Notocactus ottonis subsp. horstii (F.Ritter) Doweld in Sukkulenty 3: 55. 2000
Notocactus ottonis subsp. horstii in Sukkulenty 3: 55. 2000
is new combination for Notocactus arechavaletae var. horstii, Kakteen Südamerika 1: 166. 1979
Notocactus ottonis subsp. horstii in Sukkulenty 3: 55. 2000
Taxon for this name