Lobivia knuthiana (Backeb.) H.P.Kelsey & Dayton, Standard. Pl. Names, ed. 2: 73. 1942 Lobivia knuthiana (Backeb.) H.P.Kelsey & Dayton, Standard. Pl. Names, ed. 2: 73. 1942is new combination for Trichocereus knuthianus Backeb. in Succulenta (Netherlands) 3: 42. 1937Taxon for this nameLobivia knuthiana (Backeb.) H.P.Kelsey & Dayton