2017

Gymnocalycium alenae Kulhánek 2017
Kulhánek, T. (2017): Gymnocalycium alenae Kulhánek species nova. - Schütziana 8(2): p. 24-38.
Type: Argentina, province Córdoba: Sobremonte, Estancia La Quinta, in pure meadowland together with Acacia caven Molina on sandy ground, northwest of the cross, which connects the RP 22 and the side road RP 18, 648 m s.m., leg. T. Kulhánek Tom 09-502/1, J
Argentina, province Córdoba: Sobremonte, Estancia La Quinta.

Gymnocalycium gertii subsp. evelyniae Gapon et Neuhuber 2017
Neuhuber, G.; Gapon, V. (2017): Gymnocalycium gertii subsp. evelyniae Neuhuber et Gapon subsp. nov. - Kaktus Klub (1): p. 23-29.
Type: Argentina, border of Provinces of Córdoba and San Luis, Sierra de Comechingones, near Piedra Blanca, 1015 m above sea level, collected by V. Gapon VG11-1170, 27 of December 2011. Holotypus: WU Inventar Nr. 3912, plant in liquore alcoholico (VG11-117
Argentina, Prov. Córdoba, western foothills of the mountain range of the Sierra de Comechingones, in vicinity of the village Piedra Blanca, 1010-1030 m above sea level.

Gymnocalycium marekiorum Milt 2017
Milt, I. (2017): Gymnocalycium marekiorum Ivan Milt species nova. - Cactaceae etc. 27(4): p. 133-135.
Type: B 171.825 in the Regional Muzeum Olomouc (holo); The type culture in the collection of Ivan Milt, the original collect VoS 49 (volker Schädlich).
Bolivia, Santa Cruz, VoS 03-49, near Villa Esperanza, southeast of the compressor station.

Gymnocalycium ponomarevae Gapon et Neuhuber 2017
Gapon, V.; Neuhuber, G. (2017): Gymnocalycium ponomarevae Gapon et Neuhuber spec. nov. - The Cactus Explorer (18): p. 44-53.
Type: Argentina, Provincia Catamarca, prope Vilisman, 1157 m s.m., leg. V. Gapon VG10-988/4547, 04.02.2010. Holotypus: WU (Inventar Nr. 4028, planta in liquore alcoholico); Isotypus: WU (Inventar Nr. 4029, 4030, flos in liquore alcoholico).
Argentina, prov. Catamarca, west of Villa El Alto, at Vilisman, 1157 m s.m.

Gymnocalycium pugionacanthum var. stejskalii Milt 2017
Milt, I. (2017): Gymnocalycium pugionacanthum Backeberg var. stejskalii Ivan Milt var. nov. - Cactaceae etc. 27(2): p. 68-69.
Type: B 171480, type culture under nr. 900 in collection I. Milt (OLM sect. Botany, holo).
Argentina, prov. Catamarca, Andalgala in higher positions.

Gymnocalycium spegazzinii var. recii Milt 2017
Milt, I. (2017): Gymnocalycium spegazzinii Britton & Rose var. recii Ivan Milt var. nov. - Cactaceae etc. 27(2): p. 33-36.
Type: Argentina, Quilmes, Nr. 96Q ex coll. I. Milt, plant from importseeds (B 171479 OLM sect. Botany, holo.).
Argentina, Quilmes, Ruinas del Quilmes.