Mammillaria crucigera Salm-Dyck species synonym

Neomammillaria chiocephala (J.A.Purpus) Britton & Rose species synonym

Mammillaria microthele Muehlenpf. species synonym

Neomammillaria chionocephala (J.A.Purpus) Britton & Rose species synonym

Mammillaria formosa var. microthele (Muehlenpf.) Salm-Dyck variety synonym

Mammillaria formosa subsp. formosa subspecies accepted

Mammillaria ritteriana Boed. species synonym

Neomammillaria ritteriana (Boed.) Y.Itô species synonym

Mammillaria microthele Muehlenpf. ex Tiegel species synonym

Cactus formosus (Galeotti ex Scheidw.) Kuntze species synonym

Mammillaria formosa subsp. microthele (Muehlenpf.) D.R.Hunt subspecies accepted

Mammillaria formosa var. laevior Monv. ex Labour. variety synonym

Mammillaria formosa var. gracilispina Monv. ex Labour. variety synonym

Mammillaria formosa var. dispicula Monv. ex Labour. variety synonym

Mammillaria formosa subsp. chionocephala (J.A.Purpus) D.R.Hunt subspecies accepted

Mammillaria compacta Salm-Dyck species synonym

Mammillaria chionocephala J.A.Purpus species synonym

Mammillaria caerulea R.T.Craig species synonym

Mammillaria brongniartii Salm-Dyck species synonym

Mammillaria arroyensis Repp. species synonym

Mammillaria ritteriana var. quadricentralis R.T.Craig variety synonym

Mammillaria microthele var. brongniartii Salm-Dyck variety synonym

Neomammillaria ritteriana var. quadricentralis (R.T.Craig) Y.Itô variety synonym

Neomammillaria neoformosa (Galeotti ex Scheidw.) Y.Itô species synonym

Neomammillaria formosa (Galeotti ex Scheidw.) Britton & Rose species synonym

Mammillaria formosa var. laevior Monv. variety homotypic synonym

Neomammillaria chinocephala (J.A.Purpus) Britton & Rose species synonym

Mammillaria formosa var. gracilispina Monv. variety homotypic synonym

Mammillaria formosa var. dispicula Monv. variety homotypic synonym