Gymnocalycium schroederianum subsp. boessii R.Kiesling, Marchesi & O.Ferrari in Kakteen And. Sukk. 53: 226. 2002 Gymnocalycium schroederianum subsp. boessii R.Kiesling, Marchesi & O.Ferrari in Kakteen And. Sukk. 53: 226. 2002Taxon for this nameGymnocalycium schroederianum subsp. boessii R.Kiesling, Marchesi & O.Ferrari