| Name | Pentachaeta fragilis Brandegee |
| Authorship | Brandegee |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Pentachaeta Nuttall |
| GUID | urn:lsid:ipni.org:names:188072-2 |
| Citation | 1915 Univ. Calif. Publ. Bot. 6: 170 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Pentachaeta fragilis Brandegee |
| Identification made in | [no date] (3), 1970 (2) |