| Name | Dyckia microcalyx var. inermis Hassler |
| Authorship | Hassler |
| Rank | Variety |
| Placed in | Dyckia microcalyx Baker |
| Citation | 1919 Annuaire Conserv. Jard. Bot. Geneve 20: 307. |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Dyckia microcalyx var. inermis Hassler |
| Identification made in | 1986 (2) |
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