideo 1905
Internoto 15 (3):89, 1994.

sellowii fa. fricii (Arechavaleta) Gerloff

Flora Uruguaya, 5:244-246, Montevideo 1905
Notokakteen, 163, 1995.

sellowii fa. leucocarpus (Arechavaleta) Gerloff

Flora Uruguaya, 5:239-242, Montevideo 1905
Notokakteen, 164, 1995.

sellowii fa. macrocanthus (Arechavaleta) Gerloff

Flora Uruguaya, 5:230-232, Montevideo 1905
Internoto 14 (2):72, 1993.

sellowii fa. macrogonus (Arechavaleta) Havlicek

Flora Uruguaya, 5:232-234, Montevideo 1905
Internoto 15 (3):89, 1994.

sellowii fa. pauciareolatus (Arechavaleta) Gerloff

Flora Uruguaya, 5:246-247, Montevideo 1905
Internoto 14 (2):72-73, 1993.

And forms from the following localities:

Catalan Grande, Cerro Accolorado, Cerro de Montevideo, Cuchilla Areicua, Cunapiru, Laguna Garzon and Punta de la Arena.

sellowii fa. rubricostatus (Fric ex Fleischer et Schütz) Gerloff

Friciana 8 (50):37, 1975
Notokakteen, 165, 1995.

sessiliflorus (Hooker) Krainz

Curtis's Botanical Magazine, 64, 1837
Kakt. u. a. Sukk. 17 (10):195-196, 1966.
Note: Backeberg (Die Cactaceae, 3:1621, Jena 1959) and Britton and Rose (The Cactaceae 3:188, 1920) both state that Mackie was the original author.

sessiliflorus var. debilacanthus n.n.

sessiliflorus var. martinii (Labouret ex Rümpler) Krainz

Handbuch der Cacteenkunde, 454-455, Leipzig 1886
Kakt. u. a. Sukk. 17 (10):195-196, 1966.

sessiliflorus var. pauciareolatus n.n.

sessiliflorus var. stegmannii (Backeberg) Havlicek

Die Cactaceae, 3:1623, Jena 1959
Internoto 15 (4):129, 1994.

And forms from the following localities:

Saavedra, Sierra de la Ventana and Sierra de Tandil.

stegmannii (Backeberg) Krainz

Die Cactaceae, 3:1623, Jena 1959
Kakt. u. a. Sukk. 17 (10):195-196, 1966
Note: Reduced to a variety of sessiliflorus.

tephracanthus (Link et Otto) Krainz

Verh. Ver. Beförd. Gartenb., 3:422, Berlin 1827
Kakt. u. a. Sukk. 17 (10):195-196, 1966.

tephracanthus var. depressus (Spegazzini) Stuchlík

Cact. Plat. Tentamen, 494, Buenos Aires 1905
Rod Notocactus 147, 1993.

tetracanthus n.n.

theunissianus n.n.

tricornis n.n.

turbinatus (Arechavaleta) Krainz

Flora Uruguaya, 5:235-237, Montevideo 1905
Kakt. u. a. Sukk. 17 (10):195-196, 1966
Note: Reduced to a variety of sellowii.

viridiflavus n.n.

vorwerkianus (Werdermann) Krainz

Neue Kakteen, 101-102, Frankfurt 1931
Kakt. u. a. Sukk. 17 (10):195-196, 1966
Note: A variety of sessiliflorus ?

Transitional forms

• With Mammulosi: allosiphon, buiningii, nivosus and orthacanthus

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