| Name | Calamagrostis deschampsioides subsp. macrantha Piper |
| Authorship | Piper |
| Rank | Subspecies |
| NomenclaturalStatus | NomLeg |
| Placed in | Calamagrostis deschampsioides Trinius |
| GUID | urn:lsid:ipni.org:names:40424-2 |
| Citation | 1910 Contr. U.S. Natl. Herb. 13: 59 |
| Holdings | 1 Specimen held in the Harvard University Herbaria identified as Calamagrostis deschampsioides subsp. macrantha Piper |
| Identification made in | [no date] (1) |