Harrisia guelichii (Speg.) Britton & Rose, Cactaceae 2: 158. 1920 Harrisia guelichii (Speg.) Britton & Rose, Cactaceae 2: 158. 1920is new combination for Cereus guelichii Speg. in Anales Mus. Nac. Buenos Aires, ser. 3, 4: 482. 1905Taxon for this nameHarrisia guelichii (Speg.) Britton & Rose