Helianthocereus grandiflorus (Britton & Rose) Backeb. in Cactus (Paris) 45: 210. 1955 Helianthocereus grandiflorus (Britton & Rose) Backeb. in Cactus (Paris) 45: 210. 1955is new combination for Lobivia grandiflora Britton & Rose, Cactaceae 3: 57. 1922Taxon for this nameHelianthocereus grandiflorus (Britton & Rose) Backeb.