| Name | Helianthus nuttallii subsp. rydbergii (Britton) R. W. Long |
| Authorship | (Britton) R. W. Long |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Helianthus nuttallii Torrey & A. Gray |
| GUID | urn:lsid:ipni.org:names:119197-2 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Helianthus nuttallii subsp. rydbergii (Britton) R. W. Long |
| Identification made in | [no date] (1) |
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