| Name | Isoetes lacustris var. paupercula Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| Placed in | Isoetes lacustris Linnaeus |
| Citation | 1882 Trans. Acad. Sci. St. Louis 4: 377 |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Isoetes lacustris var. paupercula Engelmann |
| Identification made in | [no date] (1), 2017 (1) |
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