| Name | Sargassum natans (Linnaeus) Gaillon | 
| Authorship | (Linnaeus) Gaillon | 
| Rank | Species | 
| Placed in | Sargassum C. Agardh | 
| GUID | urn:lsid:marinespecies.org:taxname:145560 | 
| Holdings | 2 Specimens held in the Harvard University Herbaria identified as Sargassum natans (Linnaeus) Gaillon | 
| Identification made in | [no date] (2) | 
