| Classification | Isoetaceae: Isoetes | 
| Barcode(s) | 02074867 | 
| Collector | L. Griscom & H. K. Svenson | 
| Collector number | 5561 | 
| Country | United States of America | 
| State | Virginia | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Virginia: Frederick County | 
| Locality | Passage Creek. | 
| Date Collected | 1933-07-02 | 
| Habitat | Shallow water. | 
| Project | US and Canada - Mass Digitization | 
| Remarks | Macrospore average 650 u | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/f0336ffa-27df-4f84-9782-8af8a803254e | 
| Harvard University Herbaria Barcode | 02074867 | 
| Herbarium | GH | 
| Previous ownership | [ex] Brooklyn Botanic Garden Herbarium | 
| Family | Isoetaceae | 
| Determination |  Isoetes lacustris Linnaeus | 
| Determined by | Musselman, L. J. & Knepper, D. A. | 
| Date Determined | 1994-01-** | 
| Determination Remarks |  [filed under] [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |