| Name | Isoetes howellii Engelmann |
| Authorship | Engelmann |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Isoetes Linnaeus |
| Citation | 1882 Trans. Acad. Sci. St. Louis 4: 385 |
| Holdings | 55 Specimens held in the Harvard University Herbaria identified as Isoetes howellii Engelmann |
| Identification made in | [no date] (53), 1944 (1), 1996 (1) |
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