| Name | Keysseria extensa J. Koster |
| Authorship | J. Koster |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Keysseria |
| GUID | urn:lsid:ipni.org:names:227285-1 |
| Citation | 1966 Nova Guinea, Bot. 24: 607 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Keysseria extensa J. Koster |
| Identification made in | [no date] (2) |