Scurvy Grass Oxalis enneaphylla 

A plant named for it's antiscorbutic properties, recognised by early mariners who ate it to prevent scurvy. It's stalks have long been used by islanders to make 'Scurvy Wine'. This is a perennial herb with pale green leaves and large soft flowers which may be white or pink. Stalks are long and pale red and like the flowers themselves are edible. 

Common on coastal and Diddle Dee heathland. Abundant on East and West Falklands. Also found on neighbouring Fuegia, Andean Patagonia to 48°S.