| Name | Ionaspis lacustris (Withering) F. Lutzoni |
| Authorship | (Withering) F. M. Lutzoni |
| Rank | Species |
| Placed in | Ionaspis Th. Fries |
| Citation | 1995 Syst. Bot. 20(3): 253 |
| Holdings | 43 Specimens held in the Harvard University Herbaria identified as Ionaspis lacustris (Withering) F. Lutzoni |
| Identification made in | [no date] (41), 2018 (2) |