| Name | Myriophyllum laxum Shuttleworth ex Chapman |
| Authorship | Shuttleworth ex Chapman |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Myriophyllum |
| GUID | urn:lsid:ipni.org:names:430427-1 |
| Citation | Fl. S.E. U.S. [Small] 143 |
| Holdings | 12 Specimens held in the Harvard University Herbaria identified as Myriophyllum laxum Shuttleworth ex Chapman |
| Identification made in | [no date] (7), 1985 (1), 2013 (4) |