Polygonaceae
| Authority | : | Jussieu, 1789 |
| Nederlands | : | Duizendknoopfamilie |
| English | : | knotweed family, buckwheat family |
| Deutsch | : | Knöterichgewächse |
| Oxyria digyna |
| Authority | : | Hill, 1768 |
| Synonyms | : | Rumex digynus Linnaeus, 1753 |
| English | : | mountain sorrel |
| Deutsch | : | Alpen-Säuerling |
| Norsk | : | fjellsyre |
| Svenska | : | fjällsyra |
| Français | : | oseille glaciaire |
| Italiano | : | acetosa soldanella |
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| Keri∂, Iceland; 22 July 2014. | |