| Classification | Onagraceae: Ludwigia |
| Harvard University Herbaria Barcode(s) | 00312695 |
| Type Status | Holotype |
| Collector | W. P. Rich |
| Country | United States of America |
| State | Massachusetts |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Massachusetts: Plymouth County: Lakeville |
| Locality | Stony shore of Quitacas Pond |
| Date Collected | 1899-08-27 |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/625f6524-c202-49fe-9042-d99091b1aab5 |
| Harvard University Herbaria Barcode | 00312695 |
| Herbarium | GH |
| Family | Onagraceae |
| Type Status | Holotype |
| Holotype of | Ludwigia sphaerocarpa var. macrocarpa Fernald & Griscom |
| Verified by | Peng, Ching I |
| Date Determined | 1982 |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Ludwigia sphaerocarpa var. macrocarpa Fernald & Griscom) Rhodora 1935. 37: 174. |
| Family | Onagraceae |
| Determination | Ludwigia sphaerocarpa Elliott |
| Determined by | Peng, Ching I |
| Date Determined | 1982 |
| Determination Remarks | [current name] |
| Family | Onagraceae |
| Determination | Ludwigia sphaerocarpa var. macrocarpa Fernald & Griscom |
| Determined by | Fernald, Merritt Lyndon |
| Annotation Text | Type n. var. |
| Family | Onagraceae |
| Determination | Ludwigia sphaerocarpa Elliott |
| Determination Remarks | [label name] |
| Phenology | Fruit |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
