Calamagrostis purpurea
{{Short description|Species of grass}}
{{Speciesbox
| image = Calamagrostis phragmitoides 01.JPG
| genus = Calamagrostis
| species = purpurea
| authority = (Trin.) Trin.
| synonyms = Calamagrostis phragmitoides Hartm.
}}
Calamagrostis purpurea is a species of grass in the family Poaceae.{{cite web |title=Calamagrostis purpurea (Trin.) Trin. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:394764-1 |website=Plants of the World Online |access-date=1 February 2021 |language=en}}