| Name | Pleurosigma gracilentum Rabenhorst |
| Authorship | Rabenhorst |
| Rank | Species |
| Placed in | Pleurosigma W. Smith |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Pleurosigma gracilentum Rabenhorst |
| Identification made in | [no date] (1) |