| Name | Helianthus maximilianii var. asperrimus Engelmann & A. Gray |
| Authorship | Engelmann & A. Gray |
| Rank | Variety |
| NomenclaturalStatus | NomLeg |
| Placed in | Helianthus maximilianii Schrader |
| Citation | 1845 Boston J. Nat. Hist. 5(2): 249 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Helianthus maximilianii var. asperrimus Engelmann & A. Gray |
| Identification made in | [no date] (1), 2008 (1) |
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