Aethu'sa Cyna'pium, Fool's Parsley, Small Hemlock. -- Leaves non-poisonous, and sometimes carelessly mixed with those of conium -- the plants, however, being distinguished easily as Aethusa Cynapium has leaves of different shape, darker color, leek-like odor; occasionally have mixed also the pubescent ciliate leaflets of several species of Chaerophyl'lum.