| Name | Ephedra trifurca Torrey ex S. Watson |
| Authorship | Torrey ex S. Watson |
| Rank | Species |
| Placed in | Ephedra Linnaeus |
| Citation | 1871 Botany [Fortieth Parallel] 329 |
| Holdings | 114 Specimens held in the Harvard University Herbaria identified as Ephedra trifurca Torrey ex S. Watson |
| Identification made in | [no date] (63), 1922 (1), 1939 (3), 1965 (19), 1979 (28) |
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