| Name | Copiapoa megarhiza Britton & Rose |
| Authorship | Britton & Rose |
| Rank | Species |
| Placed in | Copiapoa Britton & Rose |
| Citation | 1922. (12 Oct 1922) Cactaceae (Britton & Rose) 3: 89 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Copiapoa megarhiza Britton & Rose |
| Identification made in | [no date] (1) |
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