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Georg Ljungström
Sweden, gathering personalities such as sv:Axel Frithiof Åkerberg, sv:Viktor Pfeiff, and sv:Per Henrik Rudolf Cederschiöld, while influencing circles such
Plant List. Retrieved 23 December 2018. "Thelocactus bicolor (Galeotti ex Pfeiff.) Britton & Rose". Plants of the World Online. Retrieved 2024-05-04. "Thelocactus
List of botanists by author abbreviation (H)
Perrier – Joseph Marie Henry Alfred Perrier de la Bâthie (1873–1958) H.Pfeiff. – Hans Heinrich Pfeiffer (1890–1970) H.P.Fuchs – Hans Peter Fuchs (1928–1999)