It is a common plant in grassland habitats and is cultivated as a garden herb or salad vegetable (pot herb). In Albania, the leaves are simmered and served cold marinated in olive oil, or as an ingredient for filling byrek pies (byrek me lakra). Sorrel. (Wood Sorrel) Oxalis is a genus of about 800 species of annuals and perennials in the family Oxalidaceae, mostly native to South America and Africa. Full Definitions of sorrel. More example sentences. The most common preparation is aveluk soup, where the leaves are rehydrated and rinsed to reduce bitterness, then stewed with onions, potatoes, walnuts, garlic and bulgur wheat or lentils, and sometimes sour plums.