| Name | Riella americana M. Howe & Underwood |
| Authorship | M. Howe & Underwood |
| Rank | Species |
| Placed in | Riella |
| Citation | 1903 Bull. Torrey Bot. Club 30: 218 |
| Holdings | 5 Specimens held in the Harvard University Herbaria identified as Riella americana M. Howe & Underwood |
| Identification made in | [no date] (5) |
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