| Name | Lycopodium williamsii F. E. Lloyd & Underwood |
| Authorship | F. E. Lloyd & Underwood |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Lycopodium Linnaeus |
| Citation | 1906 Bull. Torrey Bot. Club 33: 112 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Lycopodium williamsii F. E. Lloyd & Underwood |
| Identification made in | [no date] (1) |
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