Cereus inermis Otto ex Pfeiff., Enum. Diagn. Cact.: 116. 1837 Cereus inermis Otto ex Pfeiff., Enum. Diagn. Cact.: 116. 1837is basionym for Mediocactus inermis (Otto ex Pfeiff.) Doweld in Sukkulenty 4(1-2): 42. 2002 ["2001"]is basionym for Selenicereus inermis (Otto ex Pfeiff.) Britton & Rose, Cactaceae 2: 207. 1920Taxon for this nameCereus inermis Otto ex Pfeiff.