Sorrel, Transylvanian Reputedly not invasive, as ordinary sorrel is. - site says: 'Rumex acetosa. Perennial. A variety of garden sorrel with nice, long, strap-shaped leaves. Good color and flavor all winter. Needs water in the summer to keep growing. Collected by The Seed Ambassadors Project from a Hungarian farmer at the farmers’ market in Cluj, Romania, on our 2008 trip to Transylvania.