| Name | Selaginella watsonii Underwood |
| Authorship | Underwood |
| Rank | Species |
| Placed in | Selaginella P. Beauvois |
| Citation | 1898 Bull. Torrey Bot. Club 25(3): 127 |
| Holdings | 52 Specimens held in the Harvard University Herbaria identified as Selaginella watsonii Underwood |
| Identification made in | [no date] (38), 1952 (14) |