| Name | Opuntia megasperma J. T. Howell |
| Authorship | J. T. Howell |
| Rank | Species |
| Placed in | Opuntia |
| Citation | 1933 Proc. Calif. Acad. Sci. Series 4, 21: 46 |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Opuntia megasperma J. T. Howell |
| Identification made in | [no date] (4) |
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