| (115333-2) Gymnocactus gielsdorfianus Backeb. Jahrb. Deutsch. Kakteen-Ges. 1942
(133281-1) Gymnocactus gielsdorfianus Backeb. Cactaceae (Berlin)
__ The Plant Names Project (1999). International Plant Names Index. Published on the Internet; http://www.ipni.org [01 January 1970]
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