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CCDB → Bryophytes → Orthotrichaceae → Ephemerum
| Taxon name | Status | Median (n) |
| Ephemerum cohaerens (Hedw.) Hampe | Accepted | 27 |
| Ephemerum crassinervium (Schwägr.) Hampe | Accepted | 27 |
| Ephemerum crassinervium (Schwägr.) Hampe | Accepted | 27 |
| Ephemerum crassinervium var. texanum (Grout) V. S. Bryan & L. E. Anderson | Accepted | 27 |
| Ephemerum serratum (Schreb.) Hampe | Accepted | 27 |
| Ephemerum spinulosum Bruch & Schimp. | Accepted | 27 |
| Ephemerum megalosporum (Austin) E. S. Salmon | Synonym of Micromitrium megalosporum Austin | 22 |