Rumex triangulivalvis
{{Short description|Species of flowering plant}}
{{Speciesbox
| image = Rumex-triangulivalvis01.jpg
| genus = Rumex
| species = triangulivalvis
| authority = (Danser) Rech.f.
}}
Rumex triangulivalvis is a species of flowering plant belonging to the family Polygonaceae.{{cite web |title=Rumex triangulivalvis (Danser) Rech.f. {{!}} Plants of the World Online {{!}} Kew Science |url=https://powo.science.kew.org/taxon/urn:lsid:ipni.org:names:224516-2 |website=Plants of the World Online |access-date=14 February 2021 |language=en}}