| Name | Glyceria grandis S. Watson |
| Authorship | S. Watson |
| Rank | Species |
| NomenclaturalStatus | NomLeg |
| Placed in | Glyceria |
| Contains | Glyceria grandis f. pallescens Fernald |
| GUID | urn:lsid:ipni.org:names:404110-1 |
| Citation | 1890 Manual (Gray), ed. 6 667 |
| Holdings | 200 Specimens held in the Harvard University Herbaria identified as Glyceria grandis S. Watson |
| Identification made in | [no date] (194), 2011 (2), 2013 (4) |