| Classification | Isoetaceae: Isoetes | 
| Harvard University Herbaria Barcode(s) | 00744833 | 
| Type Status | Syntype | 
| Collector | M. L. Fernald | 
| Country | United States of America | 
| State | Maine | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Maine: Hancock County: Mount Desert Island | 
| Locality | north of Long Pond, Mt. Desert Island | 
| Date Collected | 1892-09-22 [Sept. 22, 1892] | 
| Habitat | Pond | 
| Container | Maine Flora, Hancock Co. | 
| Project | New England Vascular Plants TCN | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/c0747440-cc1a-4c49-9a94-264bda4b9e52 | 
| Harvard University Herbaria Barcode | 00744833 | 
| Herbarium | GH | 
| Family | Isoetaceae | 
| Type Status | Syntype | 
| Syntype of | Isoetes ×harveyi A. A. Eaton | 
| Verified by | Kittredge, Walter Tobey | 
| Date Determined | 2018 | 
| Determination Remarks | [filed under] | 
| Taxon Reference | (for  Isoetes ×harveyi A. A. Eaton) Fernwort Pap. 1900. 11. | 
| Family | Isoetaceae | 
| Determination | Isoetes sp. | 
| Determined by | Kittredge, Walter Tobey | 
| Date Determined | 2018 | 
| Determination Remarks | [current name] | 
| Annotation Text | Isoetes lacustris x tuckermanii fide Troia et al, Phytotaxa 277(2): 101-145. 2016 | 
| Family | Isoetaceae | 
| Determination | Isoetes tuckermani var. borealis A. A. Eaton | 
| Determined by | Eaton, Alvah Augustus | 
| Date Determined | 1903-02-** | 
| Family | Isoetaceae | 
| Determination | Isoetes ×harveyi A. A. Eaton | 
| Determination Remarks | [label name] | 
| Annotation Text | n. sp. | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |