| Name | Macrorhynchus heterophyllum Nuttall |
| Authorship | Nuttall |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Macrorhynchus |
| Citation | 1841 Trans. Amer. Philos. Soc. 7: 430 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Macrorhynchus heterophyllum Nuttall |
| Identification made in | [no date] (2) |
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