| Name | Isoetes echinospora var. muricata (Durieu) Engelmann |
| Authorship | (Durieu) Engelmann |
| Rank | Variety |
| Placed in | Isoetes echinospora Durieu |
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Isoetes echinospora var. muricata (Durieu) Engelmann |
| Identification made in | [no date] (2) |
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