| Name | Gayophytum diffusum subsp. diffusum A. Gray & Torrey |
| Authorship | A. Gray & Torrey |
| Rank | Subspecies |
| Placed in | Gayophytum diffusum Torrey & A. Gray |
| Holdings | 33 Specimens held in the Harvard University Herbaria identified as Gayophytum diffusum subsp. diffusum A. Gray & Torrey |
| Identification made in | [no date] (28), 1962 (5) |
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