| Name | Isoetes flaccida Shuttleworth ex A. Braun |
| Authorship | Shuttleworth ex A. Braun |
| Rank | Species |
| Placed in | Isoetes Linnaeus |
| Citation | 1846 Flora 29: 178 |
| Holdings | 36 Specimens held in the Harvard University Herbaria identified as Isoetes flaccida Shuttleworth ex A. Braun |
| Identification made in | [no date] (31), 2007 (5) |