| Name | Calamus zollingeri subsp. merrillii (Beccari) A. J. Henderson |
| Authorship | (Beccari) A. J. Henderson |
| Rank | Subspecies |
| Placed in | Calamus zollingeri Beccari |
| Citation | 25 May 2020 Phytotaxa 445(1): 468 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Calamus zollingeri subsp. merrillii (Beccari) A. J. Henderson |
| Identification made in | 2016 (2) |