Photo of flowering plant attached; specimen apparently made from cultivated plant. Annotated as holotype by L. Scheinvar (1975). Typification somewhat ambiguous; protologue, "collected on Cerro San Felipe, in 1907, and flowered in 1913".
Britton, N. L. & Rose, J. N. 1923. Cactaceae. 4: 103.
9 Jun 1907
Plantae Dicotyledonae Caryophyllales Cactaceae
Neomammillaria conzattii Britton & Rose
Greenhouse Accession No. : 07.373
Specimen apparently made from cultivated plant; still bears original stake with greenhouse accession number 07.373 (same as holotype). Possibly an isotype or clonotype but with no original labeling other than greenhouse stake.