| 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) |