| Classification | Plantaginaceae: Callitriche |
| Harvard University Herbaria Barcode(s) | 00872971 |
| Collector | H. D. Thoreau |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Middlesex County: Concord |
| Locality | Collier ditch ["Collier's field north of the railroad between the town center and the Walden woods" fide R. L. Angelo, Dec. 7, 2018] |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/18d2f822-01b6-440d-8edf-76b7ba05422d |
| Harvard University Herbaria Barcode | 00872971 |
| Herbarium | GH |
| Family | Plantaginaceae |
| Determination | Callitriche sp. |
| Determination Remarks | [is label name] |
| Family | Plantaginaceae |
| Determination | Callitriche heterophylla Pursh |
| Determined by | Thomas Philbrick |
| Determination Remarks | [is filed under name] [is Current name] |
| Subcollection | Thoreau Herbarium |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
