| Name | Isoetes echinospora var. boottii Engelmann |
| Authorship | Engelmann |
| Rank | Variety |
| Placed in | Isoetes echinospora Durieu |
| Citation | 1867 Manual (Gray), ed. 5 676 |
| Holdings | 6 Specimens held in the Harvard University Herbaria identified as Isoetes echinospora var. boottii Engelmann |
| Identification made in | [no date] (3), 2017 (3) |
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