| Name | Selaginella extensa Underwood |
| Authorship | Underwood |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Selaginella P. Beauvois |
| GUID | urn:lsid:ipni.org:names:232090-2 |
| Citation | 1898 Bull. Torrey Bot. Club 25: 131 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Selaginella extensa Underwood |
| Identification made in | [no date] (1) |
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