| Name | Horkelia tridentata subsp. flavescens (Rydberg) D. D. Keck |
| Authorship | (Rydberg) D. D. Keck |
| Rank | Subspecies |
| Placed in | Horkelia tridentata Torrey |
| Holdings | 7 Specimens held in the Harvard University Herbaria identified as Horkelia tridentata subsp. flavescens (Rydberg) D. D. Keck |
| Identification made in | [no date] (7) |
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