| Name | Orthocaulis attenuatus (Martius) A. Evans |
| Authorship | (Martius) A. Evans |
| Rank | Species |
| Placed in | Orthocaulis |
| Citation | 1938 Ann. Bryol. 10: 4 |
| Holdings | 72 Specimens held in the Harvard University Herbaria identified as Orthocaulis attenuatus (Martius) A. Evans |
| Identification made in | [no date] (71), 1979 (1) |