| Name | Cosmos nelsonii B. L. Robinson & Fernald |
| Authorship | B. L. Robinson & Fernald |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Cosmos |
| GUID | urn:lsid:ipni.org:names:198347-1 |
| Citation | 1909 Proc. Amer. Acad. Arts 44: 622 |
| Holdings | 3 Specimens held in the Harvard University Herbaria identified as Cosmos nelsonii B. L. Robinson & Fernald |
| Identification made in | [no date] (1), 1967 (1), 1997 (1) |