| Name | Psilactis tenuis S. Watson | 
| Authorship | S. Watson | 
| Rank | Species | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Psilactis A. Gray | 
| GUID | urn:lsid:ipni.org:names:239979-1 | 
| Citation | 1891 Proc. Amer. Acad. Arts 26: 139 | 
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Psilactis tenuis S. Watson | 
| Identification made in | [no date] (1) |