| Name | Leptodactylon watsonii (A. Gray) Rydberg |
| Authorship | (A. Gray) Rydberg |
| Rank | Species |
| Placed in | Leptodactylon Hooker & Arnott |
| Holdings | 4 Specimens held in the Harvard University Herbaria identified as Leptodactylon watsonii (A. Gray) Rydberg |
| Identification made in | [no date] (1), 1983 (3) |