Cephalocereus parvispinus S.Arias, H.J.Tapia & U.Guzmán in Phytotaxa 392(2): 150. 2019 Cephalocereus parvispinus S.Arias, H.J.Tapia & U.Guzmán in Phytotaxa 392(2): 150. 2019Taxon for this nameCephalocereus parvispinus S.Arias, H.J.Tapia & U.Guzmán in Phytotaxa 392(2): 150. 2019