Volume 12, Issue 1, 2021
Dr C. A. Ludwig Bercht 06.02.1945 - 02.03.2021.
Gymnocalycium megatae subsp. holdii (Amerhauser)
Schädlich comb. nov.
Leopold Quehl and his Gymnocalycium quehlianum.
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We would like to express our warmest thanks to Mrs Iris Blanz (Austria) who supports us with the translation into English, to Mrs Larisa Zaitseva (Russia) for the translation into Russian, to Mr Victor Gapon (Russia) for the content corrections of the Russian edition, to Mr Takashi Shimada (Japan) for the translation into Japanese, to Mr Jiahui Lin (China) for the translation into Chinese, to Mr Václav Johanna (Czech Republic) for the translation into Czech and to Mr Daniel Schweich (France), who mirrors our publications under: http://www.cactuspro.com/biblio/.