Melocactus zehntneri f. douradaensis (Hovens & Strecker) Guiggi in Cactology 5 (Suppl. 8): 3. 2020
Melocactus zehntneri f. douradaensis in Cactology 5 (Suppl. 8): 3. 2020
is later isonym of Melocactus zehntneri f. douradaensis in Cactus & Co. 8: 262. 2004
is new combination for Melocactus douradaensis in Succulenta (Netherlands) 63(1): 3. 1984