Common sorrel (Rumex acetosa) is a relative of the broad-leaved dock and has been cultivated for centuries. It can be found in meadows, verges and hedgerows. It is sometimes used in soups or its leaves used in salads. However, it has a sharp taste due to the oxalic acid it contains. It also has a laxative effect in humans if it is ingested in large quantities. Rabbits seldom eat it.