Seticereus icosagonus var. ferruginea (Backeb.) Backeb., Kakteenlex.: 406. 1966
Seticereus icosagonus var. ferruginea, Kakteenlex.: 406. 1966
is new combination for Seticereus ferrugineus in Cactaceae (Berlin) 1937(2): 14. 1937
Seticereus icosagonus var. ferruginea, Kakteenlex.: 406. 1966
Taxon for this name