| Name | Senecio semicordatus Mackenzie & Bush |
| Authorship | Mackenzie & Bush |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Senecio Linnaeus |
| Citation | 1905 Rep. (Annual) Missouri Bot. Gard. 16: 107 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Senecio semicordatus Mackenzie & Bush |
| Identification made in | [no date] (1), 1960 (1) |
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