| Classification | Lemnaceae: Wolffia |
| Harvard University Herbaria Barcode(s) | 00348645 |
| Type Status | Isolectotype |
| Collector | E. Hall |
| Country | United States of America |
| State | Illinois |
| Geography | North America: North America (CA, US, MX) (Region): United States of America: Illinois |
| Locality | between Springfield and Athens |
| Date Collected | 1867-09-** |
| Habitat | in a lake |
| GUID | http://purl.oclc.org/net/edu.harvard.huh/guid/uuid/b584a5c1-5af4-4b9a-8cdc-c3afb0b23b0e |
| Harvard University Herbaria Barcode | 00348645 |
| Herbarium | GH |
| Previous ownership | Ex Herb. A. Gray, [ex] Herbarium of Emile Francis Williams. Given to the Gray Herbarium, 1913 |
| Family | Lemnaceae |
| Type Status | Isolectotype |
| Isolectotype of | Wolffia brasiliensis var. borealis Engelmann |
| Verified by | Kittredge, Walter Tobey |
| Date Determined | 2012 |
| Determination Remarks | [filed under] |
| Taxon Reference | (for Wolffia brasiliensis var. borealis Engelmann) Exsicc. Herb. Engelmann 1867 [Sep 1867]. Wolffia s.n.. |
| Family | Lemnaceae |
| Determination | Wolffia borealis (Engelmann) Landolt & Wildi ex Gandhi, Wiersema & Brouillet |
| Determined by | Kittredge, Walter Tobey |
| Date Determined | 2012 |
| Determination Remarks | [current name] |
| Family | Lemnaceae |
| Determination | Wolffia columbiana H. Karsten |
| Determined by | det. by G. Engelmann |
| Determination Remarks | [label name] |
| Family | Lemnaceae |
| Determination | Wolffia brasiliensis Weddell |
| Determined by | det. by G. Engelmann |
| Determination Remarks | [label name] |
| Preparation Type | Sheet |
| Preparation Method | Pressed |
