| Name | Helianthus laetiflorus var. subrhomboideus (Rydberg) Fernald |
| Authorship | (Rydberg) Fernald |
| Rank | Variety |
| Placed in | Helianthus laetiflorus Persoon |
| Citation | 1946 Rhodora 48: 79 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Helianthus laetiflorus var. subrhomboideus (Rydberg) Fernald |
| Identification made in | [no date] (1) |
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