| Name | Alternanthera flavogrisea subsp. diffusa (Martius) Mears |
| Authorship | (Martius) Mears |
| Rank | Subspecies |
| NomenclaturalStatus | Unknown |
| Placed in | Alternanthera flavogrisea (Urban) Urban |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Alternanthera flavogrisea subsp. diffusa (Martius) Mears |
| Identification made in | [no date] (1) |
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