| Name | Pentachaeta exilis subsp. exilis | 
| Authorship | |
| Rank | Subspecies | 
| NomenclaturalStatus | NomLeg | 
| Placed in | Pentachaeta exilis A. Gray | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Pentachaeta exilis subsp. exilis | 
| Identification made in | 1970 (2) |