Common sorrel or garden sorrel (Rumex acetosa), often simply called sorrel, is a perennial herb that is cultivated as a garden herb or leaf vegetable (pot herb). Sorrel is also know by the names spinach dock and narrow-leaved dock.
Rumex stenophyllus Ledeb.
Common sorrel has been cultivated for centuries. The leaves may be puréed in soups and sauces or added to salads and shav; they have a flavour that is similar to kiwifruit or sour wild strawberries. The plant's sharp taste is due to oxalic acid, which is a poison. In small quantities sorrel is harmless; in large quantities it can be fatal.
- "Sorrel-Uses And Side Effects". www.womens-health-club.com.