Backeberg, Curt
Aucune.
Gymnocactus gielsdorfianus (Werdermann) Backeberg 1935
Gymnocactus horripilus (Lemaire) Backeberg 1951
Gymnocactus knuthianus (Bödeker) Backeberg 1951
Gymnocactus mandragora (Frič ex A.Berger) Backeberg 1961
Gymnocactus saueri (Bödeker) Backeberg 1942
Gymnocactus subterraneus (Backeberg) Backeberg 1951
Gymnocactus valdezianus (H.Möller) Backeberg 1966
Gymnocactus viereckii (Werdermann) Backeberg 1951
Gymnocactus ysabelae (Schlange) Backeberg 1961