Neomammillaria echinaria (DC.) Britton & Rose = Mammillaria elongata subsp. echinaria (DC.) D.R. Hunt
English:
Echinaria;

https://archive.org/stream/cactaceaedescri04brit#page/136/mode/2up
homotypic synonyms:
Cactus echinaria (DC.) Kuntze; Chilita echinaria (DC.) Orcutt; Leptocladia echinaria (DC.) Buxb.; Mammillaria echinaria DC.;

protologue: Cactaceae 4: 136 (1923)

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