| Classification | Plantaginaceae: Callitriche | 
| Barcode(s) | 00466775 | 
| Collector | C. B. Hellquist & L. Crouch | 
| Collector number | 12606 | 
| Country | United States of America | 
| State | Oklahoma | 
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Oklahoma: Johnston County | 
| Locality | on the west side of Rte. 99, 0.1 mile south of the jct. of Rtes. 99 & 7, 6.1 miles south of Connorville, Sec. 26, T2S, R4E | 
| Date Collected | 1978-06-11 | 
| Habitat | small farm pond | 
| Container | Flora of Oklahoma | 
| Project | US and Canada - Mass Digitization | 
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/b7e8aa22-6107-45ee-8274-5aa92c424746 | 
| Harvard University Herbaria Barcode | 00466775 | 
| Herbarium | GH | 
| Previous ownership | [ex] Herbarium of Boston State College Boston, Massachusetts; Transferred from Massachusetts College of Liberal Arts Herbarium (NASC) | 
| Family | Plantaginaceae | 
| Determination |  Callitriche heterophylla Pursh | 
| Determination Remarks |  [filed under] [current name] | 
| Sex | not determined | 
| Phenology | NotDetermined | 
| Preparation Type | Sheet | 
| Preparation Method | Pressed |