"Narrow-leaved sorrel" and variants redirect here. These terms may also refer to curled dock (R. crispus).Common sorrel or garden sorrel (Rumex acetosa), often simply called sorrel, is a perennial herb in the family Polygonaceae. Other names for sorrel include spinach dock and narrow-leaved dock. It is a common plant in grassland habitats and is cultivated as a garden herb or leaf vegetable (pot herb).