This is the true French sorrel, a much smaller-leaved species than the more common garden sorrel we mostly see in the United States. Its tiny buckle-shaped leaves have a sharper, more lemony taste than garden sorrel, but in smaller quantities it can be used similarly to flavour sauces and soups (such as sorrel leek or sorrel potato soup). Delicious!
Water: Can tolerate short dry spells
Hardiness: Frost Hardy
Habit: Rosette of leaves to 12” wide, with flowers rising to 3' tall
Light: Full Sun to Partial Shade