It is the Fool's parsley or Garden Hemlock . The tincture is made from the whole fresh plant, gathered when in flower and fruit. Imported. What is our principal use of Aethusa ? Vomiting in children of large and sometimes green curds of milk, followed by great exhaustion ; there is a drawn look about the mouth suggestive of nausea. It may also be found useful in thin, yellow-green diarrhoea, preceded by cramps. Gastro-intestinal catarrh.