| Name | Aphanostephus riddellii Torrey & A. Gray |
| Authorship | Torrey & A. Gray |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Aphanostephus de Candolle |
| Citation | 1842 Fl. N. Amer. [Torr. & A. Gray] 2: 189 |
| Holdings | 59 Specimens held in the Harvard University Herbaria identified as Aphanostephus riddellii Torrey & A. Gray |
| Identification made in | [no date] (13), 1945 (6), 1972 (40) |
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