2019

Gymnocalycium kuehhasii Neuhuber et Sperling subsp. corneuspinum Sperling et Strub, subsp. nov.
Sperling, R.; Strub, T. (2019): New localities concerning the distribution of Gymnocalycium kuehhasii Neuhuber et Sperling. - Schütziana 10(2): p. 29-62.
Type: Cultivated flowering plant grown from seeds collected from the habitat. Holotype: Volker Schädlich VoS 10-807 (Herbarium WU 4117) (fig. 19).
Origin: The plants grow shaded under bushes in grass on stony ground, Argentina, province Santiago del Estero, east of Villa Ojo de Agua (S29°31.179, W63°38.134, altitude: 375 m. a. s. l.). First discovery 17th January 2010.

Gymnocalycium kuehhasii Neuhuber et Sperling subsp. incurvatispinum Sperling et Strub, subsp. nov.
Sperling, R.; Strub, T. (2019): New localities concerning the distribution of Gymnocalycium kuehhasii Neuhuber et Sperling. - Schütziana 10(2): p. 29-62.
Type: Cultivated flowering plant grown from seeds collected in the habitat, in alcohol. Holotype: Sperling SPE 142-63-2013 (Herbarium WU 4116).
Origin: The plants grow shaded under bushes in grass on stony ground in the province Córdoba, Argentina, southwest of San Francisco del Chañar (S29°55.053, W63°50.502, altitude: 600 m. a. s. l.). First discovery on 24th January 2013.

Gymnocalycium gaponii subsp. macrocarpum Řepka subsp. nov.
Řepka, R. (2019): A new subspecies of Gymnocalycium gaponii Neuhuber. - Gymnocalycium 32(1): p. 1301-1310.
Holotype: coll. Radomír Řepka sub no. RER 492, 22. Januar 2012 (PR 907715, Holotypus).
Origin: Argentina: part northwest, Córdoba Province, Ciénaga del Coro town, bank of unpaved road to Guasapampa, ca. 3,8 km south-west of the town, sandy soil, 1026 m a. s. l.; GPS 31°4'13.225''S, 65°18'15.558''W.

Gymnocalycium cardenasianum var. pseudocrassispinum Milt var. nov.
Milt, I. (2019): Gymnocalycium cardenasianum Ritter (historie druhu a popis nového taxonu). - Cactaceae etc. 29(1): p. 25-31.
Type: B172328 Herbarium of the Regional Museum of Olomouc (Czech Republic).
Origin: Bolivia, ca. 60 km south of Carrizal, on the mountain protrusion above the confluence of the rivers Rio Grande and Rio Higuerita.

Gymnocalycium x incurvatispinum (Sperling et Strub) Řepka comb. nov.
Řepka, R. (2019): Gymnocalycium kuehhasii and its variability. - Gymnocalycium 31(4): p. 1333-1344.
Holotype: Sperling SPE 142-63-2013 (Herbarium WU 4116). Cultivated flowering plant grown from seeds collected in the habitat, in alcohol.
Origin: Argentina, Province Córdoba, southwest of San Francisco del Chañar (S29°55.053, W63°50.502, altitude: 600 m. a. s. l.).
Basionym: Gymnocalycium kuehhasii subsp. incurvatispinum Sperling et Strub 2019.

Gymnocalycium hyptiacanthum subsp. callistum Prestlé subsp. nov.
Prestlé, K. H.; Till, H.; Amerhauser, H. (2019): Gymnocalycium hyptiacanthum in Uruguay und Rio Grande do Sul - Teil 1. - Gymnocalycium 32(2): p. 1318.
Type: Brasil, Rio Grande do Sul, Departement Quarai, Arroyo Cati, 270 m s.m.; leg. PR 1062, K. H. Prestlé, April 14th 1995 (RB, holo).
Origin: Brasil, Border regionl of Uruguay with Rio Grande do Sul, Departement Quarai, Northern side of Arroyo Cati, 270 m s.m.

Gymnocalycium hyptiacanthum subsp. rotundatum Prestlé subsp. nov.
Prestlé, K. H.; Till, H.; Amerhauser, H. (2019): Gymnocalycium hyptiacanthum in Uruguay und Rio Grande do Sul - Teil 1. - Gymnocalycium 32(2): p. 1317-1318.
Brasil, Rio Grande do Sul, near Harmonia, 250 m s.m.; leg. K. H. Prestlé PR 933-A; May 12th 1995 (RB, holo).
Origin: Brasil, Border region of Uruguay with Rio Grande do Sul, stony grassland near Harmonia, 250 m s.m.