| Name | Mesocarpus nummuloides (Hassall) Hassall |
| Authorship | (Hassall) Hassall |
| Rank | Species |
| Placed in | Mesocarpus Hassall |
| Citation | 1845 [Jul-Dec 1845] Hist. Brit. Freshwater Alg. 1: 169 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Mesocarpus nummuloides (Hassall) Hassall |
| Identification made in | [no date] (1) |