| Name | Hydrophyllum macrophyllum var. occidentale S. Watson |
| Authorship | S. Watson |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Hydrophyllum macrophyllum Nuttall |
| GUID | urn:lsid:ipni.org:names:318532-2 |
| Citation | 1871 Botany [Fortieth Parallel] 248 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Hydrophyllum macrophyllum var. occidentale S. Watson |
| Identification made in | [no date] (6) |
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