| Name | Mammillaria elongata var. tenuis K. Schumann |
| Authorship | K. Schumann |
| Rank | Variety |
| Placed in | Mammillaria elongata de Candolle |
| Citation | 1898 Gesamtbeschr. Kakt. 520 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Mammillaria elongata var. tenuis K. Schumann |
| Identification made in | [no date] (1) |
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